Electrolytic or electrophoretic processes and apparatus therefor (C25)

C   Chemistry; metallurgy(311501)
C25            Electrolytic or electrophoretic processes; apparatus therefor(12232)
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

Electrolytic cell // 2605751
FIELD: electrical engineering.SUBSTANCE: invention relates to electrolytic cell, comprising housing, in which installed titanium cathode, made of several perforated plates, together making annular cylinder with vertical openings between adjacent plates, insoluble anode in form of bent plates, together making annular cylinder, arranged coaxially relative to titanium cathode, as well as porous ceramic cylindrical diaphragm from corundum or stabilized zirconium dioxide with diameter of 350-500 mm, separating cathode and anode spaces.EFFECT: disclosed technical solution is aimed at simplification of electrolytic cell design and its components making processes, higher reliability during electrolysis in extreme conditions and higher efficiency of single unit.8 cl, 1 dwg

ethod for preparation of additive for electrolytes of cathodic electrodeposition of nickel coating and alloys thereof with cobalt and iron // 2605742
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry, particularly, to production of electrolytes for electrochemical nickel plating and production of alloys of nickel with cobalt and iron, which are widely used in machine building for production of medical and household appliances. Method involves reaction of 5,10,15,20-tetrakis(N-methylpyridyl-4′)porphin with nickel sulphate heptahydrate in molar ratio of 5,10,15,20-tetrakis(N-methylpyridyl-4′)porphin and nickel sulphate heptahydrate 1:1-1:1.2, pH 11.5-12.0 and temperature of 15-25 °C.EFFECT: technical result is reduced consumption of reagents, faster process of preparation and reduced temperature of process of preparing additive while maintaining quality of coatings.1 cl, 2 tbl, 3 ex

Electrolytic cell with fixed electrodes for electrochemical purification of waste water and obtaining several inorganic peroxide compounds // 2605084
FIELD: chemistry.SUBSTANCE: invention relates to electrolytic cell with fixed electrodes for electrochemical purification of waste water and obtaining several inorganic peroxide compounds, comprising coaxially installed cylindrical cathode and anode, separated by an ion-selective membrane. Anode is made of glass carbon grade SU-2000, cathode is made of nickel, wherein inside cathode there is process unit of a Ni gauze + coal-graphite fibre material-catalyst/sorbent, cathode is connected with bottom and cover, to form housing of electrolytic cell, at bottom of cathode space there are cermet dispersing elements.EFFECT: technical task of present invention is designing a universal electrolytic cell, making it possible to reduce energy consumption, material consumption and operating costs, as well as with high efficiency of not only purifying waste water with a wide range of contaminants, but obtain multiple inorganic peroxide compounds as well.5 cl, 1 dwg, 2 ex

Upper gas inlet purification system // 2605024
FIELD: processing and recycling wastes; metallurgy.SUBSTANCE: invention relates to upper gas inlet system for dry purification of flue gas of the electrolytic aluminum manufacturing. System comprises a dust remover, the bottom of which is communicated with a front collection pipe of the dust remover through an air-intake pipe of the dust remover, reactor, which is arranged at the air-intake pipe of the dust remover, alumina distributing device, which is arranged between the reactor and a fresh alumina storage cabin and communicated with the reactor through a distributing chute, alumina feeding device, which is arranged between the alumina distributing device and the fresh alumina storage cabin, fluorine-containing alumina storage cabin, return chute, material lifting device through a return chute, export collection pipe, chimney, air blower and exhaust pipe, upper part of the dust remover is communicated with an export collection pipe of the dust remover, and export collection pipe of the dust remover is communicated with a chimney through an air blower, pipeline is located below the dust remover, there is a return feeding tube connected to the alumina lifting device through the return chute and to the fluorine-containing alumina storage cabin.EFFECT: reduced capital investments, higher efficiency, reduced power consumption of the system.15 cl, 2 dwg

ethod of producing corrosion-resistant coating // 2604625
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry, specifically to electroplating. Method of producing corrosion-resistant coating on metal surface, mainly for friction contact surfaces of parts made from aluminium alloys involves preparation of surface: degreasing, etching, clarification; formation of anode film and its treatment with a fluorine-containing surfactant epilam. Treatment of anode film with surfactant is carried out in three layers, wherein method includes holding for 15-20 minutes after application of first and second layer, and after application of third layer, method includes temperature control of coating at a temperature of 115-125 °C for 60 minutes.EFFECT: technical result is improvement of tribotechnical properties due to three-layer application of surfactant of epilam type according to proposed technology.1 cl, 2 tbl, 1 dwg, 1 ex

