Electrolytic or electrophoretic processes and apparatus therefor (C25)

C   Chemistry; metallurgy(313007)
C25            Electrolytic or electrophoretic processes; apparatus therefor(12232)
ethod for samarium and cobalt intermetallic compounds powders production // 2615668
FIELD: chemistry.SUBSTANCE: samarium and cobalt intermetallic compounds powder is obtained. Electrolysis of a molten salt, comprising an eutectic mixture of lithium and potassium chlorides, cobalt dichloride and samarium trichloride is performed in a three-electrode quartz cell containing a tungsten or molybdenum wire cathode, a silver reference electrode and an anode as a glassy carbon cylinder, at a temperature of 500-650°C and potential of minus 1700 mV to minus 1800 mV with respect to the silver reference electrode.EFFECT: lower working electrolytic temperature and obtaining of samarium and cobalt intermetallic compound powder.3 ex

ethod for producing highly dispersed aluminium-zirconium oxide system // 2615513
FIELD: chemistry.SUBSTANCE: method involves anodic dissolving the metallic aluminium in the sodium chloride solution with the concentrationof 29±0.5 g/l in a coaxial electrolytic cell with electrode areas differing on two or more orders with the anodic current density of 20-160 A/m2 in the presence of zirconium ions in an amount providing the zirconium oxide content in the formed precipitate from 5 to 20 wt %, maintaining the resulting precipitate in the mother liquor for at least 48 hours, filtering and drying the sediment.EFFECT: method allows to obtain highly dispersed aluminium-zirconium oxide systems with an average particle size of 20-50 nm, which can be used for producing ceramics of special purpose.2 cl, 1 dwg, 1 ex, 1 tbl

Protection procedure for baked anode of aluminium electrolyzer // 2615389
FIELD: metallurgy.SUBSTANCE: method includes charging covering material on the anode side facing the deckplate of the electrolyzer cathode device in two stages, where the first layer of the covering material is loaded onto a recess made in the anode at the height h above the base and the width B equal to 0.05-0.1 length L of carbon anode block to form angle α1, equal to 37-42° between the upper boundary of the covering material and the horizontal plane, and after sintering the covering material and the solid skin formation on its surface the second layer of the covering material is loaded up to the height H-h to form an angle α2 equal to 55-60° between the top boundary of the covering material and the horizontal plane, where H is the height of the anode, h is the height of the anode from its base to the recess.EFFECT: upgraded protection of the anode.1 dwg
ethod of producing perfluoro-3-methoxypropionyl fluoride // 2615148
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing perfluoro-3-methoxypropionyl fluoride which is the initial product of perfluoro-3-methoxypropyl vinyl ester (monomer M-60MP) production, which provides increased frost resistance to its copolymers-fluororubbers due to the decrease of their glass transition temperature. The method consists in the electrochemical fluorination of methyl 3-methoxytetrafluorinepropionate in liquid anhydrous hydrogen fluoride, wherein triallylamine is used as the electrolyte additive in an amount from 1.0 to 10.0 wt % of the total electrolyte weight.EFFECT: method enables to obtain the end product with 60-65 percents of current output.1 tbl, 3 ex

Device for application of metal film and method of application of metal film // 2615009
FIELD: metal industry.SUBSTANCE: invention refers to the application of metal films to the surface of a conducting layer with a pattern created on a polymer substrate. The device for application of a metal film includes an anode, a polymer substrate with a surface, on which a conducting layer and a pattern playing the role of a cathode is created, a solid electrolyte membrane containing metal ions and located between the anode and the polymer substrate, moreover, the solid electrolyte membrane is in contact with the surface of the conducting layer with the pattern during formation of a metal film, a power unit, and an electrically-conducting component located in contact with the conducting layer with the pattern during formation of a metal film so that the negative electrode of the power unit is electrically connected to the conducting layer with the pattern, moreover, the electrically-conducting component is performed with the possibility of disconnection from the conducting layer with the pattern, whereupon, metal ions are restored for deposition of metal forming a metal film on the surface of the conducting layer with the pattern after delivery of electrical potential.EFFECT: invention provides the possibility of formation of a metal film without formation of unnecessary conducting areas on the substrate.8 cl, 10 dwg, 3 ex

ethod for protective composite coatings production on magnesium alloy // 2614917
FIELD: chemistry.SUBSTANCE: method comprises plasma electrolytic oxidation (PEO) of the alloy surface in silicate-fluoride electrolyte in a bipolar mode, in two steps. During the first 200-240 s of alloy surface anodic polarization, process is performed galvanostatically at a current density of 0.5-0.7 A/cm2, until the anode voltage reaches 250-270 V, and during cathodic polarization, - potentiostatically at a cathode voltage of -(30-40) V. Then, during 600-700 s, oxidation is continued at an anode voltage, decreasing to 200-210 V, and cathode voltage - to -(8-10) V. A fluoropolymer layer is applied to the formed substrate surface by dipping into a tetrafluoroethylene telomers solution in acetone, followed by coating drying and heat-treating the at 250-275°C for at least one hour. Fluoropolymer coating is repeated 2-3 times.EFFECT: increased method technology at increased service life and improved corrosion resistance, anti-friction and hydrophobic properties of coatings.3 cl, 2 dwg, 3 tbl, 4 ex
ethod for bismuth titanate thin layers production // 2614916
FIELD: chemistry.SUBSTANCE: method relates to the technology of ferroelectric coatings manufacturing on conductive surfaces, in particular, thin layers of bismuth titanate on titanium, and can be used to create dielectric layers as a photorefractive material in devices for data recording and processing, in thin film capacitors, for piezoelectric ceramic manufacture, etc. The method comprises titanium product surface treatment by plasma electrolytic oxidation in an electrolyte containing 0.1-0.2 M of Na2B4O7 tetraborate in galvanostatic mode at anode polarization for 10-15 minutes at an effective current density of 0.20-0.25 A/cm2 to form a titanium oxide layer, which is then impregnated with a solution of primary bismuth nitrate with molten rosin, turpentine diluted, and calcined at a temperature of 650-700°C for 0.5-1.0 hours to provide a thin layer containing Bi4Ti3O12.EFFECT: simplified method technological scheme and reduced time spent on its implementation.2cl, 3 dwg, 2 tbl, 2 ex

