85 results about "Nickel electroplating" patented technology

The utility model relates to the technical field of blade polishing wheels, and discloses a welding type seamless metal screen cloth polishing wheel which comprises a wheel core, an elastic base body is arranged on the outer layer of the wheel core, and a grinding material shell covers the outer layer of the elastic base body. The grinding material shell comprises metal screen cloth, a group plating layer is arranged on the lower layer of the metal screen cloth, a film structure is arranged on the surface of the metal screen cloth, a plurality of grinding material seats are arranged on the film structure, nickel electroplating layers are arranged on the grinding material seats, and grinding materials are arranged on the nickel electroplating layers. According to the welding type seamless metal mesh polishing wheel, the seamless polishing wheel can be prepared through the rubber bag forming technology, the service life of the polishing wheel is further prolonged, meanwhile, through the electroplating method and the like, the abrasive base in the abrasive shell is formed after forming, the consistency of the shape of the abrasive base and the overall theoretical appearance of the polishing wheel is better, and the polishing effect is better. And the polishing wheel with higher precision can be further prepared through forming and grinding.

The invention relates to the technical field of electroplating, and discloses an electroplating nickel solution as well as a preparation method and application thereof. The nickel electroplating solution comprises the following components by concentration: 150 to 300 g / L of nickel salt, 30 to 80 g / L of a complexing agent, 30 to 80 g / L of boric acid, 30 to 100 mg / L of a brightener, 20 to 100 mg / L of a leveling agent and 50 to 150 mg / L of an anti-pinhole agent. A solvent of the nickel electroplating solution is water; and the brightening agent comprises 2-hydroxypyrimidine hydrochloride. The nickel electroplating solution provided by the invention has relatively good stability, the 2-hydroxypyrimidine hydrochloride is used as a brightening agent, a plating layer with better brightness can be formed, a base material protection effect can be provided, the nickel electroplating solution is reasonable in component and working parameters, a plating layer with good uniformity and brightness and without folding and plating cracks can be formed, and the electroplating quality is improved. The problems of plating pinholes and plating darkening do not exist, and the method can be applied to nickel electroplating surface treatment of the ceramic substrate.

The invention relates to the technical field of lead frame coarsening, in particular to a nickel coarsening process of a lead frame. A nickel coarsening process of a lead frame comprises the following procedures of oil removal, acid pickling, nickel electroplating coarsening and acid pickling, the nickel electroplating coarsening refers to that an electroplating coarse nickel layer is obtained in an electroplating bath loaded with nickel electroplating coarsening liquid in an electroplating mode, and the nickel electroplating coarsening liquid comprises 90-130 g / L of nickel aminosulfonate, 40-50 g / L of boric acid and 0.1-0.3 g / L of an additive. According to the nickel roughening process of the lead frame, the rough nickel layer can be directly obtained, and the copper substrate does not need to be treated, namely additional electroplating pretreatment is not needed. According to the nickel coarsening process, crystallization of nickel ions on the surface of the lead frame is remarkably affected in the nickel electroplating deposition process through the additive in the nickel electroplating coarsening liquid, the limiting current density of the nickel electroplating coarsening liquid is reduced, deposition of a high-current-density area is restrained, nearly-spherical round grains are formed, and the nickel electroplating quality is improved. Meanwhile, the process of electron deposition of nickel ions is accelerated, cathodic polarization is reduced, growth of nickel crystal nucleuses is promoted instead of nucleation, large-size particles are formed, the surface roughness is improved, an electroplating coarse nickel layer with certain roughness is finally formed, the content of nickel metal in an electroplating nickel coarsening solution cannot be continuously increased, wastewater discharge is reduced, and the production cost is reduced. The environment is protected.

The invention relates to the design of a radium target for preparing 225Ac through a photo-nuclear reaction in the technical field of production of a mechanical produced medical isotope 225Ac, in particular to a 226Ra isotope target for producing 225Ac and application of the 226Ra isotope target. The 226Ra isotope target comprises a nickel substrate, a 226Ra isotope sample, a nickel electroplated layer and a nickel protective shell; wherein the 226Ra isotope samples are uniformly concentrated at the central position of the nickel substrate, the nickel electroplated layer covers the outer surfaces of the 226Ra isotope samples, and the nickel substrate and the nickel electroplated layer wrap the 226Ra isotope samples in the middle; and the nickel protective shell wraps the nickel electroplated layer. The 226Ra isotope target can be applied to an electron linear accelerator and can be used as a raw material target for producing 225Ac through a photo-nuclear reaction, and the production quantity of the 225Ac isotope can be increased.

