Electrolytic or electrophoretic processes and apparatus therefor (C25)

C   Chemistry; metallurgy(315514)
C25            Electrolytic or electrophoretic processes; apparatus therefor(12345)
Carbon composition for electrode of supercapacitor element, the electrode, method of its production and element containing it // 2627699
FIELD: chemistry.SUBSTANCE: invention relates to carbonaceous composition suitable for production of supercapacitor electrode in contact with aqueous ionic electrolyte, wherein the composition is based on carbon powder capable of storing and releasing electric power and includes a hydrophilic binder system. Said system comprises: according to mass fraction in composition from 3% to 10%, at least one first cross-linked polymer having average molecular weight Mn greater than 1000 g/mol and containing alcohol groups, and in accordance with mass fraction in composition from 0.3% to 3%, at least one second polymer, at least one acid having pKa from 0 to 6 and average molecular weight Mn is greater than 500 g/mol, wherein said at least one first polymer is crosslinked in presence of said, at least one second polymer. The invention also relates to porous electrode, method for producing the electrode and supercapacitor element.EFFECT: ensure energy efficiency by optimizing capacitance and potential of the supercapacitor.17 cl, 5 tbl, 10 ex
ethod for producing calcium fluoride from fluorocarbon-containing waste of aluminium production // 2627431
FIELD: chemistry.SUBSTANCE: method for producing calcium fluoride from fluorocarbon-containing wastes of aluminium production involves treatment of fluor-containing solutions with calcium hydroxide, followed by separation of the solution and a pulp and liberation of calcium fluoride, which is washed with water. As a fluor-containing solution, a solution is used, obtained by leaching solid fine-dispersed fluorocarbon-containing waste of electrolytical aluminium production - sludge from gas cleaning, dust from electrostatic precipitators and spent coal lining. Fluorocarbon-containing wastes are submitted for treatment in a ratio of T:H=:(10-11) with respect to a 2-2.5% solution of sodium hydroxide. The treatment is carried out at a leach solution temperature of 65-85°C.EFFECT: invention makes it possible to produce calcium fluoride from solid fine-dispersed fluorocarbon-containing waste of electrolytic aluminium production with a fluor content in the solid phase of 12 to 25 percent.2 cl, 4 tbl
Electrolyte for zinc-nickel coatings deposition // 2627319
FIELD: metallurgy.SUBSTANCE: electrolyte for zinc-nickel coatings electrodeposition contains zinc oxide, sodium hydroxide, nickel sulfate, triethanolamine, diglycine and water, and also includes ethylenediamine-disuccinic acid (EDDSA) at the following component ratio, g/l: zinc oxide 12; caustic soda 100; nickel sulphate 7; triethanolamine 20; EDDSA 0.5; diglycine 2; water up to 1 liter.EFFECT: reduction of the electroplating corrosion rate with application of environmentally safe process of galvanic coating.3 tbl, 4 ex

Substrate with coating for packaging applications and production method of mentioned substrate // 2627076
FIELD: metallurgy.SUBSTANCE: steel substrate for the cans production has the coating from one or both sides in the form of the iron-tin alloy layer, which contains at least 85 wt % FeSn (50 at % I\iron and 50 at % tin), and wherein the iron-tin alloy layer or layers are provided with the coating layer with chromium metal - chromium oxide, obtained as the result of the trivalent chromium process, the thickness of which corresponds to at least 20 mg Cr/m2. The invention also relates to the mentioned coated substrate process production.EFFECT: development of the tinplate alternative, which is not based on the hexavalent chromium use, requires the moderate amounts of tin and combines the excellent corrosion resistance with optimal optical properties.22 cl, 3 tbl, 8 dwg
ethod of electrochemical application of nickel coating // 2626700
FIELD: chemistry.SUBSTANCE: method involves electrochemical deposition of nickel on a pre-prepared steel plate from an electrolyte containing nickel sulfate (II) sulfate crystal hydrate, nickel (II) chloride hydrate, boric acid and water. Before electrochemical deposition of nickel, a pre-prepared steel plate is held in the electrolyte at a temperature of 20-25°C and a potential of -0.45 V relative to the silver chloride reference electrode. The electrolyte is used as an electrolyte containing: 140 g/l of nickel sulphate crystal hydrate (II), 70 g/l of nickel chloride (II) chloride hydrate, 25 g/l of boric acid and water up to 1 l, And the electrochemical deposition of nickel from mentioned electrolyte is carried out at a temperature of 20-25°C, the cathode current density is 3.5-5.5 A/dm2 and a pH of 5.5.EFFECT: increasing the environmental purity of the process by reducing the evaporation of the electrolyte from the surface of the bath, the method makes it possible to obtain an even semi-glossy nickel coating with a high current and microhardness value.1 tbl, 13 ex

Systems and methods for prevention of thermal reactions in electrolysers // 2626517
FIELD: chemistry.SUBSTANCE: method includes detecting information indicative of a thermite reaction, comparing information indicative of a thermite response with a threshold value, generating a thermal response signal according to comparison, and responding to a thermite response by adjusting the cell operating mode. As an indicator, one of the indicators is used, including voltage, voltage drop, current, electric field and a magnetic field associated with one or more anodes. An aluminium electrolysis cell having a device for said monitoring is disclosed.EFFECT: possibility of eliminating damage to the cell by preventing the occurrence of a thermite reaction.25 cl, 27 dwg

