870results about "Electrolytic coatings" patented technology

The invention relates to the technical field of metal surface protection, and discloses a corrosion-resistant self-repairing metal fastener and a preparation method thereof.The corrosion-resistant self-repairing metal fastener comprises a zinc alloy matrix, a nanometer passivation layer, a slow-release corrosion-resistant layer and a self-repairing functional layer, and the nanometer passivation layer, the slow-release corrosion-resistant layer and the self-repairing functional layer sequentially wrap the zinc alloy matrix; the zinc alloy matrix consists of Al, Cu, Mg, Ce and Zn; the nano passivation layer adopts zinc phosphate / silane composite sol to construct a Si-O-P covalent bond network, and plasma is combined to graft epoxy groups to enhance the interface bonding strength; the slow-release anti-corrosion layer is used for loading a pH response type benzotriazole derivative through gradient aperture mesoporous silica, so that the dynamic controlled release of a corrosion inhibitor is realized; the self-repairing functional layer adopts a synergistic effect of a mechanical triggering type sulfydryl siloxane microcapsule and a pH triggering type EDTA chelating agent microcapsule to form a physical plugging-chemical passivation dual-mode repairing mechanism. Through four-stage cooperation of matrix modification, interface strengthening, slow-release regulation and control and intelligent repair, the corrosion resistance of the corrosion-resistant self-repairing metal fastener in a complex environment is remarkably enhanced.

The invention relates to the field of metal surface treatment, and discloses an efficient electroplating process for a cotton picker spindle and an electroplating liquid formula, the efficient electroplating process comprises the following steps: step 1, substrate pretreatment: sequentially carrying out alkali washing, acid washing and plasma activation on the spindle; step 2, preparing an electroplating solution: dissolving nickel sulfate, sodium hypophosphite, a composite nano additive and a complexing agent in water, and adjusting the pH value to 4.8-5.3; step 3, gradient pulse electroplating: carrying out pulse electroplating in three stages, including bottom layer deposition, transition layer deposition and composite layer deposition; 4, post-treatment is conducted, specifically, silane sealing and curing are conducted on the plating layer; the base body pretreatment in the first step comprises the following sub-steps of alkali washing and oil removal, wherein the picking ingot is soaked in a NaOH solution with the concentration being 45-55 g / L. According to the method, high-density hydroxyl active sites are constructed on the surface of the metal base material through a plasma activation process, strong chemical bonding is formed between a plating layer and the base material, and the interface bonding strength is remarkably improved.

The invention relates to the technical field of corrosion resistance, in particular to a corrosion-resistant and wear-resistant copper insert and a preparation method thereof.The copper insert is subjected to plating treatment in an ionic liquid electroplating mode, then the surface of a plating layer is subjected to hole sealing treatment, and a nickel-copper-composite halloysite nanotube layer is electrically deposited on the surface of the formed copper insert; the preparation method comprises the following steps: taking a halloysite nanotube as a nano loader of a corrosion inhibitor, and coating with dopamine to obtain a composite halloysite nanotube; in the hole sealing liquid, the composite halloysite nanotube is used as a filler, silane modified polyurethane is used as a base material, the silane modified polyurethane is a prepolymer synthesized by using isophorone diisocyanate and polytetramethylene ether glycol as raw materials, octylamine ring-opened 3-(2, 3-epoxypropoxy) propyltrimethoxysilane is used as a chain extender, and the silane modified polyurethane is used as the base material. And 2-(perfluorodecyl) ethanol and aminopropyltriethoxysilane are used as end-capping reagents, so as to prepare the high-temperature-resistant coating.

The invention relates to a resistance conductive material as well as a preparation method and application thereof. The resistance conductive material comprises a copper foil layer, a transition layer and a resistance layer from bottom to top, the resistance layer comprises a dispersion reinforcing phase and a homogeneous phase; the dispersion enhancing phase is subjected to surface pretreatment before being added into the electroplating liquid. According to the invention, the transition layer and the dispersion reinforcing phase are introduced, the diffusion of copper into the resistance layer is inhibited through the synergistic effect of the transition layer and the dispersion reinforcing phase, the high resistivity of the resistance layer is maintained, and the application prospect is good.