Solution for metal film formation and for metal film formation // 2614655
FIELD: chemistry.SUBSTANCE: solution to form a metal film for metal ions supply to a solid electrolyte membrane during film formation is proposed. At that, during film formation, the solid electrolyte membrane is located between the anode and the substrate as the cathode and the solid electrolyte membrane is brought into contact with the substrate, and voltage is applied between the anode and the substrate for metal deposition on the substrate surface of metal ions contained in the solid electrolyte membrane, wherein the metal film is formed on the substrate surface. The solution for metal film formation comprises a solvent and a metal, dissolved to the ionic state. Concentration of film-forming metal hydrogen ions is within the range of 0 to 10-7.85 mol/l at 25°C. The solvent is an alcohol solvent comprising at least one component selected from methanol, ethanol and propanol, or a solvent containing this alcohol solvent and water.EFFECT: invention provides a solution for metal film formation, where hydrogen gas generation between the solid electrolyte membrane and the substrate is suppressed.4 cl, 4 dwg

Electrochemical module cell for treatment of electrolyte solutions // 2614450
FIELD: electricity.SUBSTANCE: through two coaxial orifices are separated by three electrodes, which have a polarity at which the middle electrode is the counter electrode with respect to the outer and inner electrode, the outer electrode is the housing of the cell.EFFECT: use of the invention allows more efficient use of space coaxially arranged cylindrical surfaces of the electrodes, thus enhancing productivity per unit volume of the reactor, to increase reliability and compactness of the cell facilitate the possibility of combining the electrochemical reactor cells in a higher productivity.3 dwg
ethod for obtaining coal pitch-bonding agent for production of anode mass of carbon electrodes // 2614445
FIELD: chemistry.SUBSTANCE: invention refers to the field of coal chemistry, to technology for hydrocarbon extraction from coal and may be used in the manufacture of electrodes for electrolysis aluminum production. A method for obtaining coal pitch - bonding agent for the production of anode mass of carbon electrodes includes thermal dissolution of finely ground coal in organic solvent under increased pressure, subsequent filtration and distillation of the pitch-containing product; the method is characterized by the fact that ashfree pitch-containing product is obtained in filtration process, distillation is carried out in the mode of fraction distillation or rectification of ashfree pitch-containing product, coal pitch - bonding agent is isolated in the form of a high-boiling fraction initial boiling temperature of which being 350-380°C.EFFECT: use in the anode mass composition, eg, in self-burning anodes in aluminum electrolyzers.3 cl, 3 tbl

Lining method for cathode assembly of electrolyzer for primary aluminium production (versions) // 2614357
FIELD: metallurgy.SUBSTANCE: method includes filling the cathode assembly casing with heat insulation layer, building up a refractory layer, followed by packing layers, installing hearth and side blocks, followed by sealing the joints between them with cold ramming paste. In accordance with the first alternative of the presented method an elastic element made of compact fibreboard with the thickness of (2.5-4)⋅10-4 of the cathode width is installed between the heat insulation and refractory layers. According to the second alternative of the presented method flexible graphite foil is installed between the heat insulation and refractory layers and an elastic element of the abovementioned fibreboard is mounted beneath it.EFFECT: reduced power consumption during the electrolyzer operation by improving the stabilization of the thermal properties of the heat insulation in the basement, extended life of electrolyzers.6 cl, 5 dwg, 1 tbl
ethod for current lead to aluminium electrolyser device with self-burning anode and upper current lead // 2613839
FIELD: electricity.SUBSTANCE: method involves the removal of the current supply pins of internal rows during the technological support on the electrolyser, in the projection of which the most developed fractures, holes and cavities are represented, to achieving the ratio of the pins number in the internal and external rows (0.98…0.88): 1. Said pins are not installed in the future.EFFECT: improving the electrolyser performance due to reducing the losses from the reverse oxidation of the aluminium produced by means of the interpolar gap stabilization and the reduction of energy consumption and labour costs for the electrolyser maintenance.1 dwg, 1 tbl
Oxalate electrolyte for copper-tin alloy deposition // 2613838
FIELD: chemistry.SUBSTANCE: electrolyte comprises, mol/l: copper sulfate pentahydrate (8-10)10-2, tin sulfate (1-5)10-2, ammonium oxalate (3-4)10-1, sodium acetate (1.81-2.00)10-1, Gelatin (1-5)10-6, vanillin (1-5)10-3 in the presence of (5-100)10-5 of environmentally friendly ethylene diamine disuccinic acid chelating agent.EFFECT: exclusion of environmental pollution, provision of a uniform delivery of the deposited copper and tin during electrolysis from the corresponding stable copper and tin complexes with ethylene diamine disuccinic acid to provide brilliant mirror-quality coatings firmly adhered to the substrate.1 tbl, 3 ex