Device for dosing feed stock supply to aluminium electrolyser // 2626261
FIELD: metallurgy.SUBSTANCE: device contains a dosing hopper, a dosing chamber with an inlet and outlet ports and a flange, a drive rod mounted in a protective casing with an annular rib that is connected to the flange of the dosing chamber and the upper and lower locking elements located on the stem. Each of the locking elements is formed from a centring member configured to be placed in the cavity of the dispensing chamber with freedom of translation, and a lid associated with or integral to the centring element. The covers of the upper and lower locking elements have a diameter larger than the inner diameter of the reciprocating end portions of the dispensing chamber, and are perpendicular to the inlet and outlet openings formed by flat and/or annular rims formed by annular grooves of a triangular, trapezoidal or other shape, at the extreme positions of the rod with the end portions of the dispensing chamber having a shape corresponding to the shape of the groove, or a flat shape.EFFECT: increasing the reliability of sealing the gap between the mating surfaces of the locking elements of the end parts of the dosing chamber and stabilizing the dose of raw material supplied to the cell.11 cl, 6 dwg
ethod for protecting carbon-graphite hearth of aluminium electrolyser // 2626128
FIELD: metallurgy.SUBSTANCE: method involves the formation of an electrical resistance layer on the anode projection bottom, the release of the starting material into the space "board-anode" and the inclusion of the series current. The electrical resistance layer is formed from a batch containing coke, lithium carbonate and crystalline silicon, after the formation of the layer, baking is carried out at a temperature of 950 to 970°C.EFFECT: reducing the negative effects associated with the adsorption and penetration of sodium into the carbon-graphite lining during the cell start-up phase, increasing the resistance and strength of the carbon-graphite liner, increasing the cell life and productivity, improving the grade of the aluminium produced, and reducing power consumption.3 tbl

ethod of producing electrolyte bath for application of a metallic primer layer based on the platinum on a metal substrate // 2625923
FIELD: chemistry.SUBSTANCE: method comprises the steps of: a) providing a first solution of an amino ligand of an aqueous system, comprising at least one compound X- (NH2)n, wherein X is selected from the group CH3, CH3-CH2, CH3-(CH2)m, or NH3, or salts xp-(NH4)+p, where x is an acid radical selected from the group of PO43-, HPO42-, H2PO4-, HPO42- and H2PO4-, SO42-, HSO4-, HSO4- and CH3COO-, where n, m and p are integers different from zero; b) providing a second system a buffer; c) providing a third system of an aqueous platinum salt solution; d) providing a fourth system to impart conductivity a) systems are mixed, a), b), d) with formation of B solution, system c) forms an aqueous solution A, containing a salt of platinum IV and NaOH, cover solution B and heated to 50°C for 1.5 hours, solution A is added to solution B to form an electrolyte.EFFECT: increase the life of the electrolyte and increasing stable, for a long time, properties of the metal coating.10 cl, 2 tbl, 3 ex, 2 dwg
ethod of micro arc oxidation of rods from titanium wire for implementation of wear-resistant pads // 2625516
FIELD: metallurgy.SUBSTANCE: method of micro arc oxidation (MAO) of bars made from titanium wire of "ВТ6св" grade for the products wear-resistant pads from titanium alloys, that work for a long time under the hard modes of cyclic loading, includes the electrolytic process, proceeding at the voltage of 290÷310 V, while MAO is carried out in the aqueous electrolyte with the solution of Na3PO4 and concentration of 14 g/l, pH 10.5÷11 at the temperature of 20°C for (150±10) minutes.EFFECT: development of the titanium alloy micro arc oxidation method for the wear-resistant pads, which allows to increase the weld deposit hardness.1 tbl

Device for cleaning pipeline system for gas removal of aluminium electrolysis // 2625152
FIELD: electricity.SUBSTANCE: device comprises performing outboard housing for cleaning exhaust ducts and hydraulic motor hydraulical drive mounted within the housing and coupled to the rotational torque from sprocket via a chain, the sprocket is fixed to motor shaft, wherein on mentioned shaft, there is a reel with a spirally wound spring, adapted to free movement along the axis of the shaft on the rollers, wherein the spring is movable on rollers along the guide tube to the outlet of the housing for the free end of the spring is fixed cleaning tip and the other end of the spring is secured to the shaft inside the reel.EFFECT: increased efficiency of gas suction of the electrolyser.6 dwg
ethod of electrochemical processing of the steel detail // 2624881
FIELD: metallurgy.SUBSTANCE: method involves the action of an electrolyte on a part using an electric current at a temperature of 30-40°C. The part is connected to the positive pole of a constant current source and an electrolyte prepared by dissolving perchloric acid 60-90 g, ethanol 540-590 g, butyl glycol 80-120 g in distilled water 100-140 g, and the processing of the part in the electrolyte is carried out at a voltage of 15-20 V for 3-5 minutes.EFFECT: reduced processing time, surface roughness and hardness of the product.7 dwg, 3 ex
ethod for producing massifs of cobalt nanowires // 2624573
FIELD: chemistry.SUBSTANCE: method involves electrodeposition of cobalt in the pores of the track-etched membranes electrolyte containing⋅ CoSO4⋅7H2O - 300-320 g/l, H3BO3 - 30-40 g/l, at pH 3.5-3.8 and temperature 40-45°C. Electrodeposition is performed using a potential sensor in the form of chloride-argentic reference electrode at a fixed distance between the cathode and the chloride-argentic reference electrode constituting 2-4 mm, and controlled by a constant voltage of 750-900 mV between them.EFFECT: improved homogeneity adjustment wires.4 ex
ethod of phosphatory of magnetic-aluminium alloys of type permalloy (versions) // 2624566
FIELD: chemistry.SUBSTANCE: first version of the method involves applying a galvanic zinc coating from a zincate electrolyte containing ZnO-6-14 g/dm3 and NaOH is 80-140 g/dm3, at a current density of 3-4 A/dm2, the ratio of the anode and cathode surface 1:2 and temperature 15-30°C for 5-7 minutes. After that, a layer of zinc is applied to the phosphate layer at a temperature of 95-98°C for 2-3 minutes with a solution containing, g/dm3: P2O5 - 7.4-9.8, Mn2+ - 2.1-2.8, Zn2+ - 11.0-13.0, NO3- - 21.0-25.0, NO2- - 0.3-0.5. In the second version of the method, a galvanic zinc coating is applied to the surface of the alloy from a cyanide electrolyte containing ZnO-15-45 g/dm3, NaCN - 30-120 g/dm3, NaOH 35-100 g/dm3, with a current density of 1-5 A/dm2, the ratio of anode and cathode surface 1:1 and temperature 15-30°C for 14-17 minutes, after which the phosphate layer is applied in the first version.EFFECT: obtaining a dense, fine-crystalline homogeneous phosphate film with a thickness of 8-15 mcm, having a breakdown voltage not lower than 70 V.4 cl, 2 ex