The invention relates to a bypass device (1), an electrically conductive bypass conductor (3), and a first machine element (12), wherein the bypass conductor (3) is in contact with the first machine element (12), the first machine element being contacted by the bypass conductor (3) at a contact surface (K), and the contact surface (K) comprising a layer system (3) electroplated onto the first machine element (11), wherein the layer system (3) optionally comprises a first layer (3a) arranged on the first machine element (11) and at least one second layer (3b) arranged on the first machine element (11) or, if present, on the first layer (3a), wherein the optional first layer (3a) is formed of copper or nickel, and the at least one second layer (3b) is formed of an alloy comprising at least two of the elements tin, copper, nickel, silver, zinc, bismuth, antimony, cobalt, manganese, and tungsten.where the alloy contains non-metallic particles, including a comprehensive number of electrically conductive particles.

The present invention discloses a Ni‑Se‑C hydrogen evolution electrode and a preparation method thereof, belonging to the technical field of electrocatalytic hydrogen evolution. The Ni‑Se‑C hydrogen evolution electrode is composed of a conductive substrate and a Ni‑Se‑C coating electroplated on the surface of the conductive substrate. First, the conductive substrate is pretreated in the present invention; then, Ni, Se, and C elements are deposited on the pretreated conductive substrate by electroplating to form a Ni‑Se‑C hydrogen evolution electrode with excellent hydrogen evolution performance. The synthesis method of the present invention is simple and the catalytic layer structure is stable. The synthesized Ni‑Se‑C hydrogen evolution electrode can be widely applied to the industrial production of hydrogen by electrolyzing water, and has significant practical value and economic value.

The invention discloses a carbon-material-doped titanium-based tin-antimony-nickel composite coating electrode and a preparation method and application thereof.The specific process includes the steps that a titanium sheet is pretreated, the treated titanium sheet is placed in electro-deposition liquid to be subjected to constant-temperature pulse electro-deposition, the titanium sheet is dried through a drying oven and then roasted in a muffle furnace, and a carbon-material-doped middle layer is obtained; and then the carbon material doped titanium-based tin-antimony-nickel composite coating electrode is obtained through cyclic thermal oxidation and quenching processes. According to the preparation scheme provided by the invention, the electrode surface is thick and rough, has a large number of defects and is excellent in electrocatalytic activity. Compared with a single coating, the composite coating has longer service life and higher ozone generation efficiency in the application of preparing ozone by electrolyzing water.

The invention relates, inter alia, to a dispersion electrolyte for the electroplating of particle-containing tin alloy layers. The dispersion electrolyte comprises 2 to 100 g / L tin ions; 1 to 100 g / L ions of a second alloying element selected from copper, silver, bismuth, nickel, cobalt, cadmium, zinc, manganese, and combinations thereof; 1 to 200 g / L at least one type of particle selected from inorganic piezoelectric particles, electrically conductive ceramic particles, and combinations thereof; at least one dispersant selected from anionic dispersants, nonionic dispersants, and combinations thereof; and water. The pH value is 7 or lower. The dispersion electrolyte can be used to electroplaten a particle-containing tin alloy layer onto a metallic or metallized substrate.

The invention discloses a tungsten alloy wire which is composed of a tungsten alloy bus and a self-lubricating composite coating, and the self-lubricating composite coating sequentially comprises a pre-coating and a composite coating from inside to outside. The method has the beneficial effects that on one hand, the tungsten alloy bus is subjected to etching treatment through concentrated hydrochloric acid or hydrofluoric acid, and meanwhile, the pre-plating layer is added, so that the binding force between the electroplated layer and the tungsten alloy wire is enhanced; meanwhile, the lubricating composite coating is prepared by adding solid lubricating particles into the electroplating liquid for composite electroplating, so that the die loss in the drawing process is effectively reduced, and the cost is saved; and on the other hand, a nickel aminosulfonate pre-plating process is changed, and impact nickel is used as a pre-plating bottom layer of the diamond wire, so that the binding force of the grinding composite coating and the diamond wire bus is improved, and the problems of wire breakage or silicon wafer scratching and the like caused by falling of the grinding composite coating in the cutting process of the diamond wire can be prevented.