Zinc alloy electroplating method // 2613826
FIELD: chemistry.SUBSTANCE: method for zinc alloy electrolytic deposition in the alkaline bath comprises current supply through the alkaline bath for electrolytic deposition of zinc alloy containing a cathode and an anode. The cathode region comprising a cathode and the anode region comprising an anode, are separated by a separator comprising an electrically conductive electrolyte gel. The catholyte contained in the cathode region is an alkaline electrolyte for electrodeposition of the zinc-nickel alloy containing an amine based chelating agent, and the anolyte contained in the anode region, is an aqueous alkaline solution.EFFECT: extended electrolyte life, while maintaining its characteristics.22 cl, 1 tbl, 3 ex, 7 dwg

Antiviral aluminium device and method for its producing // 2613820
FIELD: physics.SUBSTANCE: aluminium antiviral device, capable to inactivate the virus, contains the anode oxide film, obtained by anodizing of an aluminium material, and has pores, inside which there is an antiviral inorganic compound. On the surface of the film with an antiviral compound, the surface film is formed, which contains an antiviral inorganic compound and the binder on the base of resin . The method comprises anodizing of the aluminium material with the formation of pores, the deposition of the antiviral compound in the pores by the electrochemical treatment, wherein the deposition step of antiviral inorganic compound comprises depositing at least one of the elements such as Ag and Cu, in the pores by the electrochemical treatment, immersing the material into the electrolyte with ions of iodine and CuI or AgI deposition- antiviral compound in the pores by the electrochemical treatment. The device is able to deactivate viruses within a short period of time.EFFECT: invention relates to the field of electroplating and can be used to produce an antiviral devices.24 cl, 4 dwg, 2 tbl, 15 ex

Piston ring with chromium and solid particles layer to protect from wear and corrsion resistant side face // 2613819
FIELD: machine engineering.SUBSTANCE: piston ring contains a major part of the chromium steel with more than 10% by the chromium weight, having the inner peripheral surface, the first side surface, the second side surface and the outer peripheral surface. At the first side surface it contains the nitrided diffusion layer with thickness of 5-300 micron, the nitrided bond layer with thickness of 0.5-15 microns located directly above it, and the oxide layer with thickness of 0.05-3 microns located directly above it. On the second side surface it contains a nitrided diffusion layer. On the outer peripheral surface it contains the nitrided diffusion layer and the chromium and solid particles layer located above it, wherein the solid particles volume content is 0.1-30% relatively to the total volume of the indicated layer. The method of the indicated piston ring manufacture, wherein the metal major part of the piston ring, having the inner peripheral surface, the first side surface, the second side surface and the outer peripheral surface, is subjected to a combined process of nitration-oxidation in the atmosphere, containing at least one nitrogen compound, with heating at least up to 300°C. Then the air is supplied and the piston ring is cooled in the air presence. As a result, the nitrided diffusion layer, located above it the nitrided bond layer, and located above it the oxide layer is obtained at least at the first side surface, the second side surface and the outer peripheral surface. The piston ring is placed into the aqueous electrolyte, containing chromium in the ionic form and the solid particles, and the layer of chromium and mentioned solid particles is electrochemically deposited at least to the outer peripheral surface.EFFECT: obtaining the piston ring with high wear-resistant outer peripheral surface and the side surface, which has both high hardness and high corrosion resistance.15 cl 3 dwg
Composition and method for production of thermally-conductive metal polymeric coatings with increased hardness by cathodic electrodeposition // 2613798
FIELD: chemistry.SUBSTANCE: invention can be used for production of thin-film thermally-conductive coatings with high hardness using the cathodic electrodeposition method. The composition comprises, weight parts: polymer electrolyte - toluene diisocyanate modified epoxyamine adduct with a molecular weight of 1700-2500 amu and 36-38% of solids - 100; acetic acid (100%) - 0.4-0.5; copper acetate (100%) - 2.2-3.3; water - the rest up to 1 liter. The method involves electrodeposition of polymer electrolyte together with copper electrolytic reduction on the cathode from the said composition in the direct current mode under the following conditions: U=140-200 V; duration of application is 100-160 seconds; pH=4.3-5.6; temperature is 25-32°C.EFFECT: increased hardness, thermal conductivity, and impact resistance of the coating.2 cl, 2 tbl
ethod of making copper coatings with developed surface // 2613553
FIELD: metallurgy.SUBSTANCE: electrodeposition process is carried out using mechanical activation of the cathode from sulfuric acid electrolyte with the addition of activator particles inert to the electrolyte in the form of powder with the fraction of 10-30 microns at the concentration of 20-50 g/l, the electrolyte is carefully mixed with the activator mechanically or by air prior to the electrodeposition, then the mixing is stopped and the process of copper electrocrystallisation or electrodeposition is started. The process is performed with intermittent mixing of the activator with the electrolyte in a potentiostatic mode at 50-200 mV overvoltage for 10-20 minutes.EFFECT: invention provides the ability to create copper defect crystals, coatings and layers thereof having a developed surface.6 cl, 8 ex, 3 dwg