Device for gases collecting and removing from aluminium electrolyser // 2624559
FIELD: metallurgy.SUBSTANCE: device for collecting and evacuating anode gases from under the shelter of an electrolyser with burned anodes through gas-collecting windows through the gas channels of the beam-collector contains a flow-guiding structure. The flow-directing structure is fixed to the flange of the beam-collector and consists of the main longitudinal, additional longitudinal and transverse plates installed on the flange of the beam-collector, dividing the zone of depressurization under the flange of the beam-collector into at least three channels for the removal and evacuation of anode gases.EFFECT: increasing the effectiveness of the system for removing the gases of the cell when the cell is not hermetically sealed.4 cl, 5 dwg
ethod for regeneration of electrolytes based on sodium nitrate and chloride aqueous solutions // 2624553
FIELD: chemistry.SUBSTANCE: invention relates to electrocoagulation regeneration of electrolytes based on aqueous solutions of sodium nitrate and chloride containing hexavalent chromium ions, and can be used in the process of gas turbine engine blades electrochemical treatment. The method for regeneration of the electrolyte based on an aqueous solution of sodium chloride and nitrate, applied for electrochemical treatment of gas turbine engine blades made of high-alloy steels, includes electrolyte electrocoagulation, when the electrolyte is first treated by straight polarity DC current at a current density of 0.4-0.5 A/dm2 for 5-10 minutes, and thenby opposite polarity DC current at the same current density and exposure duration, during treatment, the resulting slurry is removed from the electrolyte.EFFECT: highly significant reduction in hexavalent chromium ions concentration in the electrolyte.1 dwg, 1 tbl

Anode device of aluminium electrolyser // 2624275
FIELD: electricity.SUBSTANCE: anode device contains a collector beam with vertical support posts resting on the flanged sheet of the cathode housing, an electrolyser cover with removable and swinging flaps located along the longitudinal and end sides of the electrolyser. The collector beam of the anode device has a U-shaped opening made along the entire height of the collector beam from the front side of the electrolyser, the width and length of the U-shaped opening being adapted to move a vacuum ladle for collecting the metal vertically.EFFECT: possibility of reducing the width of the electrolyser body with the transverse arrangement of electrolysers, reduction of time of the technological operation to collect metal from the electrolytic bath.6 cl, 3 dwg

ethod of tracking, protection and safe electrolytic system switching off // 2624222
FIELD: electricity.SUBSTANCE: invention relates to a method for failures tracking associated with a stream of feedstock gas and/or purification stream in electrolytic cells, batteries or systems, this tracking process is combined with precautionary measures to be taken in the event of such failures. In this case, (a) the current and/or voltage are monitored and controlled on a single battery, on all batteries or on one or more selected batteries of the electrolytic systems, (b) in case when the current, voltage or voltage-to-current ratio crosses its predetermined threshold value, the fault mode is found and the message is transmitted to the control system, and (c) the system voltage levels are controlled providing location within safe limits (safe mode limits), while tracking both current and voltage for failures detection in operation and transition to protective voltage levels in case of failure, the same power supply is used, the protective voltage between 600 and 1500 mV per cell is applied to each battery cell, and additional protection is provided by performing one or more of the following actions: (1) blowing potentially oxidizable electrodes with oxygen-free gases, (2) the electrolytic cell of the battery gradual cooling either by blowing gases, or by the passive heat output from the system and (3) maintaining the electrolytic voltage on each element of the plurality of cells and batteries at least until their temperature falls below the electrolytic cell electrodes oxidation threshold.EFFECT: invention makes it possible to effectively monitor the failure operations associated with a raw or blowing-off gas stream.11 cl, 2 ex, 6 dwg
Production technique of a cathodic conductive plates of sintered-slug tantalum electrolytic capacitor // 2623969
FIELD: electricity.SUBSTANCE: technique comprises the cathodic tantalum conductive plates surface preparation preliminary to coating process, the voltaic ruthenic coating application to the surface of a conductive plate and the ruthenic coating anodization. Along with this, the conductive plates surface preparation is led by centrifuge test or by cataphoresis for the application of a not agglomerated tantalum powder with the charge-to-mass ratio up to 150000 microcoulomb/gr and middle fraction of 2.5 micron and by following vacuum sintering under a trapped pressure of 10-5 Mmhg, at a temperature of 1050°C within the hour. On completing the sintering the electrolyte ruthenic coating electroplating in thickness of 2.0-4.0 micron is carried out. The electrolyte comprises g/l: Ru(OH)Cl3 (in terms of the equivalent amount of metal) 5-10; NH2SO3H 30 and water that is deionized or distilled to 1 l at a temperature of 60±10°C, at a pressure of 3 volt, cathodic current density of 2-6 ampere per square decimeter, cycle numbers of 4-5 and single cycle time of 10-15 min, and the anodization is carried out in a 38% dipping acid solution.EFFECT: capacitor volume efficiency and reliability increase while running in the reloading mode over a wide temperature range, leakage current and loss-angle tangent decrease.2 cl, 8 tbl, 5 ex

