36 results about "Nickel electroplating" patented technology

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 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 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.

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 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 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 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 application discloses a preparation method of a Ni-Al gradient coating capable of improving the hardness of low-carbon steel, and the method comprises the following steps: performing surface oil removal and rust removal pretreatment on a low-carbon steel sample; performing nickel electroplating on the surface of the low-carbon steel substrate; and performing solid powder embedding aluminizing on the surface of the sample after the nickel plating. The application combines the nickel electroplating process and the solid powder embedding aluminizing process well by improving the coating raw material formula and the preparation process, and then a Ni-Al functional gradient coating with good combination, high hardness, no surface defects and not easy to fall off is prepared on the surface of the low-carbon steel, so as to meet the application requirement of high hardness of the low-carbon steel surface.

The application discloses a method for improving surface tension of a neodymium-iron-boron product after electroplating of nickel-copper-nickel, and relates to the technical field of sintered neodymium-iron-boron magnetic materials, aiming at solving the problem that the surface tension of the neodymium-iron-boron product after electroplating of nickel-copper-nickel cannot meet the requirements and the product consistency is poor. The method comprises the following steps: performing plasma cleaning on the neodymium-iron-boron product after electroplating of nickel-copper-nickel, so as to improve the surface tension of the product without damaging the salt mist resistance of the plating layer, and make the surface tension of the product consistent. More preferably, the neodymium-iron-boron blank is processed into a certain size, and then is subjected to surface treatment of pickling and ultrasonic cleaning or laser cleaning before electroplating of nickel-copper-nickel, so that the surface tension of the final product can be improved more easily. The method effectively improves the problem of low surface tension caused by traditional electroplating of nickel-copper-nickel, greatly improves the product consistency, and almost has no difference between products of the same batch, and has no obvious influence on the salt mist resistance of the nickel-copper-nickel layer of the product.

The application provides a method for comprehensive treatment of titanium dioxide waste acid and electroplating nickel recovery liquid, comprising the following steps: S1. treating the titanium dioxide waste acid to separate sulfuric acid; S2. treating the electroplating nickel recovery liquid to separate nickel salt; S3. reacting the sulfuric acid obtained in step S1 with the nickel salt obtained in step S2 to obtain nickel sulfate. The titanium dioxide waste acid and the nickel-containing recovery liquid are comprehensively treated for the first time, the sulfuric acid obtained by treating the titanium dioxide waste acid is used as a raw material for treating the nickel-containing recovery liquid, resources are saved, waste utilization is realized, the pressure of treating the waste acid in the titanium dioxide factory is reduced, and better economic and environmental benefits are obtained.

The application provides a soft gold electroplating impurity treatment method and a soft gold electroplating process, which comprises the following steps: performing activated carbon treatment on nickel electroplating solution in a nickel tank; installing a first electrolytic plate and a first filter element in the nickel tank; removing the first electrolytic plate and the first filter element after a first current is applied to a rectifier for a first duration; installing a second electrolytic plate and a second filter element; removing the second electrolytic plate and the second filter element after a second current is applied to the rectifier for a second duration, wherein the second current is greater than the first current, and the second duration is less than the first duration. According to the technical scheme of the embodiment, impurities can be filtered through activated carbon treatment, long-time electrolytic adsorption of impurities can be performed by using the characteristics that a small current has a good gathering effect, short-time electrolytic adsorption of residual impurities can be performed by using the characteristics that a large current has a strong adsorption capacity, impurities in the nickel tank can be effectively reduced, the composition parameters of the soft gold can be optimized, and the yield of the substrate can be improved.

The invention discloses a method for extracting and separating nickel from a nickel electroplating sludge sulfuric acid leaching solution, which comprises the following steps: carrying out cross-flow extraction on a mixed organic phase and the nickel electroplating sludge sulfuric acid leaching solution to obtain an iron-nickel-cobalt-magnesium-copper-aluminum loaded organic phase; carrying out cross-flow washing on cobalt, magnesium, copper and aluminum in the iron-nickel-cobalt-copper-aluminum loaded organic phase by adopting sulfuric acid to obtain an iron-nickel organic phase; performing cross-flow reverse extraction on nickel in the iron-nickel organic phase by using hydrochloric acid to obtain a nickel solution and an iron organic phase; and the iron organic phase is subjected to cross-flow reverse extraction by oxalic acid, is fully washed by deionized water, and is returned for recycling. According to the method, efficient extraction separation of main metal nickel and multiple coexisting impurity metal ions in the nickel electroplating sludge sulfuric acid leaching solution can be achieved, operation is easy, and the separation efficiency is high.