icro-arc oxidation device // 2613250
FIELD: technological processes.SUBSTANCE: invention relates to coatings application electrochemical method and can be used in machine building and other industrial sectors. Device comprises power supply source, connected to it power control unit, connected to bath with electrolyte with immersed into it part and measuring unit, wherein power unit includes control element providing voltage control, anode and cathode cycles beginning and end time and duration. Control element is made with possibility to supply pulses with gaps between them with duration from 80 mcs to 5 ms during anode and cathode cycles with adjustable frequency and duration pulses, wherein control element is used providing for voltage control with pulse-width and/or amplitude-width modulation.EFFECT: expansion of micro-arc oxidation technological capabilities, increasing coating adhesion to substrate, achieving high coating hardness with its controlled porosity.4 cl, 2 dwg

ethod for cleaning and regeneration of acidic chromate solutions and device forits implementation // 2612248
FIELD: electricity.SUBSTANCE: process of purification and recovery of acidic chromating solutions carried out at a constant current of 0.01-0.03 A, and a voltage of 0.5-1.5 V, with insoluble electrodes in the form of activated carbon with a particle size of from 0.5 to 2.0 mm. The electrode cell partition, which separates the anode chamber and the cathode, is made of an impermeable material and electrodes are used as filled in the anode compartment and the cathode at the height of 0.8-0.9 of the height of partitions activated carbon having a particle size of from 0.5 to 2.0 mm.EFFECT: invention enhances the degree of separation while reducing power consumption by providing a new mechanism for separating the plurality of ions on the surface of the active centers in the interelectrode space.3 cl, 1 ex, 2 dwg
ethod of producing copper galvanic coatings modified with nanoparticles of electro-erosion copper // 2612119
FIELD: technological processes.SUBSTANCE: invention relates to electroplating and can be used for modification of copper galvanic coatings. Method involves introduction in sulphate of copper plating electrolyte of copper nanoparticles obtained by dispersion of copper wastes with size of 2.5–100 nm with concentration up to 0.1 g per 100 ml of electrolyte.EFFECT: improved physical and mechanical characteristics of copper coating.1 cl, 3 tbl, 6 dwg, 1 ex

ethod of coating thickness determination during solid-state anodisation process // 2611632
FIELD: metallurgy.SUBSTANCE: invention refers to electroplating, namely to solid-state anodisation of aluminium alloys. Method of oxide coating thickness determination during solid-state anodisation of an aluminium alloy involves measurement of current density and anodisation time, as well as voltage at the electrolytic cell, calculation of specific energy consumption and coating thickness is calculated by the formula h=k⋅Q where Q is specific energy consumption, kW⋅h/dm2, t is anodisation time, h, J is current density, A/dm2, U is voltage at the electrolytic cell, V, h is coating thickness, µm, k is empirical factor defined by calibration h µm: Q, kW⋅h/dm2 curve for anodised aluminium alloy and electrolytic solution.EFFECT: improved precision of coating thickness determination.1 tbl, 3 ex, 8 dwg
ethod of producing copper-containing nano-catalysts with developed surface // 2611620
FIELD: technological processes.SUBSTANCE: invention relates to a method of producing copper-containing nano-catalysts with developed surface, which involves, that first from an electrolyte solution onto a metal carrier by electrodeposition copper is applied, then the carrier with the applied active metal is subjected to thermal processing. Electrodeposition process is performed in such a way, for to grow on a metal substrate with a heat conductivity coefficient less than 20 W/(m⋅K) a monolayer of icosahedral small particles of copper with micron sizes from 5 to 15 mcm and having 6 axes of symmetry of the 5th order, or layers of microcrystals with disclination type defects in the crystal lattice, then they are annealed in air atmosphere at the temperature of 300–400 °C and maintained for 4 hours till the small particles form a developed surface in the form of nanowhiskers or at the temperatures of 500–600 °C and maintained for 2–3 hours till the small particles form a developed surface in the form of nanopores, or inner cavities, or a corrugated relief.EFFECT: technical result is producing a nano-catalyst with high specific surface, good adhesion to a carrier, high mechanical strength and low hydrodynamic resistance.3 cl, 8 dwg
Zirconium pretreatment compositions containing molybdenum, associated methods for treating metal substrates, and related coated metal substrates // 2611610
FIELD: metal processing.SUBSTANCE: invention relates to treatment of metal substrates, such as cold-rolled steel, electrogalvanised steel or aluminium alloys. Pretreatment composition for treatment of metal substrate before application of coating comprises a Group IIIB and/or IVB Group metal, free fluoride, molybdenum and lithium, in which on molybdenum is in amount of 2 to 500 parts per million in terms of total weight of ingredients of pretreatment composition, wherein pretreatment composition in contact with substrate reacts with surface of substrate, chemically changes surface of substrate and binds to it with formation of a protective layer. Method of applying coating on a metal substrate includes pretreatment of metal substrate with pretreatment composition and electrophoretic deposition of a coating composition on metal substrate, wherein said coating composition contains yttrium.EFFECT: invention ensures production of corrosion-resistant coatings without use of phosphate- and/or chromate-containing compositions.42 cl, 4 tbl, 3 ex
ethod for processing wire for catalyst made of platinum group metals // 2611463
FIELD: electricity.SUBSTANCE: wire processing method for a catalyst, made of platinum group metal, is carried out by alternating current in an aqueous mineral acid at room temperature under a current density range 0.4-5.0 A / cm2 and AC frequency of 2-50 Hz.EFFECT: increase of the specific surface of the metal wire from the platinum group by carrying on its surface oxidation and reduction reactions.