The invention relates to the technical field of substrate material surface plating, in particular to a method for electrochemical plating of a perovskite thin film through an ionic electrolyte, and the method comprises the following steps: S1, preparing the ionic electrolyte containing a double-complexing agent system and a two-dimensional nano filler; s2, the ion electrolyte and the substrate are placed in a rotating magnetic field for a pulse electrodeposition process, and ultrasonic waves are applied to the bottom of the rotating magnetic field; s3, adopting an asymmetric third-order pulse waveform in the pulse electrodeposition process; s4, in the pulse electrodeposition process, synchronizing terahertz time-domain spectroscopy and confocal Raman imaging to monitor grain boundary defects of the deposition layer; and S5, entering an annealing stage after the process is ended, and introducing pyrrolidone steam to form a C-N bond passivation layer. According to the method, the ion electrolyte containing the specific double complexing agent system and the two-dimensional nano filler is accurately prepared, so that the uniformity and efficiency of the plating process are improved, and the stability of the ion electrolyte is ensured.

The utility model discloses a uniform sanding device for a diamond production line saw, and belongs to the technical field of sanding devices. A uniform sand feeding device for a diamond production line saw comprises an electroplating box and further comprises supporting rods fixedly connected to the two sides of the electroplating box, and the supporting rods are rotationally connected with power-on guide wheels; a steering guide wheel is rotationally connected into the electroplating box; a liquid storage tank is fixedly connected to the upper part of the electroplating box and is used for extracting electroplating liquid at the bottom of the electroplating box to circularly flow; a rotating shaft is rotationally connected to the liquid storage tank, the rotating shaft extends into the electroplating tank, and a plurality of groups of second stirring rods are fixedly connected to the rotating shaft located in the electroplating tank; according to the utility model, carborundum in the electroplating liquid can be prevented from depositing at the bottom of the electroplating box to influence the electroplating quality, so that the carborundum in the electroplating liquid is more uniformly distributed, and meanwhile, the consumed carborundum in the electroplating box can be supplemented at any time, so that the concentration of the carborundum in the electroplating liquid is always within a certain range, and the electroplating effect is improved.

The invention discloses high-strength stainless steel for a wheel hub cover and a machining process of the high-strength stainless steel, and relates to the technical field of stainless steel machining. The specific processing technology comprises the following steps: weighing a stainless steel raw material, smelting under nitrogen pressurization, carrying out protective pouring to obtain a cast ingot, carrying out hot forging and hot rolling to obtain a hot-rolled plate, carrying out solution treatment and water quenching, sequentially carrying out multi-pass cold rolling and single-pass liquid nitrogen heat preservation cold rolling, annealing and aging treatment to obtain a stainless steel base material, and sequentially carrying out grinding, polishing, oil removal and acid activation to obtain the stainless steel plate. And then placing in an electroplating solution for electro-deposition of an alloy plating layer, cleaning after electro-deposition is finished, then carrying out laser cladding, finally carrying out heat treatment, and cutting a thin layer to obtain the high-strength stainless steel. Wherein cladding powder adopted for laser cladding comprises cobalt powder, chromium powder, nickel powder, aluminum powder, molybdenum powder, titanium powder, zirconium powder, nano carbon-nitrogen metal and tungsten carbide.

The invention discloses a terminal and a terminal manufacturing method. The terminal comprises a terminal body which is provided with a matching part used for being matched with a matching terminal. A first bottom plating layer and a first silver graphite plating layer formed on the first bottom plating layer are formed on the contact surface of the matching part of the terminal body. Graphite particles are uniformly dispersed in the first silver graphite plating layer, so that the wear resistance and the conductivity of the matching part of the terminal body are improved. According to the invention, the silver graphite plating layer has excellent wear resistance and conductivity, can greatly improve the matching times of the terminal and the matching terminal, and can reduce the plugging resistance between the terminal and the matching terminal.