The invention relates to the field of electroplating, and provides a technological preparation method for alkaline electroplating of zinc and nickel, which comprises the following steps: S1, pretreating a workpiece; s2, preparing a tank solution; s3, preparing a first reagent, a second reagent and a third reagent; s4, extracting a proper amount of bath solution, analyzing the content of zinc in the extraction bath solution by using a first reagent, analyzing the content of sodium hydroxide in the extraction bath solution by using a second reagent, and analyzing the content of nickel in the extraction bath solution by using a third reagent; s5, judging whether the contents of zinc, sodium hydroxide and nickel in the bath solution are within a specified process range or not according to electroplating process requirements, and if not, returning to the step S2; s6, the workpiece is put into a plating tank, tank liquid is added, electroplating parameters are controlled, and electroplating is completed; the content of substances in the bath solution can be detected, and the preparation stability of the bath solution is improved.

The invention discloses a high-efficiency and high-leveling-capacity electronickelling solution, and relates to the technical field of electroplating. The high-efficiency and high-leveling-capacity electronickelling solution comprises the following components in parts by mass: 60-90 parts of nickel salt; 60-120 parts of a composite brightener; 40-80 parts of a stabilizer; 50 to 100 parts of an anti-pinhole agent; 40-80 parts of a dispersant; and 50-150 parts of a composite leveling agent. The composite brightener provided by the invention improves the tolerance of high current density, and especially has more prominent advantages on the compactness and binding force of a thick nickel coating; the anti-pinhole agent can reduce the porosity of the plating layer possibly caused by gas precipitation in the electroplating process, and less nickel nodule is generated, so that the toughness of the plating layer is enhanced; according to the nickel electroplating solution with the composite leveling agent matched with the composite brightening agent, the roughness Ra value of a base material with the roughness Ra value being 2.0 microns or above can be reduced to 0.4 microns or below, a dendritic crystal structure cannot occur when the leveling agent and the brightening agent are used in cooperation, and the problem of brittleness of a plating layer is avoided.

The invention discloses a non-precious metal hydrogen evolution electrode and a preparation method thereof, which comprises the following steps: S1, preparing a nickel electroplating solution, placing a copper substrate in the electroplating solution, and forming a nickel plating layer on the surface of the copper substrate by a direct current power supply electrodeposition method; S2, after the nickel plating is completed, washing and drying, and then placing in an activation solution for activation to obtain a non-precious metal hydrogen evolution electrode. The non-precious metal hydrogen evolution electrode can generate a nickel micro / nano composite structure on the surface of the copper substrate material to improve the hydrogen evolution catalytic performance.

The invention provides a secondary metallization nickel electroplating pretreatment process for a ceramic relay shell, which comprises the following steps: S1, pretreatment: carrying out soaking micro-etching on the surface of the shell by using a micro-etching solution to form a metal rough surface; s2, activating: soaking and activating the shell treated in S1 with acid; s3, nickel pre-plating: carrying out pre-plating treatment on the shell treated in S2 in a nickel pre-plating solution; and S4, soft nickel electroplating, wherein nickel plating is conducted in a nickel plating system. Pretreatment is carried out before conventional electroplating, a dense nickel layer with high deep plating capacity is plated, and the problem of blistering in subsequent welding is effectively solved.

The invention relates to the technical field of electronic component manufacturing, and discloses a method for improving the anti-aging capability of an inductance magnetic core, which comprises the following steps: pretreatment and bottom layer electroplating: performing oil removal and acid pickling activation on the inductance magnetic core, performing nickel electroplating treatment after cleaning, and forming a bottom nickel layer on the surface of the end of the magnetic core; chemical densification deposition: adopting the plating solution in the first aspect, immersing the magnetic core treated in the step (1) into the heated plating solution, and reacting under the condition of not applying impressed current, a Ni-P-B-W barrier layer is deposited on the surface of a bottom nickel layer, an amorphous-nanocrystalline composite structure is constructed on the surface of an electrode through a combined process of bottom nickel electroplating, middle chemical deposition of the Ni-P-B-W compact barrier layer and surface tin electroplating, the barrier layer utilizes the co-deposition effect of phosphorus, boron, tungsten and nickel, the grain boundary defect is eliminated, and the performance of the electrode is improved. And a mutual diffusion path of bottom layer metal and surface layer tin and a permeation channel of an external corrosive medium are effectively blocked.