Antiseptic preparation and method for obtaining thereof // 2611364
FIELD: medicine, pharmaceutics.SUBSTANCE: group of inventions relates to medicine, namely to industrial preparation of antiseptic preparation for medical purposes. Claimed is antiseptic preparation, which includes nanoparticles of tempered silver in amount from 0.01 to 0.05 wt %, base, represented by viscofluid substance and water in amount not more than 5 wt % of preparation weight. Also claimed is method of obtaining said antiseptic preparation in form of stable hydrosol based on distilled water. Obtained antiseptic preparation, containing dispersed silver nanoparticles, can be used in ophthalmology, ENT, dermatology, dentistry, surgery, urology, obstetrics and genecology, and combustiology.EFFECT: group of the inventions provides manufacturing and application of products for medical purposes in form of antiseptic hydrosol and gel-ointment preparation for processing respectively mucosal and skin surfaces of human body.5 cl, 2 dwg, 8 ex

Aluminium zinc plating // 2610811
FIELD: manufacturing technology.SUBSTANCE: invention relates to coin workpiece processing containing aluminium or aluminium alloy. Applying zinc coating first layer onto coin workpiece using immersion zinc plating in coatings application drum. Removing zinc coating first layer. Applying zinc coating second layer onto coin workpiece using immersion zinc plating in coatings application drum. Removing zinc coating second layer. Applying zinc coating third layer onto coin workpiece using immersion zinc plating in coatings application drum. Coating coin workpiece with one or more metal or metal alloys layers in absence of cyanide. Performing annealing to create metal diffusion between coin workpiece and one or more coating layers, in order to facilitate adhesion.EFFECT: result is durable and safe coins with multilayer coating.24 cl, 21 dwg, 6 tbl
Device for gas collection and removal from aluminium electrolytic cells of soderberg // 2610651
FIELD: metallurgy.SUBSTANCE: device includes gas collection bell with pipes installed at its long sides and in the corner part and interconnected by pipelines, and connected by via header to a case system of gas treatment by flue drains of electrolytic cell; and air feed orifices; height ratio of pipes at the long sides and in the corner part of gas collection bell is 1:(2-5). Orifices of air feed to combustion zone are made in the side walls of pipes at a height equal to at least a half of pipe base length.EFFECT: complete afterburning of anodic gases emitted under the device without intensive pipeline wear and blocking or anode burnout.8 cl, 5 dwg

Iron based electrolytic suspension for wear resistant coatings // 2610381
FIELD: chemistry.SUBSTANCE: invention relates to powder electrodeposition, i.e. to materials for composite electrodeposited coatings and can be used for mass, serial and custom production of wear resistant coatings. The iron based electrolytic suspension for wear resistant coatings contains aluminium oxide nanopowder in the form of dispersed spherical particles size 0,03 mkm or less and a concentration of 0.5-50 g/l, obtained by plasma recondensation aluminium oxide coarse powder.EFFECT: invention improves mechanical strength of the coatings, ie wear resistance, micro-hardness, and electrolyte sedimentation stability.1 tbl, 1 dwg

Electroplating with zinc alloy // 2610183
FIELD: physics.SUBSTANCE: invention relates to the field of electroplating. The method includes current supply through the alkaline bath for the electrolytic settling of the zinc alloy containing a cathode and an anode, wherein the cathode region, containing a cathode, and the anode region, containing an anode, are separated from each other by the anion-exchange membrane, the catholyte, contained in the cathode region, is an alkaline electrolyte for the electrolytic settling of the zinc alloy containing the amine-based chelating agent, and the anolyte, contained in the anode region, is an aqueous alkaline solution.EFFECT: increase of the electrolyte lifetime, while maintaining the characteristics of the created coatings.13 cl, 1 tbl, 5 dwg, 1 ex

Electrolyser for separation of fusible alloys by electrolysis in molten salts // 2610095
FIELD: chemistry.SUBSTANCE: electrolyser contains a bath, heated cathode and anode cavities separated and fixed by three vertical porous diaphragms impregnated with electrolyte. The anode cavity is formed by the diaphragm and the anode gasket made with a central partition having an U-shaped wall disposed therein, providing formation of the siphon windows in the bottom of the anode seal to overflow anode alloy, the anode gasket sidewall is provided with an inclined channel for flow of the anode alloy, and the cavities between anode and cathode are separated by spacers with the cutouts of the capillary channels of the siphon metals into the trap collections pressed against the bottom of the bath body.EFFECT: exclusion of semi-products oxidation with the active easily oxidized metals Sn, In, Ga due to their drain on the sealed capillary siphon channels in the sealed collections, increase in the yield of the concentrates with a reduction in maintenance costs.5 dwg
Zirconium pretreatment compositions containing lithium, associated methods for treating metal substrates, and related coated metal substrates // 2609585
FIELD: metal processing.SUBSTANCE: invention relates to pretreatment of metal substrates, such as cold rolled steel and electrogalvanised steel. Pretreatment composition for treatment of metal substrates includes a Group IIIB and/or Group IVB metal, free fluoride and lithium, in amount from 5 to 500 parts per million in terms of total weight of pretreatment composition, wherein molar ratio of Group IIIB and/or Group IVB metal to lithium ranges from 100:1 to 1:10, said pretreatment composition basically does not contain a resinous binder component and chromate. Methods include contacting metal substrate with a pretreatment composition.EFFECT: invention provides improved corrosion resistance of metal substrates without using chromates and/or phosphates.39 cl, 3 tbl, 2 ex