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 particularly discloses a battery steel shell electroplating process. A battery steel shell electroplating process comprises the following steps that S1, a steel shell is subjected to pre-cleaning treatment; s2, the pre-cleaned steel shell is placed in a primary electroplating solution to be subjected to primary electroplating operation; the primary electroplating solution comprises 280-300 g / L of nickel sulfate; the electroplating temperature in the primary electroplating operation is 40-45 DEG C, the current density is 40-60 mA / cm < 2 >, and the nickel-plated steel shell is obtained after the primary electroplating operation is finished; s3, the nickel-plated steel shell is placed in a secondary electroplating solution to be subjected to secondary electroplating operation; the electroplating temperature in the secondary electroplating operation is 50-55 DEG C, the current density is 25-40 mA / cm < 2 >, a nickel / titanium composite layer is formed on the surface of the nickel-plated steel shell, and the battery steel shell is obtained; wherein the secondary electroplating liquid is obtained by mixing the electroplating liquid obtained after the primary electroplating operation is finished with an additive; the additive comprises nano titanium dioxide. The method has the advantage of improving the binding force, corrosion resistance and wear resistance of the coating on the surface of the steel shell.

The invention discloses a hydrogen-corrosion-resistant coating material for a hydrogen-rich electrolyte environment and a preparation method thereof, and relates to the technical field of hydrogen-corrosion-resistant coating materials, the coating material comprises the following components by weight: a metal matrix reinforcing material: 30%-50% of nickel and 5%-10% of cobalt; the ceramic particles comprise 10%-20% of aluminum oxide and 5%-15% of The coating material disclosed by the invention shows excellent corrosion resistance, wear resistance and hydrogen embrittlement resistance in a hydrogen-rich electrolyte environment. The nickel-cobalt alloy layer is kept stable at high temperature and high pressure, hydrogen permeation is blocked, and material degradation is prevented. Aluminum oxide and silicon carbide improve the hardness and wear resistance of the coating, and the coating is kept intact in temperature circulation. The rare earth elements yttrium oxide and cerium oxide enhance the oxidation resistance and hydrogen embrittlement resistance. And the dispersing agent and the cross-linking agent further improve the uniformity, compactness and adhesion of the coating, so that the coating is suitable for industrial parts in high-pressure and high-stress environments.

The invention discloses an electroplated part, an electroplated part manufacturing method and a connector. The electroplated part comprises a base material; a nickel plating layer formed on the surface of the base material; the tin-graphite composite plating layer is formed on the nickel plating layer; the nickel plating layer is formed on the base material, the tin-graphite composite plating layer is formed on the nickel plating layer, the tin plating layer is formed on the tin-graphite composite plating layer, the nickel plating layer serves as a bottom plating layer of the base material, the tin plating layer serves as an outer plating layer of the base material, and the tin-graphite composite plating layer serves as a middle plating layer of the base material. According to the invention, the graphite particles exposed from the tin-graphite composite coating are partially or completely wrapped by the outermost tin coating, so that the graphite particles are not easy to fall off, the wear resistance and corrosion resistance of the electroplated part are improved, and the service life of the electroplated part is prolonged. In addition, the plating layer structure also has a relatively low friction coefficient, so that the insertion and extraction force of the electroplated part in the use process can be greatly reduced.

The invention discloses a high-strength wear-resistant aluminum alloy manufacturing method which comprises the following steps: S1, nano particles are added into a precursor solution material of a ceramic coating; s2, dispersing nanoparticles in the precursor solution of the ceramic coating to form a uniformly mixed coating material; s3, a coating method is adopted, and the surface of the aluminum alloy is evenly coated with the evenly-mixed coating material; and S4, curing treatment is carried out, so that the coating material forms a stable and compact nano ceramic coating on the surface of the aluminum alloy. According to the manufacturing method of the high-strength wear-resistant aluminum alloy, the produced product has the characteristics of being excellent in performance and high in adaptability.