The invention belongs to the technical field of plating processes, and particularly relates to a high-binding-force diamond aluminum plating process. The method comprises the following specific steps: S1, composite nickel plating: carrying out composite nickel plating on a pretreated diamond aluminum composite material; s2, palladium activation, wherein the diamond-aluminum composite material obtained after composite nickel plating is put into palladium salt to be soaked, and then the diamond-aluminum composite material is taken out to be cleaned; s3, chemical nickel plating; s4, sensitization is carried out; s5, palladium activation; and S6, chemical nickel plating, nickel electroplating, annealing treatment and drying are sequentially conducted on the diamond aluminum composite material, and the plating process is completed. According to the plated diamond aluminum, a plating layer does not peel, swell and discolor under the gold-tin soldering condition, diamond particles do not fall off, the overall wettability is good, the stability is high, the cost is low, operation is easy, and the condition of batch production can be met.

The invention provides a preparation method of a nickel-plated BC solar cell silicon substrate, a BC solar cell and a photovoltaic module, and relates to the technical field of solar cells. The preparation method comprises the following steps: taking a BC cell silicon substrate as a cathode, enabling the to-be-electroplated surface of the BC cell silicon substrate to be in contact with nickel electroplating liquid, carrying out flash plating treatment, and then carrying out main plating treatment to obtain a nickel-plated BC solar cell silicon substrate. According to the preparation method of the nickel-plated BC solar cell silicon substrate, flash plating is firstly carried out, a layer of extremely thin nickel can be rapidly covered on a patterned area of the silicon substrate, and a sealing bottom layer which is firm in attachment and low in porosity is constructed; the current distribution is more uniform, and nickel ions are favorably diffused and deposited towards the deep part and the central area of the pattern, so that better deep plating capability and overall thickness uniformity are obtained, and finally, the adhesive force, the uniformity and the reliability are comprehensively improved.

The utility model discloses a zinc-nickel electroplating wastewater pretreatment stirring device, which belongs to the technical field of wastewater treatment and comprises a stirring tank body, a feed inlet is arranged on the side edge of the stirring tank body, a stirring mechanism is arranged at the upper end of the stirring tank body, and supporting legs are arranged on the side edge of the lower end of the stirring tank body. By arranging the stirring mechanism, the mounting box and the stirring assembly can be driven to rotate through the motor I, and meanwhile, the stirring rod is driven to rotate through the motor II, so that the stirring rod can realize autorotation and rotation around the center, and the stirring effect on wastewater is improved; according to the stirring tank, the stirring tank inner wall cleaning mechanism is arranged, the inner wall of the stirring tank can be conveniently cleaned through the mechanism, and therefore it is guaranteed that the stirring tank can be continuously and efficiently used, and the stability of the scraping plate can be improved through the inclined supporting rod.

The invention discloses a pre-rolling anti-cracking surface treatment method for a large-section titanium alloy square billet, and belongs to the technical field of titanium alloy surface treatment. The method comprises the following steps: S1, sequentially carrying out surface grinding and oil removal treatment on a titanium alloy square billet; s2, the pretreated square billet is subjected to nickel electroplating, and an initial nickel plating layer is formed; s3, the nickel-plated square billet is heated and subjected to heat preservation under the vacuum condition; s4, secondary nickel electroplating is conducted on the square billet after stress relief, and a thickened nickel plating layer is formed; and S5, the secondary nickel-plated square billet is rolled after being subjected to uniform-temperature heating and heat preservation. A uniform and compact nickel plating layer is formed on the surface of the large-section titanium alloy square billet through electroplating, the temperature reduction rate of the surface layer of the square billet after the square billet is discharged from a furnace can be reduced, the temperature gradient between the surface and the interior of the billet is remarkably reduced, and the rolling plasticity of the billet in the rolling starting link is guaranteed; the technical problem that the large-section titanium alloy square billet is prone to cracking in the rolling process can be effectively solved.