Primary aluminium production reduction cell cathode lining // 2608942
FIELD: metallurgy.SUBSTANCE: invention relates to aluminium production reduction cell cathode lining. Cathode lining comprises bottom and side units, interconnected by cold ramming paste, fire-resistant and heat-insulating layers from unshaped materials. Refractory layer is made from aluminosilicate material, a heat-insulating layer is from nongraphitic carbon or its mixture with aluminosilicate or alumina composition powder. Heat-insulation and refractory layers consist of, at least, two sublayers, wherein heat insulation and refractory layers porosity increases from top sublayer to bottom one, and ratio of thicknesses of refractory and heat-insulating layers is 1:(1-3).EFFECT: enabling reduced cyanide content in heat insulation top layers and providing conditions for repeated use of heat-insulating material.4 cl, 2 dwg

Device for producing aluminum hydroxide // 2608489
FIELD: chemistry.SUBSTANCE: present invention can be used in inorganic chemistry. Device for producing aluminum hydroxide comprises a vessel for electrolyte. Aluminum electrodes are placed in vessel, fixed on current-conducting elements, which are connected to power supply of electric current. Above vessel for electrolyte there is an exhaust hood. In lower wall of vessel for electrolyte there is an outlet, connected to inlet of a receptacle. Vessel for electrolyte and receptacle are made of organic polymer adapted for attaching a metal housing.EFFECT: invention reduces consumption of initial aluminum, increases safety of process of oxidation of aluminum, wherein content of non-oxidized aluminum and its impurities in product does not exceed 0,01 wt%.3 cl, 1 dwg, 1 ex
Versatile machine for loose materials transportation and loading into electrolytic cell // 2608013
FIELD: transportation.SUBSTANCE: invention relates to versatile machine for transportation and loading of loose materials into electrolytic cell. Machine comprises hopper with material lower level indicator sensor, mounted on self-propelled chassis with cabin, feeder and loading unit with possibility of stock loading into APF bin or directly on electrolyte crust. Loading on electrolyte crust unit is made in form of flexible pipe, installed in front of bin front section, with possibility of unloading end turning in vertical plane, and connected to feeder in form of air slide. Unit for material loading into APF bin is made in form of vertical auger with blades for raw material charge and discharge auger with loading neck, with raw material feeding into APF bin automatic tripping sensors. Loading neck is fixed on unloading auger via resilient element. Vertical auger is connected with air slide lower part and in upper part is with unloading auger. Unloading auger is installed with possibility of rotation relative to vertical auger in horizontal and vertical planes. In transport position unloading auger is directed along cabin side wall ahead of loading neck. In vertical auger upper part drive hydraulic motor is installed. Flexible pipe is connected with air slide via charging chamber. To unloading auger pipeline is connected with flexible inserts for air removal displaced from APF bin during raw material loading. In discharge chute lower part flexible aeration pipe is installed.EFFECT: enabling expansion of machine functional capabilities, simplifying its maintenance and provision of guaranteed raw materials supply into electrolytic cell.12 cl, 4 dwg
ethod for application of ceramic black coating on valve metals by microarc oxidation and coating obtained using said method // 2607875
FIELD: electricity; machine building; instrumentation.SUBSTANCE: proposed method comprises micro-arc oxidation products of valve metal and alloy in pulse anodic-cathodic mode in aqueous solution of electrolyte containing, g/l: natrium dihydrogen phosphate 10–30, natrium silicate 1–10, potassium cyanide 5–15, natrium molybdate 1–10. Ceramic coating optically black colour applied on the product and its alloy using the method described above, in the form of iron-containing layer with thickness of 5–60 mcm, additionally contains Si in amount of 0.2–13.0 wt% and Mo 0.1–7.0 wt%.EFFECT: higher wear resistance, corrosion resistance, degree of absorption, heat resistance and adhesion of the black coating.4 cl, 1 dwg, 5 ex

ethod of forming ceramic coating based on zirconium dioxide on article from titanium alloy // 2607390
FIELD: technological processes.SUBSTANCE: invention relates to production of ceramic coatings by electroplasma sputtering on articles from titanium alloys and can be used in instrument-making and machine building, in particular, in parts of compressors and turbines of gas-turbine engines, implanted medical structures. Method of forming a ceramic coating based on zirconium dioxide on an article from a titanium alloy includes electroplasma sputtering a dioxide-based coating and its modification by micro-arc oxidation in an aqueous alkaline electrolyte based on sodium hydroxide with the concentration of 1–3 g/l in the anode mode at the constant current density of (2–2.5)×103 A/m2 for 20–30 minutes.EFFECT: technical result is improved adhesion and microhardness of the coating based on zirconium dioxide.1 cl, 2 dwg, 2 tbl, 1 ex