The invention discloses a deep hole electroplating nickel-plating solution and a nickel-plating process thereof, and relates to the field of electroplating. The nickel plating solution for deep hole electroplating comprises a water-soluble nickel salt, a complexing agent, a deep hole agent, polyethylene glycol, butynediol dipropoxy ether, a water-soluble conducting salt, dibenzenesulfonimide and water, wherein the complexing agent comprises glycine / aminopropionic acid, sulfamate, malic acid, etidronic acid and sodium citrate. According to the deep hole electroplating nickel-plating solution, nickel ions in a system can be stabilized, the reduction deposition efficiency of nickel is controlled, the nickel deposition process is stable and controllable, meanwhile, the penetration and dispersion capacity of the electroplating nickel-plating solution to a deep hole area is high, a zinc alloy substrate can evenly plate deep holes with the depth being 1 cm or above, and the electroplating quality of the deep holes is improved. Therefore, fine, uniform and compact nickel layers can be stably deposited inside and outside deep holes of the zinc alloy substrate, and the corrosion resistance can be improved.

The invention discloses a crown spring nickel plating method, and belongs to the technical field of crown spring nickel plating, and the crown spring nickel plating method comprises the following steps: S1, putting a to-be-plated part and a plating accompanying object steel ball into a roller together, then putting into a pure water tank for cleaning, then putting into an alkaline degreasing tank for ultrasonic cleaning, and finally putting into the pure water tank for cleaning; s2, putting the roller into a sulfuric acid concentration activation tank; s3, the roller is put into an electroplating nickel tank to be electroplated; s4, the roller electroplated with the bottom nickel is taken out and put into a pure water tank to be cleaned; s5, the roller in the previous step is put into a sulfuric acid concentration activation tank to be subjected to activation treatment, and nickel plating in the next step is facilitated; s6, putting the roller in the previous step into an electroplating semi-bright nickel bath for electroplating, wherein the thickness of a nickel layer is 7-11 microns at the moment; and S7, the roller is put into pure water to be cleaned for 28-32 S, then the roller is put into pure water to be subjected to ultrasonic cleaning for 58-65 S, after ultrasonic cleaning, the part is taken out to be cleaned, oil dirt is removed, and after blow-drying, the part is put into a drying oven to be dried at the temperature of 75-85 DEG C.

The device comprises an OT aluminum terminal and a copper ring, one end of the OT aluminum terminal and the copper ring are fused into a whole through an ultrasonic welding machine to form a copper / aluminum composite crimping terminal, and a nickel electroplating layer is arranged on the surface of the copper ring; the other end of the OT aluminum terminal is connected with an aluminum wire in a crimping mode through a servo crimping machine to form a conductive carrier, a PVC adhesive tape is wound outside the conductive carrier, and a double-wall heat shrink tube is assembled outside the PVC adhesive tape. According to the aluminum-attached copper terminal crimping aluminum wire device and process provided by the invention, the aluminum terminal and the copper ring are subjected to ultrasonic welding to realize a copper-to-aluminum structure, and the aluminum wire crimping is realized by adopting ultrasonic welding and physical crimping modes, so that the product cost is reduced while the protection requirement is met; the problems of electrochemical corrosion, aluminum thermal expansion, loosening and failure, oxidability, creep property, stress relaxation and the like caused by copper and aluminum electric connection are solved, and the method can be applied to the field of large-current wire electric connection of whole vehicle high-voltage wiring harnesses and unmanned aerial vehicle high-voltage wiring harnesses.

The utility model discloses a metal electronickelling deoiling device which comprises a deoiling tank body used for metal electronickelling, a cover body is arranged at the top of the deoiling tank body, the upper end of the cover body is connected with a liquid conveying pipe, a movable guide rail is arranged on the inner wall of the deoiling tank body, a movable fixing assembly is installed on the movable guide rail, and the movable fixing assembly is connected with the liquid conveying pipe. A heating pipe fixing assembly is mounted at the lower end of the movable fixing assembly, and a heating assembly is fixed in the heating pipe fixing assembly; according to the utility model, the heating pipe is spirally arranged and surrounds the wall of the oil removal tank, so that an oil removal solution is heated more uniformly, and the local overheating phenomenon is reduced; due to the design of the movable guide rail and the movable fixing assembly, the heating pipe fixing assembly can flexibly move on the inner wall of the oil removal tank to adapt to metal of different sizes and shapes; the heating assembly is installed in the protection frame to form a firm protection structure, and the design can effectively prevent the heating assembly from being mechanically damaged or corroded.

A solid oxide fuel cell (SOFC) system included high thermal conductivity materials such as copper to increase thermal energy transfer by thermal conduction. The copper is protected from oxidation by nickel electroplating and protected from thermal damage by providing Hastelloy liners inside combustion chambers. Monel elements are used in the incoming air conduits to prevent cathode poisoning.