The invention relates to a nano nickel electroplating process used after secondary zinc deposition of an aluminum alloy. The nano nickel electroplating process comprises two steps of preparing a plating solution and electroplating. A nano nickel agent A and a nano nickel agent B are added into the plating solution, and the nano nickel agent A comprises, by mass, 5%-9% of nickel sulfate, 6%-10% of sodium propargyl sulfonate, 5%-9% of sodium hypophosphite monohydrate and 72%-84% of deionized water; and the nano nickel B agent comprises the following components in percentage by mass: 5-9% of butynol alcohol ether sodium propane sulfonate, 6-10% of sodium propargyl sulfonate, 5-9% of sodium hypophosphite monohydrate and 72-84% of deionized water. Sodium propargyl sulfonate is coordinated with Ni < 2 + > in a high-activity area of a workpiece through electrostatic adsorption and coordination so as to inhibit deposition of Ni < 2 + >; the surface energy of a low-activity area of the workpiece is low, Ni < 2 + > deposition is basically not affected, negatively-charged propargyl sulfonate radicals can be attracted by weak positive charges in the area, and continuous generation of new crystal nucleuses is promoted. The sodium hypophosphite monohydrate can prevent Ni < 2 + > from being oxidized through reaction with oxygen. Butynol alcohol ether sodium propane sulfonate inhibits overgrowth of crystal grains and refines the crystal grain structure through adsorption and steric hindrance effect.

The invention provides a portable nickel electroplating device and method for in-situ repair, and relates to the technical field of electroplating repair. According to the nickel electroplating device, firstly, in-situ fixing and repairing of the nickel plating layer of the damaged workpiece by the nickel electroplating device are achieved through the vacuum fixing module, the cost caused by disassembly of the damaged workpiece and secondary damage caused by movement of the damaged workpiece are avoided, and portability is achieved; then, a replaceable customized electroplating mold module is adopted, directional repair is achieved for damaged areas of different shapes, and the application range is wider; and finally, the electroplating liquid storage module and the nickel electroplating device are integrally designed, the electroplating liquid is directly pressed into the customized electroplating mold module through the electroplating liquid injection module, and the nickel electroplating technological process is simplified.

The application provides a method for analyzing nickel in a zinc-nickel electroplating solution. The method comprises: performing standard coulometric titration on a sodium thiosulfate standard solution to calculate an actual molar concentration c 标准 ; adding an oxidizing agent solution and a sodium hydroxide solution to the zinc-nickel electroplating solution to obtain a high-nickel hydroxide precipitate, then adding a KI solution and sulfuric acid to obtain a sample solution; adding a second part of the sodium thiosulfate standard solution and a second part of a KI electrolyte to an electrolytic cup to perform sample coulometric titration and calculate the molar concentration c 镍 of nickel in the zinc-nickel electroplating solution. The application uses the change in the valence state of nickel hydroxide, combines a redox reaction with an indirect coulometric titration method, and obtains a cyanide-free coulometric titration method for quantitatively determining the content of nickel in a zinc-nickel electroplating solution. The method does not need to prepare a standard solution, indirectly determines nickel by using electrically generated iodine in a high-concentration zinc metal ion background, realizes high selectivity, high precision, and online determination of the content of nickel, and can significantly improve the detection efficiency.

The invention discloses an electroplating nickel online high-power concentration recycling system and method, and relates to the field of electroplating wastewater treatment, and the electroplating nickel online high-power concentration recycling system comprises a quartz sand filter, a security filter, a primary reverse osmosis device, a secondary reverse osmosis device, an electrodialysis device and a wastewater treatment station. According to the nickel electroplating online high-power concentration recycling system and method, useful substances in the wastewater can be recycled according to the procedures of reducing the amount of the electroplating wastewater at the source and generating the wastewater in an electroplating production line, and the purposes of recycling the useful substances, reducing the wastewater discharge amount and reducing the pollutant discharge amount are achieved; nickel sulfate or nickel ammonium sulfonate can be highly concentrated; equipment composition is simplified, operation and maintenance are easy, and the automatic control degree is improved; the water quantity of the concentrated solution can be effectively reduced; the device has the advantages that the occupied area is reduced, integration is achieved as much as possible, nickel metal is recycled or reused as much as possible, tap water is saved, the operation cost is saved, and the wastewater discharge amount is reduced.