Dry cell start-up of electrolytic cell for aluminium production // 2607308
FIELD: metallurgy.SUBSTANCE: invention relates to a method for starting up an electrolytic cell for aluminium production, electrolytic cell having a cathode block with an upper surface. Disclosed method comprises disposing contact resistance material on said upper surface of cathode block, lowering a plurality of anodes to abut contact resistance material, filling electrolytic cell to a height covering anodes with solid electrolyte material, containing crushed electrolytic bath material, cryolite, or mixtures thereof, delivering electrical current to anodes to at least partially melt solid electrolyte material and raising anodes when a predetermined depth of molten electrolyte material has been reached.EFFECT: reduced operating load on crane and possibility of doubling number of electrolytic cells, launched during a given period of time.15 cl, 2 tbl, 6 dwg

ethod of multilayer structure renewal // 2607212
FIELD: materials.SUBSTANCE: invention relates to protective layer applied on substrate nondestructive renewal method. Proposed method comprises electrochemical recovery of thermally grown oxide layer, located above substrate and protective layer. Recovery is performed under electrochemical conditions by applying external voltage to thermally grown oxide layer at temperature of at least 250 °C.EFFECT: invention provides possibility to perform renewal at local sections of protective coating, without part or other device removal from engine, to minimize downtime and excess wastes.10 cl, 4 dwg, 1 ex
Anodizing electrolyte for parts of aluminium or its alloy modified with nanocarbon // 2607075
FIELD: nanotechnology.SUBSTANCE: invention relates to electroplating and nanotechnology. Electrolyte contains sulfuric acid, composition “ECOMET-A200” and powder of carbon nanomaterial “Taunit” introduced by means of ultrasound disperser, wherein it contains components with following ratio, g/l: sulfuric acid 180–220, composition “ECOMET-A200” 26–28, carbon nanomaterial “Taunit” from 0.005 to less than 0.03.EFFECT: technical result is simplification of technology of increase of microhardness of aluminium surfaces.1 cl, 2 tbl, 1 ex

Galvanic bath with drain pocket // 2607057
FIELD: technological processes.SUBSTANCE: invention relates to electroplating and can be used for galvanic, chemical treatment and washing of parts. Bath comprises a reservoir of rectangular shape, consisting of a bottom, side and end walls with horizontal sides along perimeter of reservoir, one of walls of which in upper part is detachably connected with a drain pocket equipped with a drain pipe. Wall of reservoir with pocket has in upper part a drain screen having on end sides protective shoulders, permanently connected with horizontal sides and reservoir wall. Wall of pocket adjoining reservoir wall is made with a slot having length greater than that of screen with shoulders, and slot and end surface of slot, depending on shape of lower part of shoulders, are respectively made with skew or without it and/or with through slots for coupling with end surface of screens. End surface of rest of walls of pocket is aligned with lower surface of horizontal side of reservoir, and pocket is made of material resistant to temperature and/or aggressive medium.EFFECT: simplified design of a bath with a pocket, broader functional capabilities and higher unification of design solutions.7 cl, 9 dwg
Titanium diboride granules as cathode protection against erosion // 2606483
FIELD: chemistry.SUBSTANCE: invention relates to granules of titanium diboride, used for coating graphite cathodes in electrolytic cells in production of aluminium by electrolysis of molten medium and for repairing holes in cathode bottom of electrolytic cells. Titanium diboride granules have rounded shape, size in accordance with sieve number between 1 and 10 mm and compression strength of at least 5 N. Granules are obtained by mixing TiB2 powder with raw binder materials, preferably oxide, in form of aluminium compounds, obtaining raw workpieces and thermal treatment at temperatures of at least 800 °C.EFFECT: technical result of invention is improvement resistance of granules to wear and breakdown and improved protection of electrolysis cell against erosion wear.22 cl, 11 ex, 1 tbl
Electrically insulating lacquer // 2606445
FIELD: chemistry.SUBSTANCE: invention relates to electrically insulating lacquer, used for enamel coating of wires in electrical engineering, and, in particular, to lacquer based on polyesters. Electrically insulating lacquer contains, wt%: polyglyceroethylene terephthalate resin 46.0–48.0, polybutylene titanate solution in xylene 1.4–1.7, diethylene glycol 0.1–5.0, xylenol 51.6–53.0, solvent 9.3–19, and additionally dioxane 64–70 and ammonia 22–24.EFFECT: possibility of applying lacquer on metal base by electrodeposition, obtaining a uniform film of given thickness without use of leveling mechanical devices of all in one pass with minimum heat consumption during its heat treatment and more than 2-fold increase in electric strength of a film with similar thickness.1 cl

ethod of lining cathode device of electrolysis cell // 2606374
FIELD: chemistry.SUBSTANCE: invention relates to a method of lining a cathode device of an electrolyser for production of primary aluminium by electrolysis. Method involves loading a heat-insulating layer, consisting of non-graphitised carbon, in casing of cathode device, formation of a refractory layer of filling powder of aluminosilicate composition and compaction thereof by vibration compaction, installation of hearth and on-board units with further sealing of joints between them with cold-ramming paste. Heat-insulating material, consisting of non-graphitised carbon, is placed in cluster modules and is placed in base of electrolysis cell in at least one layer, and seams between them are sprinkled with non-graphitised carbon.EFFECT: reduced dust release during installation of cathode device, reduced power consumption during operation of electrolysis cell owing to optimisation of thermophysical properties of lining materials of base of electrolysis cell.4 cl, 1 dwg, 1 tbl
ethod of applying synthetic bioactive calcium-phosphate mineral complex on implants for medical purposes // 2606366
FIELD: medical equipment.SUBSTANCE: invention relates to a process for coatings on implants of various titanium alloys for trauma and orthopedic, neurosurgical, maxillofacial and dental operations. Method involves preparation of a saturated solution of synthetic bioactive calcium-phosphate mineral complex (SBCPMC) in 5–33 % orthophosphoric acid, containing calcium-phosphate base and an additional component, containing magnesium, binder with content of 5–25 wt% by weight over 100 %, fluorine as microelement and boron as ultra-microelement, at the following molar ratio: Ca:P:Mg:F:B = 1.67:1.0:1.2×10-2:1.1×10-4:1.0×10-6,and galvanic application of coating on said implant, immersed in a saturated solution SBCPMC, at voltage 80–400 V, pulse frequency 50–150 Hz, current density 0.2–1.0 A/mm2, processing time 5–60 min, pulse time 50–300 mcs, pH of electrolyte 6.5–8 and electrolyte temperature 5–85 °C, note here that after said treatment coated implant is washed with distilled water, dried at temperature 25–165 °C and annealed at temperature of 900–1,300 °C from 4 to 8 hours with formation of crystalline and/or coral structure of the coating with thickness up to 150 mcm.EFFECT: technical result: increasing of implant osteointegration.1 cl, 1 tbl, 3 ex