Plant for electrolyte-plasma treatment of turbine blades // 2623555
FIELD: electricity.SUBSTANCE: plant comprises of an operating cell and an electrolyte conrol cell with a heating element that are connected to each other by an electrolyte drainage pipeline with an electrolyte transfer pump, a power source the positive electrode of which is connected to the fixing clip, and a treatment process control unit connected to the electrolyte transfer pump, a power source and heating element. The operating cell is fixed in the housing below a movable platform on guides, which is connected with an motor providing transverse platform movement. There are turning centers on the platform. One of them is connected to a rotation motor in the upper housing part. A moving unit is installed on the guides for moving a cathode module with a longitudinal movement motor. There is a movable block on the moving unit for vertical movement of the vertical movement motor, mounted on the horizontal movement unit. There is a cathode module rotation assembly on the vertical movement unit. It is connected to a pivoting motor. There is an electrolyte supply pipeline in or on the pivoting assembly. One end of the pipeline has the cathode module installed and the other end is led in the electrolyte control cell with a temperature sensor. There are electrolyte flow rate and volume sensors mounted on the electrolyte supply pipeline. There is the second temperature sensor installed between the cells on the electrolyte drainage pipeline. The control unit is coupled with the sensors and the plant motor.EFFECT: increased precision of turbine blades treatment and lower power consumption of the plant.1 tbl, 2 dwg
ethod of electrochemical oxidation of cerium // 2623542
FIELD: chemistry.SUBSTANCE: invention relates to the processing of a concentrate of REM with separation of cerium from it by the method of electrooxidation, namely to the method of electrochemical oxidation of cerium (III) in nitrate solutions during the processing of rare-earth metal concentrates (REM), followed by extraction or precipitation of cerium carbonate or oxalate. The method involves the electrochemical oxidation of cerium in a nitrate solution in a two-cell electrolysis cell with a ceramic porous diaphragm made by the plasma chemical method. An insoluble titanium anode coated with iridium dioxide is used. The process is carried out at an operating temperature of 35-47°C and a gradual decrease in the anode current density as the concentration of cerium (+III) decreases. Cathode cell space, the catholyte level is supported above the level of anolyte.EFFECT: process simplification, increase in current output by increasing the speed of oxidation of cerium.3 cl, 3 ex

ethod of permalloy films ni81 fe19 electrochemical local deposition for the integrated microsystems // 2623536
FIELD: metallurgy.SUBSTANCE: method involves the electrochemical deposition of permalloy films in the galvanic bath with vertical arrangement of electrodes at the constant current with the chloride electrolyte stirring, which contains the nickel and iron atoms at the ratio of concentrations NNi/NFe=4.26, corresponding to the composition of the alloy, the addition of the hydrochloric acid is introduced to obtain pH=1.7±10% in the electrolyte with the temperature 60-70°C, and deposition is carried out at the current density of 20±1.0 mA/cm2 in the local areas, bounded by the photoresist mask at the oxidized silicon wafer, the surface of which is metallized by nickel with the nichrome sub-layer. The cathode and anode are the sheets of nickel foil and the cathode contacts to the metallized layer at the edge of the wafer.EFFECT: production of permalloy films with the thickness of about 10 mcm by reducing the mechanical stresses in the film and improved magnetic properties without high-temperature annealing.4 dwg

Device for plasma-electrolytic oxidation of metals and alloys // 2623531
FIELD: electricity.SUBSTANCE: device contains a three-phase AC or DC voltage source connected to a three-phase bridge rectifier, which outputs are connected to the filter, the first and second voltage sensors, step-up high-frequency transformer, which secondary winding is connected to the workpiece by one output and to the cathode of the bath with electrolyte by another output, the first current sensor, a computer which controls the microcontroller. It additionally contains a step-down and step-up voltage regulators, the second current sensor, which data output is connected to the fourth input of the microcontroller, the first choke, an active voltage divider and a half-bridge voltage inverter. The power inputs of the step-down regulator are connected to the filter, and the power outputs - one directly and another - via the second current sensor and the first choke - are connected to the power inputs of the step-up regulator, which power outputs are connected to the first voltage sensor, the power inputs of the active voltage divider and half-bridge inverter, and the data inputs of both regulators are connected respectively to the first and second outputs of the driver unit. The active voltage divider generates the anode and cathode voltage amplitudes.EFFECT: simple device control algorithm and reduction in its size and weight.1 dwg
Electrolyte for galvanic sedimentation of nickel-aluminium coatings // 2623514
FIELD: chemistry.SUBSTANCE: electrolyte contains a eutectic mixture of choline chloride and urea, the eutectic mixture being prepared by mixing the components in a molar ratio of 1:2 in which nickel chloride and aluminium chloride are dissolved in an amount of g/l solution: nickel chloride 3.2- 33.0, aluminium chloride 12.5-144.0.EFFECT: obtaining high-quality thin non-porous coatings and reducing the toxicity of the electrolyte by using environmentally friendly components.1 cl

Electrolytic cell for producing hydrogen and oxygen from water // 2623437
FIELD: chemistry.SUBSTANCE: invention relates to an electrolytic cell for the production of hydrogen and oxygen from water, consisting of a casing with a cathode housed therein in the form of a hollow cylinder of a porous hydrophobic material and an anode in the form of a metal tube located between them in the form of a gas-stop membrane, gas cavity between the outer wall of the cathode and the inner wall of the casing, the anode cavity inside the anode, with the anode applied to the surface and the cathode surface by the catalyst. The cell is characterized in that an anode made of perforated metal sheet attached on the outer surface of the metallic mesh coated with a catalyst, a cathode made of a porous hydrophobised material coated on its outer surface by the hydrogen cavity catalyst and the inner side with attached to it mesh coated with a catalyst gas-closing separator consists of a porous membrane of a hydrophilic material, surrounded on both sides by one or more layers of the separating material, sealing the cavity relative to the cavity hydrogen oxygen is carried out in the assembly due to the cell as a flange made of insulating material and having a ring grooves with gaskets to create a seal along the ends of the cathode at the points of contact with the flanges, and by squeezing the upper and lower ends of the separator when the electrolyser is assembled, protruding beyond the anode and the grids attached to the cathode and anode, between the outer end conical surfaces of the corresponding flanges and corresponding to the inner end conical surfaces of the cathode.EFFECT: use of the proposed device allows to minimize energy costs for own needs and, as a result, to increase the efficiency of the claimed cell, increase the reliability of the cell operation and the purity of the produced gases.9 cl, 3 dwg