This utility model relates to the field of anode racks for electroplating, and discloses an anode rack for zinc-nickel electroplating, including a support column, an upper disk, a lower disk, a sliding block, a moving rod, a fixed rod, an arc-shaped groove, a stud, and an operating wheel. In use, the operating wheel is first rotated clockwise to move the stud and the moving rod away from the fixed rod, causing the arc-shaped groove on the fixed rod to disengage from the support column, thus releasing the support column's constraint. Then, the distance between the upper and lower disks is adjusted according to the size of the workpiece to be electroplated. After adjustment, the operating wheel is rotated counterclockwise to move the stud and the moving rod closer to the fixed rod until the fixed rod and the moving rod are tightly abutted. At this point, the two arc-shaped grooves form a semi-circular groove that fits tightly against the outer wall of the support column, confining and fixing the support column within the arc-shaped groove. This utility model has the advantages and effects of ensuring a stable connection between the upper disk and the support column, effectively preventing shaking and detachment, and improving the safety and efficiency of subsequent electroplating.

Provided is a nickel plating solution in which a ceramic substrate is less likely to be eroded. The plating solution of the present invention contains a nickel ion supply source, a sulfonic acid represented by formula 1: R-SO3H (R is an alkyl group or a hydroxyalkyl group having 1 to 5 carbon atoms) or a salt thereof, sodium hydroxide, and a pH buffer.

The invention discloses a low-stress high-strength nickel-phosphorus alloy electroplating solution and a preparation method and application thereof, and belongs to the technical field of nickel electroplating. The plating solution comprises nickel aminosulfonate, lactic acid and / or lactate, phosphorous acid and / or phosphite, saccharin and / or saccharin salt, and a solvent of the plating solution is water; the molar ratio of nickel aminosulfonate to lactic acid and / or lactate is 0.7 < = M nickel aminosulfonate / M lactic acid and / or lactate < = 1, the molar ratio of phosphorous acid and / or phosphite to saccharin and / or saccharin salt is 2 < = M phosphorous acid and / or phosphite / M saccharin and / or saccharin salt < = 8, and the pH value of the plating solution is 3.0-4.5. According to the low-stress high-strength electroplating nickel-phosphorus alloy plating solution as well as the preparation method and the using method thereof, an obtained nickel-phosphorus alloy plating layer is controllable in stress, and the strength of the nickel-phosphorus alloy plating layer is remarkably superior to that of pure nickel and nickel-cobalt alloy plating layers.

The present invention relates to the technical field of metal materials, and discloses a pre-nickel-plated steel for battery shells and a preparation method thereof. The method includes hot rolling, coiling, pickling, cold rolling, nickel electroplating and continuous annealing; the nickel electroplating process includes: preparing nickel sulfate, nickel chloride, cobalt sulfate, boric acid, sodium lauryl sulfate, citric acid, pre-treated filler, nano-titanium dioxide particles and cerium salt into an electroplating solution, and then placing the steel substrate obtained after cold rolling in the electroplating solution for electroplating, wherein the concentration of the pre-treated filler is 1.2-1.5 g / L, the concentration of the nano-titanium dioxide particles is 0.5-1.0 g / L, and the concentration of the cerium salt is 0.1-0.2 g / L. The pre-nickel-plated steel for battery shells prepared by this method has excellent corrosion resistance, high hardness, good stamping performance, strong bonding between the nickel plating layer and the steel substrate, and low surface iron exposure rate.

The utility model discloses an acidic zinc-nickel electroplating reaction device, and relates to the technical field of workpiece electroplating. The acidic zinc-nickel electroplating reaction device comprises an electroplating bath, a plurality of anode bars and a semi-permeable membrane. Electroplating liquid can be contained in the electroplating bath; the plurality of anode bars are positioned in the electroplating bath and can be at least partially immersed in the electroplating liquid, the interior of each anode bar is provided with an accommodating space through which the anode liquid can flow, and a zinc anode immersed in the anode liquid is also arranged in the accommodating space. The semipermeable membrane covers the outer side of the anode bar and is used for isolating the anolyte from the electroplating solution, and the semipermeable membrane can permeate zinc ions in the anolyte and isolate nickel ions in the electroplating solution. By adopting the technology provided by the utility model, the phenomenon of zinc anode dissolution blocking caused by zinc-nickel replacement can be effectively avoided.