The invention relates to the technical field of imaging module degaussing treatment, and particularly discloses a method for eliminating magnetism of a mobile phone module support coating, which comprises the following steps: S1, pretreatment; s2, anodic oxidation treatment is conducted, specifically, anodic oxidation is conducted in electrolyte, and a composite oxidation film is formed; s3, zinc replacement treatment: carrying out zinc replacement treatment in a zincate solution to form a thin layer of zinc; s4, activating treatment; s5, electroplating treatment is conducted, specifically, electroplating is conducted in a high-phosphorus chemical nickel electroplating solution, and an electroplated layer is formed; s6, carrying out sealing treatment; and S7, drying treatment. According to the method, the chemical nickel plating layer with high phosphorus content is deposited at low temperature, so that a complete amorphous structure is formed, the magnetic conductivity of the plating layer is low, the magnetic field interference on the Hall component is eliminated, and the accuracy and the stability of an optical anti-vibration function are ensured; through the mode that anodic oxidation, electroplating and sealing treatment are combined, the plating layer is endowed with extremely weak magnetism, and meanwhile excellent corrosion resistance and high hardness are provided.

The invention discloses a welding method for a common aluminum product with appearance requirements and the aluminum product. The welding method comprises the following steps that nickel electroplating treatment is conducted on an aluminum raw material; a workpiece in a target shape is formed and machined; performing surface treatment to obtain preset appearance and effect; removing the surface treatment of a to-be-welded area of the workpiece; and the welding area of the workpiece is welded. According to the method, aluminum materials are pre-plated with weldable nickel, processed into required shapes, subjected to surface treatment (such as anodic oxidation, electrophoresis and the like) and finally subjected to surface treatment for removing areas needing to be welded through laser, so that the aluminum product materials have weldability while the appearance requirement is met.

The utility model discloses an adjustable clamping structure of a metal electronickelling hanger, which comprises a moving component mounted on the inner wall of a tank body, a clamping component is mounted on the moving component, and a heating pipe is mounted in the clamping component; a tank cover is arranged at the top of the tank body, a plurality of mounting grooves are formed in the two sides of the inner wall of the tank body, and the moving assemblies are mounted in the mounting grooves; according to the utility model, through the matching of the moving chain, the rotating shaft and the driving motor in the moving assembly, the flexible movement of the clamping assembly in the groove body can be realized, so as to adapt to the nickel electroplating operation of metal workpieces with different sizes or shapes, and the adaptability of the hanging tool to different workpieces is improved; the clamping cover plate can be conveniently opened and closed through the clamping assembly, and the metal workpiece can be conveniently placed and taken out; and a groove and a locking assembly are arranged in the fixed base, and a compression spring and a locking block in the locking assembly can lock a protective sleeve on the outer wall of the heating pipe, so that the heating pipe is mounted between the fixed base and the clamping cover plate more stably.

The invention relates to the technical field of electronickelling sealing agents, and particularly discloses an electronickelling sealing agent as well as a preparation method and application thereof. The electroplating nickel sealing agent is mainly prepared from the following raw materials in parts by weight: 100 to 120 parts of water, 5 to 10 parts of n-butyl alcohol, 8 to 12 parts of silica sol, 2 to 5 parts of dimethyl sulfoxide, 0.6 to 1 part of petroleum sodium sulfonate, 0.05 to 0.085 part of triethanolamine, 0.5 to 1 part of fatty amine polyoxyethylene ether, 0.3 to 0.5 part of a corrosion inhibitor, 0.25 to 0.35 part of a surfactant, 0.85 to 1 part of a complexing agent and 0.1 to 0.25 part of a de-foaming agent. The corrosion inhibitor has a structure as shown in a general formula (I), R1 and R1'can be the same or different, and R1 and R1 'represent C1-C8 straight-chain or branched alkyl. The nickel electroplating sealing agent can be used for nickel electroplating sealing treatment and has the advantages of being good in sealing effect and corrosion resistance.

The invention relates to a low-hydrogen-brittleness electroplating additive suitable for a weak-acid zinc-nickel electroplating process, a preparation method of the low-hydrogen-brittleness electroplating additive and a zinc-nickel alloy electroplating solution. The low-hydrogen-brittleness electroplating additive comprises a polydopamine main body, an amino group or a hydroxyl group of the polydopamine main body is connected with a hydrophilic polymer chain segment through an amido bond or an ester bond; amino or hydroxyl of the polydopamine main body or the hydrophilic polymer chain segment is connected with a polymer containing carboxyl through an amido bond or an ester bond. According to the low-hydrogen-brittleness electroplating additive disclosed by the invention, plating crystal grains in a zinc-nickel plating can be rough, so that the appearance loses gloss macroscopically; and an obvious nickel-rich area can appear in the zinc-nickel coating. The holes in the nickel-rich area are macroscopically visible. And the holes can be used as hydrogen escape holes, so that hydrogen atoms are easy to escape in the post-treatment process of the plating layer. The hydrogen escape holes in the plating layer are combined with the non-compact plating layer, so that the low hydrogen brittleness of the zinc-nickel electroplating process can be effectively ensured.