The invention belongs to the technical field of grinding materials and grinding tools, and particularly relates to a diamond electroplated grinding wheel directionally arranged in a magnetic field and a preparation method and application thereof. Firstly, electroplating liquid is added into an electroplating bath, then 30%-40% of magnetic diamond abrasive materials are added into the electroplating liquid, directional magnetic sanding is carried out with the grinding wheel base body A as a cathode and a nickel plate as an anode, the magnetic field intensity is controlled to be 0.1-1 T, the cathode current density is controlled to be 0.4 A / dm < 2 >-0.6 A / dm < 2 >, the electroplating time is 10-20 min, and a grinding wheel base body B is obtained; removing floating sand from the grinding wheel base body B to obtain a grinding wheel base body C; and the grinding wheel base body C is thickened to obtain a grinding wheel base body D, and the grinding wheel base body D is modified to obtain the grinding wheel. The grinding rate of the manufactured grinding wheel is reduced by 10%-25%, the service life is prolonged by 30%-50%, the machined surface roughness (Ra) can reach 0.3 micrometer or below, and the machined surface precision is reduced by 10%-25%. The grinding wheel is applied to nanoscale grinding of optical glass, sapphire and silicon carbide wafers and forming machining of turbine blade mortises and ceramic matrix composites, and the precision and roughness of the grinding wheel can be effectively guaranteed.

The invention discloses a high-thermal-conductivity copper-based graphene composite alloy and a preparation method thereof, and belongs to the field of high-thermal-conductivity alloy materials. The alloy is composed of an additive manufacturing copper-graphene composite porous channel framework, few layers of graphene on the surface of a porous channel and a copper-graphene nanosheet composite material filler in the porous channel. The preparation method of the alloy comprises the steps that firstly, graphene nanosheets and pure copper powder are mechanically mixed, and then a matrix of a microchannel structure arranged in a personalized directed array mode is constructed through the additive manufacturing technology; depositing a few layers of graphene on the surface of the micro-channel by using a chemical vapor deposition method, or alternately depositing a few layers of graphene and a pure copper or copper-graphene mixed layer on the surface of the micro-channel by using the chemical vapor deposition method and an electrodeposition method respectively; and finally, filling the micro-channel with liquid pure copper or a mixture of liquid pure copper and graphene nanosheets or omitting the step. According to the high-thermal-conductivity alloy material for heat dissipation of the power electronic unit of the new energy automobile, the thermal conductivity of the alloy material is improved through the directionality of graphene arrangement on the surface of the additive manufacturing porous channel structure, and the high-thermal-conductivity alloy material has important economic value and energy-saving benefits.

A plating method includes: providing a nickel-containing plating solution; immersing a metallic substrate in the plating solution; and applying a voltage between the substrate and an anode to apply a plating. The providing comprises blending chromium powder with a precursor of the plating solution so that the plating solution is a Cr-containing plating solution. The as-applied plating forms a layer containing chromium particles from the powder.

The invention belongs to the field of new materials, and discloses a preparation process for co-depositing a metal (at) RGO composite material under the action of an electric field, which comprises the following steps: step 1, adding an electroplating solution containing graphene oxide and soluble metal salt into an electrolytic bath for electroplating deposition, and intermittently collecting sediments; metal ions in the soluble metal salt can be reduced under the action of an electric field; 2, the sediment is cleaned and then smashed; and (3) calcining the product crushed in the step (2) in a reducing atmosphere to obtain the metal (at) RGO composite material consisting of a metal simple substance and graphene. According to the process, an electrochemical deposition method is combined with a proper crushing method, and graphene oxide is reduced, so that the friction material meeting the requirements can be obtained. Meanwhile, the invention also provides related application of the material.