The invention relates to a nickel electroplating bath for depositing a decorative nickel coating on a substrate to be treated, characterized in that the electroplating bath comprises at least one source of nickel ions, at least one amino acid and / or at least one carboxylic acid other than an amino acid; wherein the total concentration of the amino acids is in the range of from 1 to 10 g / l, and wherein the total concentration of carboxylic acids, not amino acids, is in the range of from 10 to 40 g / l; wherein the electroplating bath is free of boric acid; wherein the total concentration of the nickel ions is in the range of 55 to 80 g / l; and wherein the nickel electroplating bath has a chlorine content in the range of 7.5 to 40 g / l. The invention also relates to a method for depositing a nickel coating on a substrate to be treated; and the use of such a nickel electroplating bath according to the invention for depositing bright, semi-bright, satin, matte or non-conductive particle-containing nickel coatings by carrying out this method.

The utility model relates to the field of bolt processing, and discloses complete equipment for processing a sealing bolt, which comprises a multi-station bolt forming machine, a lathe, a grinding machine, a heat treatment mesh belt furnace, an electroplating bath, a thread rolling machine, a high-temperature degreasing tank and a sealing tank which are sequentially arranged, wherein the multi-station bolt forming machine is provided with a cold heading forming die which is used for heading a bolt into a semi-finished product; the lathe is used for turning the head diameter of the bolt to ensure the head diameter and R angle tolerance; the grinding machine is used for grinding the bolt rod part to ensure the roughness of the surface of the rod part; the heat treatment mesh belt furnace is used for heat treatment; the electroplating bath is used for electroplating zinc-nickel surface treatment; the thread rolling machine is used for machining threads; the high-temperature degreasing tank is used for degreasing; and the sealing groove is used for sealing treatment. The bolt is directly subjected to cold heading to form a semi-finished product by using the cold heading forming die, so that most of form and location tolerance and dimensional tolerance of the semi-finished product are ensured, and most of machining cost is saved; and thread rolling is carried out after heat treatment and zinc-nickel electroplating, so that the precision of threads is effectively guaranteed.

The present invention discloses a nickel plating solution ultrafiltration system, which includes a filter cartridge housing, a pressure filtration mechanism and a disassembly and replacement mechanism. The upper port of the filter cartridge housing is hermetically fixed with a top cover by bolts, and the lower port of the filter cartridge housing is hermetically fixed with a bottom cover by bolts. The pressure filtration mechanism is arranged in the housing cavity of the filter cartridge housing. It assists in the high-efficiency ultrafiltration operation of the nickel plating solution through the way of reciprocating extrusion, and through the way of automatic extraction, it conducts the recovery treatment of the nickel plating solution accumulated in the narrow part of the lower chamber of the middle cavity of the bottom cover, ensuring that the filter element body can be disassembled and replaced without accumulated nickel plating solution. The disassembly and replacement mechanism is arranged in the wide part of the lower chamber of the middle cavity of the bottom cover. This nickel plating solution ultrafiltration system realizes the recovery treatment of the accumulated nickel plating solution, ensures that the filter element is disassembled and replaced in an operating environment without accumulated nickel plating solution, avoids causing harm during the disassembly and replacement process, and realizes the automatic switching between the nickel plating solution pressure filtration function and the accumulated nickel plating solution recovery function.

The invention relates to the technical field of metal materials, and discloses steel for a pre-nickel-plated battery shell and a preparation method of the steel. The method comprises the steps of hot rolling, coiling, acid pickling, cold rolling, nickel electroplating and continuous annealing. The nickel electroplating process comprises the steps that nickel sulfate, nickel chloride, cobaltous sulfate, boric acid, lauryl sodium sulfate, citric acid, pretreatment filler, nanometer titanium dioxide particles and cerium salt are prepared into electroplating liquid, then the steel matrix obtained after cold rolling is placed in the electroplating liquid to be electroplated, and the concentration of the pretreatment filler is 1.2-1.5 g / L; the concentration of the nano titanium dioxide particles is 0.5 to 1.0 g / L, and the concentration of the cerium salt is 0.1 to 0.2 g / L. The steel for the pre-nickel-plated battery shell prepared by the method has excellent corrosion resistance, relatively high hardness and good stamping performance, the binding force between a nickel-plated layer and a steel substrate is strong, and the surface iron exposure rate is low.