ethod of anticorrosive processing of aluminium surface or aluminium alloys // 2622466
FIELD: chemistry.SUBSTANCE: surface of the product is subjected to a pulsed energy effect by the radiation of a pulsed ytterbium fiber ytterbium laser with a wavelength of 1.065 mcm at a specific radiation power 4,539⋅1010…8,536⋅1010 W/cm2, the pulse repetition rate 20…40 kHz and the scanning speed of the surface by laser radiation 250…700 mm/s.EFFECT: obtaining on the surface of a product made of aluminium or an aluminium alloy of a dense impermeable passive film of aluminium oxide, effectively protecting the metal from corrosion.3 cl, 3 dwg, 1 tbl, 11 ex

ethod of chroming rotors of screw hydraulics // 2622216
FIELD: machine engineering.SUBSTANCE: method involves placing the rotor in a hollow anode, forcing the electrolyte into the space between the surfaces of the coated rotor and the anode, applying a layer of solid chromium at the temperature of 50°C in the electrolyte stream, an anode is used, the inner surface of the anode is made in the form of a helical gear surface, with the end profile of the anode being made in the form of an equidistant of the rotor end profile described by the equations xa=xr+H⋅sinνr, ya=yr+H⋅cosνr, νr=ξr-δr, where xa, ya - the coordinates of the anode end profile, xr, yr - the coordinates of the rotor end profile, H - the distance along the normal from the rotor tooth end profile to the equidistant, νr - the angle between the tangent to the end profile at the current point end of the rotor tooth profile and the axis of ordinates, ξr - the angle between the tangent to the end profile at the current point end of the rotor tooth profile and the radius passing through the current point, δr - the angle between the radius passing through the current point end of the rotor tooth profile and the axis of ordinates.EFFECT: creating a chrome coating with the same thickness of chromium over the entire profile of the rotor teeth, increasing the hardness of the coating.1 tbl, 1 ex, 4 dwg
ethod of electrolyte-plasma treatment of items manufactured with application of additive technologies // 2621744
FIELD: metallurgy.SUBSTANCE: method includes igniting a discharge between a workpiece manufactured by fusing fine particles of metals or alloys and a cathode by applying a positive potential to the article, the workpiece being fixed on a conductive suspension, immersed in an electrolyte bath containing a cathode in the form of a conductive plate, and rotate, a voltage in the range of 100 ≤ U ≤ 1000 V, the discharge current is in the range of 0.015 ≤ I ≤ 250 A and process the product for at least 15 seconds, with the electrolyte being a solution with a hydrogen index in the range of 2 ≤ pH ≤ 11.EFFECT: providing processing of external, internal and porous areas of the surface of products of complex geometric shape, increasing the degree of purification, roughness class and surface hardness of the product.3 cl, 9 dwg

Armored structure based on porous aluminium and method of its manufacture // 2621527
FIELD: metallurgy.SUBSTANCE: armored structure consists of porous open-cell aluminium containing 60-70% of open interconnected pores with a diameter in the range from 0.14 mm to 0.5 mm. A layer of aluminium oxide is deposited on the pore surface by microarc oxidation followed by impregnation in epoxy resin. The method for producing an armored structure based on porous aluminium is that the porous open-cell aluminium billets are placed in a container with a single-component electrolyte with liquid glass and subjected to microarc oxidation in the anode-cathode mode with a descending power for at least 120 minutes. When oxidizing the billets of porous aluminum, a projection with a rectangular profile with sides of 10×150 mm is made. It serves as a current lead for the supply of electric current. In the process of oxidation, the forced cooling system and the compressor for circulating the electrolyte at a pressure of not less than 0.8 MPa are used.EFFECT: increase in durability and degree of power absorption by armored material when it is affected by several striking elements simultaneously.3 cl, 3 dwg
Electrochemical method for holmium and nickel intermetallic compounds nanopowders production in halide melts // 2621508
FIELD: chemistry.SUBSTANCE: invention relates to electrochemical production of holmium and nickel intermetallic compounds nanopowders, which can be used as catalysts in chemical and petrochemical industries, hydrogen energy for reversible sorption of hydrogen, as well as for magnetic material creation. Electrolysis of a molten mixture containing potassium chloride, sodium chloride, holmium (III) chloride and nickel (II) chloride is performed in a quartz cell on a tungsten electrode at a temperature of 973°K and a current density of 0.5÷1.9 A/cm2.EFFECT: decreased temperature of electrolysis and obtaining of nickel and holmium intermetallic compounds nanopowders.6 dwg, 3 tbl, 5 ex

Product moulded by hot forming and manufacturing method for product moulded by hot forming // 2621501
FIELD: metallurgy.SUBSTANCE: product is obtained by hot foming of electrolytically galvanized steel sheet comprising wt %: C from 0.10 to 0.35, Si from 0.01 to 3.00, Al from 0.01 to 3.00, Mn from 1.0 to 3.5, P from 0.001 to 0.100, S from 0.001 to 0.010, N from 0.0005 to 0.0100, Ti from 0.000 to 0.200, Nb from 0.000 to 0.200, Mo from 0.00 to 1.00, Cr from 0.00 to 1.00, V from 0.000 to 1.000, Ni from 0.00 to 3.00, B from 0.0000 to 0.0050, Ca from 0.0000 to 0.0050, Mg from 0.0000 to 0.0050, iron and impurities are the rest. Specific weight of coating on each sheet surface is from 5 g/m2 to 40 g/m2. Galvanized plating layer contains from 0 g/m2 to 15 g/m2 of Zn-Fe-intermetallic compound and solid Fe-Zn-solution phase as the remaining amount. Number of dispersed particles with an average diameter of 10 nm to 1 mcm, presenting per 1 mm of galvanized plating layer length is from 1×10 particles to 1×104 particles.EFFECT: required adhesiveness of paint applied to surface of sheet without additional treatments.6 cl, 7 dwg, 5 tbl