ethod for forming self-calcinating anode of aluminium electrolyser with upper current lead // 2606365
FIELD: chemistry.SUBSTANCE: invention relates to electrolytic production of aluminium, specifically to a method for forming self-calcinating anode of aluminium electrolyser with upper current lead. Method involves loading anode mass in anode casing, installation into liquid phase of anode along longitudinal axis of anode of electrolyzer partially buried, equal-height metal cooling elements, lifting anode casing, rearrangement of steel anode pins on a higher level of anode with extraction of steel rods from body of carbon anode, loading a dosed amount of pin mass and installation of pins in hole of anode, wherein loaded anode mass is based on oil coke with content of coal-tar pitch of 27÷29 %, installing horizontally oriented metal cooling elements in one line between central rows of anode pins at equal depth of immersion into liquid phase of anode, and lifting of anode casing is carried out with raising of metal cooling elements in a single step by not more than 3.0 cm.EFFECT: reduced consumption of anode mass, reduced output of coal froth, reduced electric power consumption and emissions of pollutants due to higher quality of anode.4 cl, 1 dwg, 2 tbl
ethod of protective coating producing // 2606364
FIELD: machine building.SUBSTANCE: invention relates to machine building, namely, to galvanic coatings producing methods with subsequent thermal treatment for corrosion protection of steel items. Method involves successive zinc layer electrolytic application on part, and then tin layer with subsequent thermal treatment of part, wherein on said tin layer zinc layer or zinc layer and subsequent tin layer are additionally applied, and part heat treatment is carried out in single stage at temperature of not less than for 18.5 °C below than zinc and tin eutectic melting temperature.EFFECT: technical result is improvement of coating protective ability and prevention of corrosion products formation.5 cl, 2 tbl, 1 dwg, 5 ex

Current contact jaw for aluminium electrolyzer and method of its producing // 2605885
FIELD: electrochemistry.SUBSTANCE: invention relates to current contact jaw of electrolyzer for aluminium production and method of its production. Current contact jaw contains aluminium rod and steel cross bar, connected by bimetallic connector, made by explosion welding, in the same time in the bimetallic adapter, having a flat interface section steel-aluminium, is made a conical-cylindrical hole in the central region, in which there is a steel rivet for enhancing metal compounds. Conical part [3] is located in the aluminium part of the adapter and by height coincides with its thickness, cylindrical - in steel, and by height coincides with its thickness, maximum diameter of the conical part of the rivet exceeds the diameter of its cylindrical part at 40-60 %. In method of making adapter includes step-by-step cladding steel with aluminium prior to connection of aluminium rod and steel cross bar and execution on the side of the steel part in the centre of the cylindrical hole at depth, equal to its thickness, and in the aluminium part axially is made taper hole, in the obtained conical-cylindrical hole placed steel rivet, aligned with it in shape and size, pressed and fixed at the end face of the cylindrical part.EFFECT: provides a simplified design of steel-aluminium adapter and manufacture of current contact jaw with simultaneous increasing of its reliability, service life and reduction of power losses.3 cl, 4 dwg

Installation method of headers with processing medium jet flows forming elements in galvanic baths of volumetric processing performed with heating // 2605882
FIELD: electroplating.SUBSTANCE: invention relates to electroplating and can be used in blasting baths making. Method involves following operations: feed pipes sections fixing on bath sides, connection of headers with processing medium jet flows forming elements to feed pipes sections via detachable couplings and connection of headers to each other by means of mounting-connecting elements, made in form of detachable or permanent connection, directly or through intermediate inserts with required height or elements with adjustable height of supports-clips with diameters, corresponding to diameters of corresponding headers pipes installed in them.EFFECT: technical result is reduction of bath overall dimensions, for volumetric made with heating, processing and labor costs, associated with installation of headers, expansion of functional and process capabilities, as well as increase in convenience and accuracy of headers installation, enabling real-time adjustment of their position, replacement and maintenance.5 cl, 20 dwg

Coating for turbine parts // 2605872
FIELD: technological processes.SUBSTANCE: invention relates to a coating for a turbine parts, namely, to a hydrophobic erosion-resistant coating applied on part of an axially rotating mechanism used under the action of gas saturated with water, and to application of this coating. Said coating has a metal matrix with a polysiloxane filler distributed in the coating thickness. After applying the said coating annealing of the filler is carried out ensuring high temperature stability of the polysiloxane filler.EFFECT: provided is the required balance of heat resistance and hydrophobic properties of the coating and increased is its service life.14 cl, 3 dwg