Electrolytic generator purifying and degassing column // 2604616
FIELD: gas industry.SUBSTANCE: invention relates to purifier, which separates gases, produced in electrolytic generator from electrolyte contaminants, and also to electrolytic generator containing such purifier and method of gas purification. Gas purifier for electrolytic generator comprises reservoir for collection, input for purification intended to supply of two-phase fluid medium, containing gas to be purified into reservoir, plurality of washing trays, sprayer, made with possibility of flushing fluid distribution over plurality of washing trays, condenser for repeated liquefaction, including heat exchanger, in which refrigerant is circulating, and outlet for purification, intended for purified gas flow direction through plurality of washing trays and condenser.EFFECT: invention provides simple and effective gas purification.14 cl, 3 dwg

ethod of purifying nickel electrolyte from impurities of iron (iii) and copper (ii) by extraction with mixture of oleic acid and triethanolamine // 2604286
FIELD: chemistry.SUBSTANCE: invention relates to extraction of substances using organic extractants from aqueous solutions and can be used in non-ferrous and ferrous metallurgy, as well as for cleaning industrial and household wastes. Method involves treatment of electrolyte and extractant, contacting electrolyte and extractant, wherein selective extraction of Fe (III) and Cu (II) ions from nickel electrolyte with a mixture of oleic acid and triethanolamine is carried out in two steps: 1 step - extraction of Fe (III) at 3<pH≤4, ratio of volumes of aqueous B and organic O phase 1≤B:O≤4 and t 40 °C, 2 step - extraction of Cu (II) at 5≤pH≤6, 1≤B:O≤4 and t 40°C. Combined extraction of Fe (III) and Cu (II) ions from nickel electrolyte with a mixture of oleic acid and triethanolamine is carried out at pH 5-6, 1≤B:O≤4 and t 40 °C.EFFECT: method provides higher efficiency of selective and combined extraction of Fe (III) and Cu (II) ions from nickel electrolyte.2 cl, 2 tbl, 4 dwg

ethod of pore-free solid chromium-plating of articles of cast iron and steel // 2603935
FIELD: electroplating.SUBSTANCE: invention relates to application of galvanic coatings on articles made of cast iron and steel. Method involves successive deposition of layers of coating from electrolyte at direct current polarity, wherein article is heated and subjected to cathode treatment at cathodic current density of 100-150 A/dm2 and temperature of 70-75 °C in same bath at continuous circulation of electrolyte, at end of cathodic treatment current density is reduced to 32 A/dm2 and chromium-plating is continued until coating thickness reaches 8-10 mcm, then without current supply electrolyte is cooled to temperature of 45-50 °C by means of heat exchanger with cold water flow, and when specified temperature is achieved, article is subjected to minimum cathode current with gradual rise of density up to 45-50 A/dm2 and chromium-plating is performed up to required coating thickness. Chromium-plating process of any cast iron and steel including nitrated, is performed in electrolyte of one composition and in one bath without application of anode interlayer treatment.EFFECT: technical result is upgraded micro hardness - from 1,000 HV at satisfactory adhesion of coating.1 cl, 1 dwg

ethod of spent alkaline galvanic copper plating electrolyte regenerating // 2603933
FIELD: electroplating.SUBSTANCE: invention relates to electroplating and can be used for spent solutions regeneration. Method of galvanic copper plating spent alkaline electrolyte regenerating, containing of copper cations (II) complexes with ethylene diamine tetraacetic acid (EDTA), includes reduction of copper cations (II) into copper cations (I) during heating, removal of EDTA complexon from acid solution, wherein copper cations (II) reducing agent used is sodium thiosulphate, reduction process is carried out at pH = 5-6, heating to 90 °C for 15 minutes and molar ratio υ(Cu2+):υ(thiosulfate), equal to 1:1.05 and obtained copper sulphide (I) is annealed and dissolved in sulfuric acid to produce copper oxide (II).EFFECT: technical result is production waste water with concentration of copper cations (II) lower than MPC.1 cl, 1 tbl, 12 ex