ethod for removing anode gases of an aluminium electrolyser // 2621322
FIELD: electricity.SUBSTANCE: method involves burning the anode gases in the crevice burner mounted on the gas collecting bell of the cell and their afterburning, while afterburning of the combustible components is carried out by supplying air in the volume V1 through the air intake slots of the burner device, followed by the direction of the combustion products through the vertical section of the flue in the form of a flue-gas descent into the branch pipe of the flue descent, where air is supplied in the volume V2, The volume ratio V1 air, sucked through the air intake slots, to the volume of air V2, sucked through the branch pipe flue, is V1:V2=0.2÷0.25:1.EFFECT: improving the efficiency of anode gas removal.1 dwg

ethod for producing aluminium-based alloy and device for its implementation // 2621207
FIELD: metallurgy.SUBSTANCE: method for producing an aluminium-based alloy containing 1-3 wt % of scandium, involves preparing and melting of a mixture containing sodium, potassium and aluminium fluorides, continuously feeding into the melt at the temperature of 800-950°C of scandium oxide in an amount providing the maintenance of scandium oxide in the melt at a level of 1-8%, simultaneous aluminothermic reduction of scandium from its oxide and electrolytic decomposition of the formed alumina, periodic discharge of the produced alloy with the given composition and pouring of molten aluminium after unloading the alloy in the amount equal in weight to the unloaded alloy. The device for producing an alloy contains a steel casing lined inside with a refractory brick, with a bottom and a lid, an anode, a cathode, a graphite crucible placed on the bottom graphite block, which, with the blooms installed, is a current lead to the cathode, and between the inner lining of the casing and the heating elements are placed outside the crucible, and a dispenser is installed in the lid for continuous supply of scandium oxide, and an opening is provided for periodically charging the aluminium and periodically discharging the resulting alloy.EFFECT: invention allows to obtain an alloy of aluminium-scandium with the given composition, ensures high purity of the final product and a high level of scandium extraction.6 cl, 1 dwg, 5 ex
ethod of replacement of anode in electrolysis of melt in aluminium electrolyser // 2621202
FIELD: electricity.SUBSTANCE: method involves heating the new anodes before placing it in an electrolytic cell, which before replacing the previously installed under the cover of the cell in close proximity to the working anode in the post-launch period of operation of the cell. New anodes kept under cover for 8-48 h, recovered residue anodic working anode, the anode is heated in an electrolyser is set, and to place the preheated anode set a new anode.EFFECT: improvement of electrolysis technology.4 cl, 1 tbl, 1 dwg
ethod of loading the electrolyser cathode for preparing aluminium // 2621197
FIELD: electricity.SUBSTANCE: method involves filling and leveling the heat-insulating layer in the cathode device casing, filling, leveling and sealing the refractory layer, installing the bottom and side blocks, and then sealing the seams between them with a cold beat hearth. Before the fill insulation layer on the bottom of the casing, a layer of fine particles of the carbonation is created.EFFECT: reducing the cost of lining materials, reduced energy consumption during the electrolysis by improving the thermal resistance of the thermal insulation in the basement, an increase in the period of electrolyzers.3 cl, 2 dwg, 2 tbl

Device for transportating paste in two perpendicular directions and plant for producing moulded blocks containing such device // 2621094
FIELD: transportation.SUBSTANCE: invention relates to a transport device for transporting carbonaceous paste, that is movable along the main path for rollers, passing in the first main direction for feeding the paste to a machine for moulding blocks for manufacturing electrodes, in particular, anodes of an aluminium electrolyser. The device comprises the main frame with rotating means cooperating with the main path for the rollers for moving the main frame in the main direction, the conveying hopper supported by the main frame and suitable for loading with carbonaceous paste. The main frame forms the auxiliary path for rollers, passing in the second auxiliary direction perpendicular to the main direction. The device contains the supporting frame connected with the conveying hopper and having rotating means for moving the supporting frame of the auxiliary path for rollers in the auxiliary direction. A plant for producing moulded blocks for manufacturing electrodes, in particular anodes of an aluminium electrolyser, is also disclosed.EFFECT: increasing the performance of manufacturing the blocks.8 cl, 7 dwg

Electrolytic cell for production of aluminium // 2621084
FIELD: electricity.SUBSTANCE: electrolytic cell contains a body with side and bottom lining, the end anodes and cathodes, located on the opposite sides of the electrolytic cell body and vertically installed between them non-consumable bipolar electrodes, while non-consumable bipolar electrodes forming the electrolysis modules are installed along the electrolytic cell axis in rows, the corundum power and aluminium collection modules are located between. The electrolytic cell side and bottom lining is made of corundum containing material and is covered with the layer of deep calcined alumina, and the corundum power module is separated from the aluminium collection module by the slab from fire-resistant, non-conductive material, for example, silicon carbide or aluminium nitride. The bipolar electrodes can be installed at the angle to the vertical not more than 10°. The end faces of the bipolar electrodes from the corundum power module side are protected by the coating from refractory, non-conductive material, for example, silicon carbide or aluminium nitride.EFFECT: improvement of the bipolar electrodes with corundum supply, reduction of the dissolution rate of the electrodes anode part and the labour costs for maintaining the electrolytic cell, provision of the stable and long-term operation of bipolar electrodes and the production of commercial pureness aluminium.4 cl, 1 dwg

Electrolysis cathode // 2621029
FIELD: electricity.SUBSTANCE: invention refers to the electrolysis cathode, containing nickel coating with thickness 300-1000 nm, applied by the method of magnetron spraying on the matrix of porous aluminium oxide with pores sizes of 40-120 nm and the distance between the pores walls 10-20 nm.EFFECT: increase of the contact area of the cathode material with the electrolyte and increase of the catalytic coating adhesion to the substrate, otherwise to the cathode base.2 dwg