The utility model provides a diamond fretsaw electroplating liquid purification treatment device which comprises a diamond abrasive particle recovery tank, a pretreatment tank, an electrolytic tank, a purification tank and a medicine storage tank, a filter screen is arranged in the diamond abrasive particle recovery tank, and an impurity discharge port, a liquid inlet pipe and a flushing water inlet pipe are arranged on the side wall of the top of the diamond abrasive particle recovery tank. A liquid discharge pipe is arranged on the side wall of the diamond abrasive particle recovery tank below the filter screen; an aeration pipe and a constant-temperature heating pipe are arranged at the bottom of the pretreatment tank, an activated carbon storage bin is arranged at the top of the pretreatment tank, and a feeding pipe with an electromagnetic valve is arranged at the bottom of the activated carbon storage bin; an anode plate and an electrolysis plate are arranged in the electrolytic tank and are electrically connected with the positive electrode and the negative electrode of the power supply respectively, a fine filter is arranged between the electrolytic tank and the purification tank, and the medicine storage tank is connected with a medicine feeding pump which is communicated with the electrolytic tank through a conveying pipe. The device is simple in structure, the diamond abrasive particles can be recycled while the electroplating liquid is purified, and the production cost of the diamond fretsaw is remarkably reduced.

Traditional air cooled fin heat sinks, which contain heat pipes, are generally able to evacuate the heat adequately from electronic devices at low power. However, some restrictions like a high thermal resistance at high powers and an early dry-out limit their usage in new generations of CPU and GPU. The present disclosure relates to a porous coating capable of increasing the thermal performance of data processors. The coating can be applied to after-market off-the-shelf processors and increase the thermal performance in pool boiling applications. The coating can be a multi-scale electroplated porous (MuSEP) coating that increases boiling efficiency.

A diamond wire multi-wire production system with an automatic current adjusting function comprises a broken wire detection device, a wire unwinding device, a wire winding device, a plurality of process structures and a control system, wherein the wire unwinding device and the wire winding device are used for winding and unwinding diamond wires, and the process structures are sequentially arranged between the wire winding device and the wire unwinding device along the diamond wires. And the control system monitors the state of the broken wire detection device to judge the broken wire state of the diamond wire, and correspondingly adjusts the current of the process structure according to the broken wire state of the diamond wire. According to the invention, the process current is automatically adjusted through the control system according to the line breaking information, the instability and the line breaking rate of the product during the period from line breaking of the production line to manual current modification are reduced, the instability of the product quality caused by errors of manual current modification is avoided, and the labor cost is reduced.

The present invention relates to a method of preparing a composite material, in particular one useful as a catalyst in an electrolytic hydrogen evolution reaction and / or the oxygen evolution reaction and / or urea oxidation-assisted water electrolysis. Provided is a method of preparing a composite material, the method comprising the steps of: (i) electrochemically depositing material onto a substrate from a deposition solution comprising a nickel (II) salt and graphene oxide, to obtain a nickel-reduced graphene oxide composite material comprising nickel dispersed on reduced graphene oxide, said composite material being deposited on the substrate; (ii) after step (i), placing the substrate, having the nickel-reduced graphene oxide composite deposited thereon, in an alkaline solution along with a counter electrode; and (iii) after step (ii), partially electrochemically oxidising the nickel, to obtain a partially oxidised nickel-reduced graphene oxide composite material comprising partially oxidised nickel dispersed on reduced graphene oxide, said composite material being deposited on the substrate. The composite of the invention demonstrates high catalytic activity for electrolytic hydrogen production under alkaline water electrolysis conditions (for example, a hydrogen evolution current of up to 500 mA cm-2 at -1.35 V against a Reversible Hydrogen Electrode). High activity is demonstrated even when the substrate (on which the composite is deposited) does not contain any, or at most trace amounts, of nickel. Thus, the electrode of the invention (that is, the combination of composite material and substrate) demonstrates higher catalytic activity per unit mass of nickel compared to previous electrodes based on nickel foam. The invention also provides a composite material, an electrode, a method of electrolytic hydrogen and / or production under alkaline electrolysis conditions, and a method of electrolytic urea oxidation under urea oxidation-assisted water electrolysis conditions, thereof.