Breathable electrode and method for use in water splitting // 2603772
FIELD: chemistry.SUBSTANCE: present invention relates to a water splitting cell, having at least one electrode comprising a porous membrane, wherein porous membrane is at least partially hydrophobic, and gas obtained on at least one electrode diffuses from cells through porous membrane. Invention also relates to methods of producing hydrogen, oxygen and splitting water.EFFECT: present invention increases efficiency of electrolytic reactions.25 cl, 1 tbl, 1 ex, 7 dwg

ethod of enamelled wires making // 2603758
FIELD: manufacturing technology.SUBSTANCE: invention relates to cable industry, in particular to production of enamelled wires. In method performing application of enamel insulation film on wire by anaphoresis at current density j of 2÷10 mA/cm2 with subsequent heat supply to wire coated with enamel insulation. At that, during application of enamel insulation film moving wire section with length of L is immersed into electrophoretic compound, wire is stopped, suppled with positive potential, which value provides anaphoresis current value of I, equal to I=πDLj, where D is wire diameter, m, and with said current value depositing enamel insulation film on wire section immersed into electrophoretic compound for certain period of time. At that, for application of enamel insulation electrophoretic compound is used consisting of following components, pts.wt: polyglyceroethyleneterephtalate resin 46.0-48.0, 45-50 % polybutyltitanate in xylene 1.4-1.7, diethylene glycol 0.1-5.0, xylenol 51.6-53.0, solvent 9.3-19.0, dioxane 64-70, 1 % aqueous ammonia 22-24, boron nitride nanotubes 10-12.EFFECT: invention enables increasing in heat conductivity and electrical strength of applied enamel insulation.1 cl, 1 tbl

ethod of electrolytic aluminising articles made of low-carbon steel // 2603744
FIELD: technological processes; metallurgy.SUBSTANCE: invention relates to electroplating and can be used for application of protective coating on items made of low-carbon steel, which can be operated at high temperatures. Method involves electrolysis of halide aluminium-containing melt using aluminium anode, wherein coating is applied by electrolysis of salt melt based on AlF3 with additives NaF and/or KF at temperature of 700-980 °C, current density of not less than 0.5 A/cm2 and use of aluminium melt as anode.EFFECT: obtaining solid aluminide coating having good adhesion to steel substrate, higher content of aluminium in coating, higher heat resistance of steel items and rate of aluminising.1 cl, 1 tbl, 2 dwg

Composition for metal electroplating coating containing levelling agent // 2603675
FIELD: technological processes.SUBSTANCE: invention relates to compositions for copper electroplating on substrate surfaces of electronic devices. Composition contains a source of copper ions and at least one additive of linear or branched polymer compound of imidazolium of formula (L1), where R1, R2, R3 - hydrogen, R4 - bivalent substituted or unsubstituted C2-C20 alkandiyl, n is an integer from 2 to 6,000.EFFECT: use of the aid additive (L1) in electrolytic baths for copper electroplating provides higher efficiency of copper layer leveling with achievement of essentially planar layer of copper and filling nanometric and micrometric features of surface without formation of defects, such as cavities.14 cl, 16 dwg, 10 ex

ethod of producing cerium nitrate (iv) // 2603642
FIELD: chemistry.SUBSTANCE: invention relates to method of producing cerium nitrate (IV) by electrochemical oxidation of cerium nitrate (III) in anode chamber, containing solution with initial concentration of cerium (III) ions equal to 100-130 g/l and initial concentration of free nitric acid in anolyte and catholyte equal to 8-12 g/l, at current density on platinated niobium anode of 1-3 A/dm2. Method is characterized by that process of electrolytic oxidation of cerium (III) ions is carried out in anode chamber of three-chamber electrolyzer, separated from two cathode chambers with anion-exchange and cation-exchange membranes, wherein in anode chamber constant concentration of free nitric acid of 8-12 g/l is maintained, and at end of next cycle of electrolysis in solution of cathode chamber, separated from anode chamber with cation-exchange membrane, cerium nitrate (III), concentrated nitric acid and water are added and used as anolyte for next cycle of electrolysis.EFFECT: use of presented method enables to eliminate losses of cerium ions due to their transfer from anolyte to catholyte.1 cl, 2 ex, 2 tbl