Device for permanent fixing of metal insert // 2620941
FIELD: mechanics.SUBSTANCE: invention relates to the element (10), including the base (11), having at least one recess, forming the shaped cavity for the sign and completely filled with galvanically deposited layer (16), so that the element (10) is the incrusted at least by one metal sign with improved visual quality. The element (10) contains the device for permanent fixing of indicated at least one metal sign, which is at least one through-hole (14) in the element (10) and at least partially filled with the galvanically deposited layer (16) for improving fixation at least one sign to the element. The indicated through-hole (14) has the first end, communicated with at least one recess and the second end, communicating with the other side of the mentioned base.EFFECT: reliability increase of the signs fixation.23 cl, 11 dwg

ethod of forming coloured decorative coating by anodisation // 2620801
FIELD: chemistry.SUBSTANCE: method of obtaining a decorative coating with a changing colour during visual angle variation consists in the formation of one-dimensional photonic crystal with photonic bandgap in the visible range by anodising the surface of a valve metal or its alloy containing not less than 50% of valve metal at a cyclically varying parameters: current and voltage, wherein each cycle consists of two stages: anodization is carried out at the first stage at current stabilization in the range of 0.1 to 50 mA /cm2 for a time ensuring charge flow from 0.05 to 5 C/cm2; anodization is carried out at the second stage at voltage stabilization, increasing it from the voltage value at the end of the first stage to a value lying in the range from 10 to 200 V, with a decreasing voltage rise rate from 5 V/s to 0 V/s, and is held at this value for a time ensuring charge flow from 0.05 to 5 C/cm2, ensuring more than 1.4 ratio ofmaximal voltage at the second stage to minimal voltage at the first stage, wherein metal surface serves as anode during production of the decorative coating, and inert material is used as cathode, wherein anodisation charge is reduced by 0.01-10% at the first and the second stages at every next anodisation cycle, which amount lies in the range from 20 to 300.EFFECT: invention allows to obtain coloured decorative coatings of high quality using simple and reproducible method characterized by safety and environmental friendliness due to elimination of toxic substances from the technology.9 cl, 10 dwg, 2 tbl, 5 ex

ethod and device for nitrogening the textured sheet from electrotechnical steel // 2620403
FIELD: metallurgy.SUBSTANCE: band is immersed for a period of 5 s to 1000 s or from 3 s to 300 s in a molten bath with a bath heating regulation of 400°C to 700°C while maintaining the set temperature. Mentioned device comprises a container for containing a bath with the molten salt, temperature control device for the heating of said bath with the molten salt to a predetermined temperature and maintaining said bath with the molten salt at a predetermined temperature and at least one guide roller for maintaining said strip extending inside the bath with mentioned molten salt. In another embodiment, the device comprises a container for containing a bath with the molten salt, temperature control device for the heating of mentioned bath with the molten salt to a predetermined temperature and maintaining the bath with the molten salt at a predetermined temperature, a guide roller for maintaining the strip passing inside mentioned bath with the molten salt, and at least one counter electrode between which and mentioned band voltage is applied for electrolytic nitriding said strip.EFFECT: obtaining permanent magnetic properties and the hardening of the surface layers of the textured sheet of electrical steel.13 cl, 7 dwg, 2 tbl, ex 2

Electrolytic cell for manufacturing rare-earth metals // 2620319
FIELD: chemistry.SUBSTANCE: electrolytic cell comprises a housing formed with one or more oblique channels in the housing bottom for draining molten rare earth metals. One or more cathodes are suspended in the cell housing in vertical alignment with one or more channels. The respective cathodes of the opposed surfaces are inclined downwardly and outwardly at an angle from the vertical. One or more pairs of anodes suspended in the cell body. Each anode in one or more pairs has a front surface, the deviation from the vertical and spaced apart in parallel alignment with the respective opposite inclined surfaces of one or more cathodes. The electrolytic cell also includes a collection for the reception of molten rare earth metals from the channel. Separation of molten rare earth metals from the cathode (s) and anode (s) prevents contamination of volatile carbon, rising from the anode (s), or the reverse reaction with the exhaust gases.EFFECT: increased efficiency of energy consumption and the reduction of product contamination.13 cl, 2 dwg