The invention discloses a forming method of an integrated metal structural part and the integrated metal structural part. The forming method comprises the following steps that firstly, stainless steel 316L powder is selected as metal powder, and aluminum oxide nano powder is selected as ceramic nano powder; 2, injecting the slurry into a preheated mold, and after injection is completed, keeping the pressure in the mold for 5-10 seconds to ensure that the slurry fully fills the mold and is cured; thirdly, the injection-molded product is subjected to heat treatment, and the surface of the taken-out operation panel is in a rough state; 4, preparing a silver nanoparticle self-repairing coating; 5, depositing the nano-particles on the surface of the nano-metal ceramic composite material to form a coating by adopting an electrophoretic deposition method and utilizing the action of an electric field; sixthly, the self-repairing coating is subjected to curing treatment; and seventhly, the cured coating is ground and polished. The problem that the operation panel is poor in abrasion resistance and corrosion resistance after being used for a long time is solved.

The invention discloses an efficient and stable electroplating hydrogen evolution electrode and a preparation method and application thereof. The preparation method comprises the following steps that S1, a conductive substrate material is prepared and pretreated; s2, an electroplating solution is prepared, wherein the electroplating solution comprises a solvent, nickel salt, hypophosphite, a buffering agent and a complexing agent; and S3, three-electrode deposition is carried out with the electroplating liquid as an electrolyte and the pretreated conductive substrate material as a working electrode, and the efficient and stable electroplating hydrogen evolution electrode is obtained. The prepared electrode is a phosphate material with an amorphous structure, has a larger catalytic interface and more reaction active sites, and is beneficial to rapid diffusion of ions or small molecules due to the fact that open active pore channels of the electrode form permeable channels; through the synergistic effect of electrochemical parameters, the composite material has the capability of being stable for a long time under high current density. The preparation method disclosed by the invention is simple to operate, low in cost, low in equipment and process condition requirements and easy for industrial large-scale production.

The invention discloses a compound dispersing agent, a mixed electroplating solution and application, the compound dispersing agent comprises a first anionic surfactant, a second anionic surfactant and a nonionic surfactant, and the first anionic surfactant comprises a sulfonate compound; and / or the second anionic surfactant comprises one or more of betaine or carboxylate; and / or the nonionic surfactant comprises one or more of a naphthoquinone sulfonate formaldehyde condensation compound, a melamine-formaldehyde condensation compound and methylnaphthalene sulfonic acid formaldehyde condensation compound sodium salt. In the compound dispersant, the first anionic surfactant plays a role in surface wetting and dispersing, the second anionic surfactant plays a role in main dispersing, and the nonionic surfactant plays a role in surface active wetting, so that the compound dispersant disclosed by the invention has good synergism; the graphene dispersing agent plays a role in dispersing graphene in a plating solution system, plays a certain positive role in ion migration in the plating solution, and does not cause poisoning harm to the plating solution.

The invention provides a pulse-direct current electrochemistry composite deposition process of a nickel-tungsten-phosphorus alloy coating, and belongs to the technical field of coating preparation, and the pulse-direct current electrochemistry composite deposition process comprises the following steps: carrying out silane coupling agent modification treatment on alpha-aluminum oxide; carrying out modification treatment on the hexagonal boron nitride nanosheet by adopting hexadecyl trimethyl ammonium bromide; carrying out polyacrylic acid modification treatment on the nano silicon dioxide; nickel salt, tungsten salt, phosphorus salt, a complexing agent, a buffering agent, a primary brightener, a secondary brightener, a wetting agent, modified aluminum oxide, modified boron nitride, modified silicon dioxide and deionized water are mixed, stirred and heated, and a composite plating solution is obtained; the substrate serves as a cathode, pulse current is applied to the substrate for pulse electroplating, then the current density of the pulse current is continuously and linearly reduced to a target value, and finally direct current electroplating is conducted under the target value; by optimizing the formula of the composite plating solution and the pulse-direct current composite electroplating process, the nickel-tungsten-phosphorus alloy composite plating layer with high hardness, low friction, high wear resistance and corrosion resistance is finally obtained.