Electrolyte for electrodeposition of zinc-nickel coatings // 2603526
FIELD: physics.SUBSTANCE: invention relates to production of galvanic coatings of zinc-nickel alloys on steel and can be used in machine building, instrument-making, automotive industry and other fields. Electrolyte contains, g/l: zinc sulphate 7-10; nickel sulphate 20-30; potassium chloride 120-130; taurine 45-50; water up to 1 litre.EFFECT: reduced corrosion rate of zinc-nickel coatings, while maintaining anodic nature of protection of steels by coatings (nickel content in coatings is 12-15 wt%) with simultaneous reduction of environmental load on waste water treatment due to reduction of electrolyte toxicity.1 cl, 2 tbl, 4 ex

Device for collection and removal of gases from aluminium electrolysis cell // 2603524
FIELD: gas industry.SUBSTANCE: invention relates to a device for collection and removal of gases from aluminium electrolysis unit. In device in gas channels there are plates, dividing gas channels into four intake zone of anode gases - two at end of beam-manifold, connected to gas cleaning system, and two at end opposite to end of beam-manifold, connected to gas cleaning system. Height of gas channel in each of four zones decreases to end of beam-manifold, opposite to end connected to gas cleaning system, and height of installation of fairings above inlet holes increases. Ratio of installation height of last fairing in area of end of beam-manifold connected to gas cleaning system, to gas channel height in said section equals ratio of height of first fairing in zone at end of beam-manifold, opposite to end connected to gas cleaning system, to height of gas channel in said section.EFFECT: invention enables to align gas-dynamic resistance in separate zones of gas removal system with partial depressurisation of electrolysis cell during replacement of anodes and metal tapping.1 cl, 3 dwg
ethod for electric membrane regeneration of solution for removal of cadmium coatings and device therefor // 2603522
FIELD: chemistry.SUBSTANCE: invention relates to regeneration of process solutions. Method of regenerating solution for removing cadmium coating, containing ammonium nitrate 100-200 g/l, involves electrolysis of solution to be regenerated in two-chamber electrolysis cell with cation-exchange membrane, cathode made of stainless steel and platinised niobium anode. Electrolysis is carried out at current density on electrodes of 1-3, 5 A/dm2, anolyte used is regenerated solution, and catholyte used is a solution containing ammonium nitrate, and gas released on cathode is fed into anolyte. Method is implemented in a device comprising a two-chamber electrolysis cell with cation-exchange membrane, stainless steel cathode and platinised niobium anode, and a bubbler installed at bottom of anode chamber and configured to feed gas released on cathode into anolyte.EFFECT: invention enables regeneration of a solution to remove cadmium coating and prevents possibility of contamination of regenerated solution with foreign ions.2 cl, 3 ex

ethod of producing neodymium-iron alloy and device for its implementation // 2603408
FIELD: technological processes.SUBSTANCE: invention relates to electrolytic production of alloys. Neodymium-iron alloy is obtained, containing 78-96 wt% of neodymium. In electrolyzer neodymium oxide is loaded, iron in form of chips, molten salt mixture as electrolyte through loading pocket, in which temperature is set at 725-990°C. Electrolysis is carried out at temperature of electrolyte 735-1,000°C, and ready product is discharged via discharge pocket, in which temperature is set at 685-950°C. Thermal mode of electrolyzer is controlled by applying alternating current at constant one at working DC density on electrodes of 0.4-0.8 A/cm2 and AC density of no more than 0.8 A/cm2. Electrolyzer is equipped with end loading pocket for raw material loading and unloading pocket to unload ready product and made with possibility to control temperature mode by means of combined source of combined power supply of DC and AC, wherein discharge pocket of ready product is interconnected with bath with horizontal channel at level of melt, and loading pocket is interconnected at level of electrolyte and is made with recess for storage of undissolved neodymium oxide.EFFECT: reduced power consumption and increased stability of process are achieved.2 cl, 2 dwg, 1 tbl, 1 ex