ethod of obtaining protective coating on magnesium and its alloys // 2620224
FIELD: metallurgy.SUBSTANCE: method includes three stages: in the first step on the substrate forming a primary coating thickness of at least 15 microns, which is obtained substrate MAO in an aqueous electrolyte containing from 10 to 40 g/l of alkali metal metasilicate, 2 to 10 g/l fluorides of alkali metals and from 3 to 15 g/l of alkali metal hydroxides, for a pulse current with an amplitude of 400-450 V, 250-350 ms pulse duration, the second step is carried out first chemical bleed coating in an aqueous solution containing from 0.5 to 1.5 mol/l phosphoric acid, 0.5 to 1.5 m l/l hydrogen fluoride or fluoride, is then formed on the substrate with a secondary coating using an electrolyte and MAO mode of the first stage, after which the second chemical is carried bleed coating in an aqueous solution of the first etching, and in the third stage, an electrolyte and a first-stage MDO are used, with the formation of a final nanostructured non-metallic inorganic protective coating on the substrate.EFFECT: increasing the adhesion strength of the coating to the substrate, corrosion resistance and resistance to external factors, primarily external mechanical influences.4 cl, 2 dwg, 1 tbl
ethod of electrolytic deposition of corrosion-resistant antifriction coatings by the copper alloy // 2620215
FIELD: metallurgy.SUBSTANCE: method includes the electrolytic deposition of antifriction coatings from a tin-based alloy in an electrolyte containing, g/l: tin (II) borftoride 10-40, copper (II) borftoride 10-25, antimony (III) borofluoride 5-10, cadmium Borftoristy 5-15, zinc (II) borftoristy 5-15, indium (III) borftoristy 2-5, silver (I) borftoriste 0.5-1.5, boron hydrofluoric acid 105-130, boric acid 50-100, antioxidant 1,5-5, surfactant 7-20, with a cathode current density of 2.0-5.0 A/dm2 and the temperature of electrolyte 18-25°C.EFFECT: increase of abrasive and corrosion resistance, strength of coatings in corrosive media, reduction of coefficient of friction, increase of hardness, wear resistance and thermal stability of coatings, while increasing plasticity.3 cl, 2 tbl
ethod of electrolytic deposition of corrosion-resistant antifriction coatings by the copper alloy // 2619012
FIELD: metallurgy.SUBSTANCE: method includes electrolytic coating deposition in electrolyte containing, g/l: copper (II) borofluoride (in terms of metal) 55-70, tin (II) borftluoride (in terms of metal) 40-45, boron fluoride 110- 200, boric acid 40-100, antioxidant 4-10, surfactant 0.5-2.5, at a cathode current density of 2.0-10.0 A/dm2 and electrolyte temperature 18-25°C.EFFECT: increased abrasion and corrosion resistance of the coating under conditions of fretting corrosion, reduced friction coefficient, increased hardness, wear resistance and thermal stability of the coating.3 cl, 2 tbl
ethod of obtaining the coordination connection of zinc with nicotine acid // 2618533
FIELD: chemistry.SUBSTANCE: invention relates to a process for preparing nicotinate hydrate of zinc by electrolysis of aqueous organic solution of nicotinic acid with zinc electrodes at a constant current, comprising separating the resulting precipitate, washing the precipitate and drying it. The mass ratio of acetonitrile: ethanol: water: nicotinic acid: electrolyte is 55.13:19.73:5.00: 1.00:0.05, the electric current density is 3-5 mA/cm2.EFFECT: invention simplifies the process for preparing the zinc complex compound with nicotinic acid and simultaneously reduce the time required.3 tbl, 1 ex
ethod of clarification and decolorization of natural waters and device for its implementation // 2618076
FIELD: chemistry.SUBSTANCE: clarification and decolorization of natural waters is carried out with the help of water intake and cleaning device. Physical treatment is carried out in working closed electrocoagulation chambers 7 by exposing the treated water to a constant electric field at potential gradients ranging from 4 V/cm to 8 V/cm, the distance between the annular non-polarizable electrodes 8 located at the bottom of each chamber from 1 cm before 2 centimeters. At the bottom of a plate, and on top of the cathode. At the signal the control unit 1 includes a constant current source 3 which supplies the ring 8 nonpolarizable electrodes a potential difference with the initial potential gradient 8 V/cm. Then, the supply of the potential difference. Water is supplied to filtration chamber 10. Include a submersible motor 13 and the electric valve 5 is opened to the pump string 14 by monitoring sensor 4 the purified water flow. At the signal the control unit 1 produces water sampling using the sampling device 22 and determining the zeta potential of the slurry, turbidity and colour of water purified water quality control unit 2 connected to the control unit 1. If any of these parameters does not meet the requirements of production schedules, perform a gradual reduction potential gradient at 0.5 V/cm to 4 V/cm while decreasing the flow by reducing the opening of the valve and connect the unused working electrocoagulation chambers. While improving the turbidity of purified water and chrominance indices valve is gradually opened until the starting position. If the required result for turbidity and colour can not be provided, the residence time of the treated water in the electrocoagulation chambers is increased consecutively by connecting the reserve chambers.EFFECT: invention allows to increase the reliability of water treatment processes, to provide a system of flexible management, safety of drinking water, the compactness of the equipment and reduction in construction and operating costs.2 cl, 2 dwg, 5 tbl
Coating/hermetics systems, water resistant dispersions, ways of producing water smooth dispersions and methods of electro paint // 2618026
FIELD: chemistry.SUBSTANCE: aqueous resinous dispersion comprises sulfur-functional azole-containing phosphated polyepoxy resin. Sulfur-functional azole is tetrazole, mercaptoarylimidazole, mercaptoaryloxazole and/or mercaptoarylthiazole.EFFECT: invention makes it possible to obtain electrodeposited coatings from phosphated polyepoxide resins having improved adhesion to the surface and meeting the requirements of aerospace sealants.17 cl, 6 tbl, 16 ex
Nickel and/or chromium-plated element and method for its production // 2618017
FIELD: metallurgy.SUBSTANCE: multi-coated element includes a substrate, pre-treatment coating layer that has a layer of chemical nickel plating and a nickel layer and applied to the entire substrate, where there is formed a coppering layer and a functional layer, formed on the coppering layer, while the functional layer has a nickel layer with low potential, which includes one of the following: a layer of high sulfur nickel and a nickel layer with micro-cracks or an integrated cover layer from the layer of high sulfur nickel with a layer with micro-cracks, and a microporous nickel layer formed on the layer of nickel with low potential.EFFECT: significant increase in corrosion resistance and stability of the entire element, providing good uniform gloss and coating layers bonding effect.14 cl, 24 tbl, 19 dwg

ethod of internal stress relieving in polymer coatings // 2617780
FIELD: chemistry.SUBSTANCE: method of internal stress relieving of lacquer coatings on metallic surfaces formed by liquid coating materials - acrylic, polyurethane or pentaphtol. The method comprises impact of constant electric field formed by aeroionizational electroeffluvial unit with intensity of E= (1.2÷6)⋅105 V/m on the lacquer coating at a voltage of (2-2.5)⋅104 B at high-voltage generator of the unit. The distance between the electroeffluvial radiator of the unit and the lacquer coating is 0.04-0.2 m.EFFECT: reduction of shrinkage stresses in the coating and acceleration of coating curing or drying in 1,5-2 times while maintaining the physical and mechanical properties of the coating compared to the natural conditions.3 dwg, 4 tbl
 
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