The application relates to the technical field of titanium alloy, in particular to a special electroplating base nickel process for titanium alloy. The process comprises the following steps: firstly, removing oil from a titanium alloy base body through alkaline electrolysis; secondly, activating the titanium alloy base body in an activation solution compounded by hydrochloric acid and ammonium hydrogen fluoride at 20-25 DEG C for 20-45s, and then transferring the titanium alloy base body to an electroplating tank after washing; thirdly, electroplating in a cyanide-free base nickel electroplating solution containing nickel sulfate, nickel chloride, boric acid and modified sodium sulfate, controlling the pH value to be 3.5-4.5, the temperature to be 50-65 DEG C, the cathode current density to be 2-5 A / dm 2 , and adopting two-stage current density power supply. The modified sodium sulfate is prepared through freezing-out crystallization and heterogeneous nucleation technology, takes aluminum nitride as a nucleation core, adds sodium silicate, sodium dihydrogen phosphate and sodium tetraborate decahydrate for regulation and control, and finally obtains high-purity and uniform-particle-size crystals. The process is environment-friendly and cyanide-free, the plating layer has strong adhesion, high compactness, few defects and good batch consistency.

The invention belongs to the technical field of metal surface treatment, and particularly relates to an alkaline zinc-nickel plating solution suitable for a low-temperature freeze-thaw environment, which comprises the following components in parts by weight: 10-15 parts of zinc oxide, 5-10 parts of nickel sulfate hexahydrate, 20-30 parts of tetraethylenepentamine, 20-25 parts of diethylenetriamine, 35-55 parts of triethanolamine, 80-120 parts of sodium hydroxide, 20-30 parts of 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 20-30 parts of 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 20-30 parts of sodium hydroxide, 20-30 parts of The cleaning agent is prepared from the following components in parts by weight: 0.01 to 0.05 part of 1, 10-phenanthroline, 0.05 to 0.2 part of polyethylene glycol, 0.2 to 1 part of thiourea derivative, 10 to 20 parts of glycerol, 0.01 to 0.05 part of lauryl sodium sulfate and 20 to 40 parts of tetrahydroxypropyl ethylenediamine. A zinc-nickel electroplated layer prepared by the alkaline zinc-nickel plating solution has relatively strong toughness and binding force and relatively high corrosion resistance in a low-temperature freezing and thawing environment, in addition, the preparation method of the alkaline zinc-nickel plating solution is simple in technological process and low in equipment requirement, large-scale industrial production is favorably realized, and the alkaline zinc-nickel plating solution has relatively good comprehensive use performance.

The utility model discloses a semiconductor wafer chemical nickel electroplating drying device, which relates to the technical field of chip processing, and comprises a drying box body, the inner top wall of the drying box body is fixedly connected with a heating plate, the bottom of the drying box body is provided with a drying port, the bottom of the drying box body is provided with a round base, and the round base is fixedly connected with the heating plate. The wet wafers produced by electroplating equipment are continuously conveyed to the position below the drying box body through intermittent rotation of the rotary disc, drying heat is provided through the heating plate arranged in the drying box body, drying airflow is provided through the ventilation fans arranged on the two sides, and the drying efficiency is improved. And hot air from top to bottom is formed and blown to the wet wafer, so that the wafer drying rate of the drying box body is consistent with the wafer processing rate of electroplating equipment, the wet wafer can be continuously heated and dried, and subsequent wafer processing and storage are facilitated.

The utility model discloses a contact terminal of a nitrogen-oxygen sensor, which comprises a contact terminal body, a contact terminal head part, two contact terminal R angles, a contact terminal inverted buckle and a contact terminal connecting sheet, wherein the contact terminal body is provided with a contact terminal head part, two contact terminal R angles, a contact terminal inverted buckle and a contact terminal connecting sheet. According to the utility model, the stainless steel material and the nickel electroplating material are adopted, so that the corrosion resistance, the mechanical strength and the heat resistance are excellent, the stable performance can be kept in a severe environment, and the service life is prolonged. The precise size specification meets the installation requirement and the performance requirement, it is ensured that the internal space layout of the sensor is reasonable, interference with other parts is avoided, and meanwhile the sensor has enough mechanical strength and stability.