ethod of operating bifunctional electrochemical system and device therefor // 2603142
FIELD: electrochemistry.SUBSTANCE: invention relates to operation of bifunctional electrochemical system, comprising anode and cathode electrode chambers with four-way valves at inlet and outlet of electrode chambers, separation tanks with water, connected to anode and cathode chambers and with hydrogen and oxygen storage containers, pumps, involving removal of gases from anode and cathode electrode chambers when changing operation modes, characterised by that system is equipped with additional pumps and additional separation tanks with water, interconnected with a source of water and having outlets for connection of pipelines to inlets of anode and cathode chambers of bifunctional electrochemical system, electrode chambers are cleaned by pumping water from additional reservoir and displacement of residual gases from anode and cathode chambers into containers for storage of hydrogen and oxygen. Invention also relates to a bifunctional electrochemical system.EFFECT: engineering problem solved by proposed invention consists in improvement of weight and size characteristics, reduced cost, operating costs and higher efficiency.2 cl, 2 dwg

ethod of producing wear-resistant coatings on articles made from aluminium and alloys thereof // 2602903
FIELD: metallurgy.SUBSTANCE: invention relates to production of wear-resistant and corrosion-resistant coatings on articles made from aluminium and its alloys. Method is characterized by that article is subjected to microwave oxidation in anodic-cathodic mode at current density of 7-7.5 A/dm2 and anode and cathode current ratio 1.0:0.9 for 70-75 min in an alkaline electrolyte, containing aqueous solutions of sodium hydroxide and sodium silicate with concentration 3.5-4 and 11.5-12 g/l, respectively, ground to roughness parameter Ra 0.8-1.6, cleaned from mineral and organic contaminants, soaked in an ultrasonic bath for 10-13 min with a polytetrafluoroethylene F-4D suspension, dried and thermally treated at temperature 40-50 and 290-300 °C for 10-12 and 60-62 minutes, respectively.EFFECT: high wear resistance and antifriction properties of coatings.1 cl, 3 dwg, 1 tbl, 1 ex

ethod for reduction of chromium(+6) in spent solutions // 2602862
FIELD: ecology.SUBSTANCE: invention relates to industrial ecology and can be used for neutralization or processing of liquid wastes of galvanic production. Method for reduction of chromium(+6) in spent solutions includes mixing spent solution, containing chromium(+6), with reagent-reducing agent and holding obtained reaction mixture during time, sufficient for conversion of chromium(+6) in chrome(+3). Used reducing agent used is triethanolamine, which is a component of liquid wastes from production of metal coatings or became unserviceable for operation due to partial oxidation.EFFECT: invention enables mutual neutralization of two types of toxic wastes, reduces expenses on environmental protection.9 cl, 1 dwg, 3 ex

Electrolysis bath for acidic water and method of using acid water // 2602234
FIELD: chemistry.SUBSTANCE: invention relates to electrolysis bath for production of acidic water. Bath comprises housing 100, equipped with two filling chambers 110a and 110b, separated by one ion-exchange membrane 111, wherein each of filling chambers 110a and 110b is equipped with inlet holes 112a and 113a for water and outlet holes 112b and 113b for water, formed in chamber; first group of 200 electrodes, installed in filling chamber 110a; second group of 300 electrodes, installed next to ion-exchange membrane 111 in filling chamber 110b and having polarity opposite to first group of 200 electrodes; and third group of 300' electrodes with same polarity, as second group of 300 electrodes mounted in filling chamber 110b at specified distance from second group of electrodes 300. AT that, second group of 300 electrodes and third group 300' electrodes are connected to each other so, that power supply is simultaneously fed to second group of 300 electrodes and third group of 300' electrodes.EFFECT: use of disclosed device enables generating acid water with wide range of pH measurement and alkaline water with excess OH- without using catalyst.11 cl, 5 dwg, 5 ex