The invention discloses a preparation method of a nickel-cobalt alloy hydrogen evolution catalytic electrode with a micro-nano composite structure, and the method comprises the following steps: S1, preparing a nickel electroplating solution, immersing a copper substrate into the nickel electroplating solution, and preparing a nickel coating on the surface of the copper substrate by adopting a direct current electrodeposition method; s2, preparing a nickel-cobalt electroplating solution, transferring the copper substrate subjected to nickel plating into the nickel-cobalt electroplating solution, and depositing a nickel-cobalt alloy plating layer on the surface of the nickel plating layer by adopting the direct-current electrodeposition technology again; and S3, the obtained nickel-cobalt alloy coating is subjected to surface activation treatment in an activation solution, and the nickel-cobalt alloy hydrogen evolution catalytic electrode is obtained after cleaning and drying. According to the method, the nickel-cobalt alloy hydrogen evolution electrode with the micro-nano composite structure can be constructed on the surface of the copper matrix, and the nickel-cobalt alloy hydrogen evolution electrode has efficient hydrogen evolution catalytic performance.

The purpose of the present invention is to provide an electric nickel plating solution in which a ceramic element body does not readily erode. An electroplating solution according to the present invention comprises: a nickel ion supply source; a sulfonic acid represented by formula 1: R-SO3H (R is an alkyl group or hydroxyalkyl group having 1-5 carbon atoms), or a salt thereof; sodium hydroxide; and a pH buffering agent.

The invention provides a preparation method of a copper-nickel composite coating carbon fiber reinforced epoxy resin composite material, and belongs to the technical field of electromagnetic shielding materials, and the preparation method comprises the following steps: pretreating the surface of carbon fiber; the pretreated carbon fiber serves as a cathode, a nickel plate serves as an anode, and spherical nickel-plated layer carbon fiber is obtained through electroplating in nickel electroplating liquid; immersing the nickel-plated carbon fiber into a copper plating solution for copper plating to obtain copper-nickel composite plated carbon fiber; the copper-nickel composite coating carbon fiber is immersed in KH550 hydrolysate to be modified, and modified copper-nickel composite coating carbon fiber is obtained; placing the modified copper-nickel composite coating carbon fiber in a mold, and infiltrating the modified copper-nickel composite coating carbon fiber by using a carboxylated carbon nanotube doped epoxy resin matrix; and curing and demolding the infiltrated modified copper-nickel composite coating carbon fiber to obtain the copper-nickel composite coating carbon fiber reinforced epoxy resin composite material. According to the preparation method of the copper-nickel composite coating carbon fiber reinforced epoxy resin composite material provided by the invention, the prepared material is wide in electromagnetic shielding frequency band coverage and good in mechanical property.

The invention discloses a manufacturing method of a thick copper circuit board, and discloses the thick copper circuit board, and the manufacturing method of the thick copper circuit board comprises the following steps: 1, obtaining a substrate, and carrying out the full-board electroplating processing of the substrate, so as to form a thick copper layer on the substrate; 2, manufacturing a local gold plating pattern on the thick copper layer through dry film pasting, exposure and development in sequence; 3, the whole thick copper layer serves as a conductor, and nickel electroplating and gold electroplating are sequentially carried out on the position of the local gold electroplating pattern; 4, the thick copper layer is subjected to film stripping through alkaline film stripping liquid; 5, etching the thick copper layer by adopting an etching solution, and manufacturing an inner layer circuit on the thick copper layer; the whole thick copper layer is used as a conductor to carry out nickel electroplating and gold electroplating, so that the requirement of designing and removing a gold electroplating lead on the copper layer in the traditional process is avoided, the mechanical damage of the circuit board, which is easily caused when the lead is removed, is avoided, and the yield of the circuit board is remarkably improved.