Electrochemical method for producing nano-sized titanium (iv) oxide structures // 2602126
FIELD: chemistry.SUBSTANCE: invention can be used in producing heterogeneous catalysts with highly developed surface, and electrodes in lithium-ion batteries. Electrochemical method for producing nano-sized titanium (IV) oxide structures involves anodic oxidation of titanium electrode in ionic liquid with addition of water or propylene glycol in an air atmosphere. Ionic liquid has general formula K+A-, where K+ - alkylimideazoline, A- -NTf2 -, or PF6 -, or Cl-. Anodic oxidation is carried out at 20-25 °C for 5-30 minutes at direct current of 1-10 mA or at constant potential of 1-10 V.EFFECT: invention enables to obtain titanium oxide nanoparticles in the form of nanospheres, nanofibres or nanorods depending on conditions of synthesis.1 cl, 8 dwg, 7 ex

ultilayered devices for decomposition of water // 2602079
FIELD: chemistry.SUBSTANCE: invention is related to two versions of the device for water decomposition. According to one version, the device includes at least one cathode and at least one anode, arranged between the first external polymeric layer and the second external polymeric layer, Besides, between the said components, at least one cathode and said at least one anode there is at least one separation layer and wherein at least one separation layer separates at least one anode and at least one cathode and electrolyte flow between them. Invention is also related to water treatment method.EFFECT: present invention provides practicality and efficiency.20 cl, 8 ex, 14 dwg

ethod for formation of crystal nano-porous oxide on titanium-aluminium alloy // 2601904
FIELD: electroplating.SUBSTANCE: invention relates to electroplating and can be used to produce photocatalytic devices. Method involves manufacturing of a part of sintered titanium-aluminium alloy powder with size of granules 1-10 µm, washing of part in ethanol, drying, washing in distilled water, drying at temperature 80-90 °C, formation of nano-porous oxide on part's surface by anodic treatment, wherein anodic treatment is carried out in ethylene glycol with addition of 0.25 % NH4F at room temperature and constant voltage U = 60W and thermally treated in air at temperature 800-820 °C during 30-40 minutes.EFFECT: technical result is increase of specific surface area and photocatalytic activity of coating.1 cl, 2 dwg, 1 ex

Anode pin of electrolyzer with self-baking anode // 2601728
FIELD: electricity.SUBSTANCE: invention relates to a design of electrolyzers anode pin with a self-baking anode and an upper current lead in electrolytic production of aluminium. Anode pin comprises a steel cylindrical rod, the outer surface of which has a thread, herewith the outer surface of cylindrical part of the pin immersed in the anode is made with a tubular thread with pitch P equal to 0.2÷0.5 of length L of the anode pin, herewith the ratio of outer diameter D of the anode pin to inner diameter D1 of a cylinder inscribed by the inner thread top is within D:D1=1:0.9÷0.6, while the number of turns of the thread n ranges from 2 to 4.EFFECT: provided is reduced power consumption for aluminum production by reducing voltage drop in the contact node of anode pin-anode due to increasing its square, reducing the force required to be applied at screwing the pin out of the anode, excluding destruction of the sintered part of the anode at extraction of the pin.1 cl, 1 dwg

Compact service module and its use at electrolysis production of aluminium // 2601717
FIELD: machine building; metallurgy.SUBSTANCE: invention relates to aluminium electrolysis production plant service module. Module comprises frame and rotary part including bin installed on frame with possibility to turn about vertical axis, and at least one device installed on telescopic rod, first bearing structure intended for installation of entire said rotary part and installed on frame with possibility to turn about vertical axis, wherein telescopic rod fixed section is installed on rotary part second bearing structure using engagement means, fixed on fixed sections coupling part located at a distance from fixed section ends. Disclosed are service machine, service unit incorporating described above service module, and use of said service unit.EFFECT: reduced volume under service module frame and space occupied by module during rotation of its rotary part.19 cl, 7 dwg

Protective coating for titanium last stage buckets // 2601674
FIELD: engines.SUBSTANCE: invention relates to titanium buckets of large size of last stages steam-turbine engines. Bucket includes a titanium-based alloy having a leading edge, including titanium oxide, having pores and a top sealing layer filling pores, sealing layer selected from a group, consisting of chromium, cobalt, nickel, polyimide, polytetrafluoroethylene and polyester. Disclosed is a method of making such bucket and an article containing titanium-based alloy and having a leading edge.EFFECT: invention provides high durability, and reduced losses from erosion and high economic efficiency.20 cl, 4 dwg, 1 tbl

Device to extract short-circuiting wedges at connecting electrolyzer for aluminium production // 2601018
FIELD: electrical engineering.SUBSTANCE: invention relates to a device for extracting a short-circuiting wedge inserted between two conductors for disconnecting an electrolyzer in a row of electrolytic cells for aluminium production. Device comprises a means of gripping the wedge and at least one bearing cylinder oriented vertically and having a housing and a piston with a rod, herewith the housing or the rod is rigidly connected with at least one horizontal support surface directed downward and arranged to allow the wedge extraction when the extraction device is installed above the wedge, the upper horizontal surface of each conductor is located at the same level with the horizontal support surface, as well as with the wedge gripping means to allow the wedge extraction by the bearing cylinder providing opposite forces on the conductors and the wedge for their separation.EFFECT: provided is higher reliability and safety of operation with the possibility of controlling the trajectory of pushing the wedges.15 cl, 3 dwg

Systems and methods for determining alumina properties // 2600774
FIELD: data processing.SUBSTANCE: invention relates to a system and methods for assessment of alumina raw material. System includes an alumina storage unit comprising an alumina feedstock, alumina supply member in communication with alumina storage unit and aluminium electrolysis cell, while enabling alumina feedstock to periodically flow from alumina storage unit through alumina supply member to aluminium electrolysis cell, measurement device communicating with alumina supply member, and configured to measure a supply member parameters and transmit a first signal to a processor, configured to receive first signal and produce supply member parameter data based, at least in part, on first signal, data analyser, configured to analyse supply member parameter data and provide pattern characteristics of alumina based on data on characteristic of supply member, alumina flow control device communicated with at least with one of alumina storage units and alumina supply member, and a controller connected with alumina flow control device and configured to adjust alumina flow control device, based on at least pattern characteristics of alumina. Invention also discloses a method of evaluating alumina raw material using said system for prediction of properties of alumina and adjustment system on basis of forecast properties of alumina.EFFECT: higher efficiency of aluminium electrolytic cell.18 cl, 7 dwg, 1 ex

ethods of producing 1,5,7-triazabicycl[4,4,0]-dec-5-ene from reaction of disubstituted carbodiimide and dipropylene triamine // 2600741
FIELD: chemistry.SUBSTANCE: invention relates to versions of an improved method of producing 1,5,7-triazabicyclo[4,4,0]-dec-5-ene. Compound is used for an electrodeposition coating composition and for making a coated substrate by electrophoretic deposition onto a substrate of said composition. Method includes steps (a) forming a mixture containing disubstituted carbodiimide, dipropylene triamine, as well as a solvent based on ether and/or alcohol; and (b) heating said mixture at temperature from 160 °C to 240 °C to provide conditions of reaction of said disubstituted carbodiimide with said dipropylene triamine. Optionally step (c), on which a by-product is distilled from reaction mixture at step (b), wherein step (c) and step (b) are simultaneous. Preferably step a) is performed in alcohol, for example 2-butoxyethanol, monobutyl ether of diethylene glycol, polyol hexaethoxylated bisphenol A or a combination thereof. Version of method of producing 1,5,7-triazabicyclo[4,4,0]-dec-5-ene is conducting steps (a) of forming a mixture, containing disubstituted carbodiimide and dipropylene triamine; and (b) heating said mixture at a temperature of 160 °C to 240 °C to provide reaction of said disubstituted carbodiimide with said dipropylene triamine. Optionally step c) is carried out, wherein said heating is carried out while adding a diluent after step (b). Said method is implemented in absence of solvent based on ether and/or alcohol. Disubstituted carbodiimide represents is dialkyl carbodiimide, for example, N,N′-diisopropyl carbodiimide, N,N′-dicyclohexyl carbodiimide or combination thereof, or diaryl carbodiimide, for example, di-p-tolylcarbodiimide. Step a) in both versions of method can be carried out in presence of a subacid catalyst.EFFECT: method increases degree of conversion (more than 90 %) and selectivity of process (100 %) to obtain desired product with high output for a short reaction time.17 cl, 7 ex

Device for ozone synthesis // 2600475
FIELD: electricity; manufacturing technology.SUBSTANCE: invention relates to equipment intended for use in production of ozone installations. Device consists of at least one electrode system including two, connected to AC power supply source, soldered plate-ribbed electrodes (PRE) and arranged therebetween with given value of discharge gap a middle PRE. Each of extreme PRE consists of two disc membranes, each with a central hole for output of synthesised ozone and flanging at outer and inner diameters to generate electric discharge within active zone of electrode, inner and outer spacer rings, and between spacer rings in inner cavity of electrode and having thermal contact with membrane of nozzle. Middle PRE consists of two disc membranes without a central hole and with flanging along outer diameter each, as well as having thermal contact with membrane of outer spacer ring and nozzle, arranged in inner cavity of electrode. Membranes of all said PRE are made from metal or alloy with valve properties. Function of dielectric barrier on electrodes on side facing discharge gap, is performed by, formed on their outer surfaces, a nanostructured oxide layer of metal or alloy with valve properties.EFFECT: higher efficiency, production of high and ultrahigh ozone concentration with minimum power consumption.6 cl, 3 dwg, 2 tbl

ethod of producing vanillin electrochemical oxidation of aqueous solutions or suspensions lignin // 2600322
FIELD: food industry.SUBSTANCE: invention relates to a method of vanillin producing. Method involves electrochemical oxidation of aqueous lignin-bearing suspension or solution on the anode, wherein a silver electrode is used as anode.EFFECT: using this invention enables to obtain vanillin with higher output and selectivity in conditions, facilitating less corrosion of electrodes, that enables to obtain less contaminated vanillin.15 cl, 10 ex, 1 tbl
ethod for electrochemical production of iridium powder with specific surface area more than 5 m2/g // 2600305
FIELD: technological processes.SUBSTANCE: invention relates to electrochemical production of iridium powder with large specific surface, which can be used in devices for catalyzing of combustion of multicomponent fuels at temperatures of up to 2,100°C without change of chemical composition and loss of shape. Electrolysis is carried out in an electrochemical cell, formed by cathode in form of container with chloride melt of KCl-NaCl and anode in form of iridium sample arranged coaxially to container at ratio of cathode and anode current density from 0.05 to 10.EFFECT: obtaining iridium powder with specific surface area more than 5 m2/g.1 cl, 3 ex

ethod of producing materials applicable for life-support manned space flights to mars, using local resources // 2600183
FIELD: space.SUBSTANCE: group of inventions intended for life-support manned space flights to Mars. Physical and chemical section is intended for producing oxygen, water, carbon oxide, ammonia and nitrogen-based fertiliser. Biological section is intended for producing edible biomass. Set of materials and devices includes physical-chemical and biological group sections for use on the Mars soil. As source material used is atmosphere of Mars and regolit.EFFECT: production of oxygen, water, carbon monoxide, ammonia, nitrogen-based fertiliser and edible biomass from available in the place of resources.8 cl, 3 dwg, 32 tbl

ethod of producing aluminium-silicon alloy in electrolyzer for aluminium production // 2599475
FIELD: technological processes.SUBSTANCE: invention relates to a method of producing aluminium-silicon alloys in an electrolysis cell for aluminium production using amorphous silicon-containing oxide raw material. Method comprises periodic loading an electrolyte of fluoride salts, alumina, amorphous silicon-containing oxide raw material into the molten and further recovery of aluminium and silicon oxides, microsilica, produced during cleaning process gases when producing silicon and silicon-containing alloys, is used as an amorphous silicon-containing oxide raw material, which is loaded into the molten electrolyte using installations for automatic supply of the electrolysis cell. Quantity of electrolyte molten, increased by 5÷30 wt% is maintained in the electrolysis cell, together with microsilica, ground quartzite in an amount up to 40 % of the microsilica weight is added to the electrolyte molten. Microsilica is additionally preliminary mixed with alumina or fluoride salts and loaded into the electrolyte molten, mixing of microsilica with alumina is performed by their combined feed into the dry adsorption scrubbing of aluminium electrolysis housing, then the produced mixture is loaded in the electrolyte molten in the form of fluorinated alumina and fluorinated microsilica.EFFECT: higher efficiency of the electrolysis cell for an aluminium-silicon alloy, higher current output, improved quality of the aluminium-silicon alloy.5 cl, 4 tbl
 
2551086.
Up!