599results 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 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 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 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 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 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 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 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.

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 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.

The invention discloses a preparation method of an electric brush silver plating-graphite composite coating, which comprises the following steps: 1) sequentially carrying out activation and electric purification pretreatment on a substrate, and then carrying out surface modification on the pretreated substrate by using a dispersing agent to obtain a surface-modified substrate; 2) setting a closed area for the surface-modified substrate; and (3) the closed area is subjected to silver pre-plating treatment, and a silver pre-plating base body is obtained. According to the invention, the problem that the graphite content in the plating layer is low when the voltage is high when the silver-graphite composite plating layer is plated by an electric brush is solved, so that the production efficiency is greatly improved.

The invention relates to a hub type dicing blade and a preparation method thereof.The hub type dicing blade comprises a base body and a composite coating, a cooling channel is formed in the base body, two liquid inlet holes are correspondingly formed in the inner side of the base body, a plurality of liquid outlet holes are formed in the outer side of the base body in the circumferential direction, the liquid inlet holes and the liquid outlet holes communicate with the cooling channel, an inclined face is formed on the surface of one side of the base body, and the composite coating is arranged on the outer side of the base body. A plane is arranged on the side, away from the inclined face, of the base body, and the composite coating is arranged on the plane. The preparation method comprises the following steps: S1, preparing a mounting body blank and a cutter body blank; s2, the mounting body blank and the cutter body blank are machined; s3, welding the mounting body blank and the cutter body blank to obtain a scribing cutter blank; s4, a liquid outlet hole and a mounting groove are machined in the scribing cutter blank, and a base body is obtained; s5, pre-plating the base body; s6, electroplating the substrate; and S7, the base body is subjected to grinding, edging, alkali etching and chemical polishing. According to the invention, the high-ductility material is prevented from adhering to the cutting edge abrasive material, and the risks of back collapse, back crack and side collapse of the wafer are effectively reduced.

The invention relates to the technical field of new energy material and electrochemical device manufacturing, and discloses a graphene-based functional nano-composite electrode preparation system based on AI parameter optimization, which integrates physical modules such as intelligent material supply, synthesis modification, slurry forming, post-treatment and the like with online characterization equipment into a whole. And closed-loop control is realized through the central AI optimization unit. And the central AI unit establishes a prediction model of process parameters and electrode performance by utilizing a deep neural network, reversely optimizes the process parameters according to performance requirements by adopting a multi-target optimization algorithm, and drives a system to iteratively execute a'preparation-test-optimization 'cycle until a high-performance electrode meeting a target is obtained. According to the method, automatic, accurate and efficient reverse design from performance requirements to process parameters is achieved, the problems that a traditional preparation method depends on experience and is low in efficiency and poor in repeatability are solved, and the research and development efficiency and the product performance limit of the electrode material are remarkably improved.

The invention belongs to the technical field of metal material plating, and particularly relates to a connector surface composite coating and a preparation process thereof, and the preparation process comprises the following steps: adding modified carbon black and sodium molybdate into deionized water, stirring to obtain a corrosion inhibition material, and mixing with modified zinc oxide to obtain a mixed filler; the preparation method comprises the following steps: adding dibutyltin dilaurate and toluene diisocynate into polypropylene glycol to obtain a core material; adding hexadecyl trimethyl ammonium bromide and the mixed filler into a 93-96 wt% ethanol solution, adding the core material for emulsification, adding an isophorone diisocyanate solution, and stirring to obtain a microcapsule; nickel sulfate hexahydrate, nickel chloride hexahydrate, sodium citrate, boric acid, a surface dispersant, a sodium hydroxide solution and microcapsules are added into deionized water to be mixed, and an electroplating solution is obtained; and putting the connector into the electroplating solution for electroplating to obtain the composite coating. The expansion of pitting corrosion can be inhibited, and the long-term use reliability and stability of the connector in a marine environment are improved.

The invention discloses a porous copper-graphene composite current collector for a lithium battery, and also discloses a preparation method of the composite current collector, and the preparation method comprises the following steps: preparing an electroplating copper electrolyte, adding graphene into the electroplating copper electrolyte, and uniformly dispersing the graphene to obtain an electroplating copper-graphene electrolyte; placing a copper foil in the electrocoppering-graphene electrolyte for electroplating treatment to obtain a Cu-Gr foil of which the surface is uniformly coated with a copper-graphene composite layer; the Cu-Gr foil is placed in an electrogalvanizing electrolyte for electrogalvanizing treatment, on the basis of the copper-graphene composite layer, a zinc layer is coated, and the Cu-Gr / Zn foil of a double-layer structure is obtained; carrying out solution treatment on the Cu-Gr / Zn foil to obtain a porous copper precursor; and carrying out dealloying treatment on the porous copper precursor, and dissolving zinc in the porous copper precursor to obtain the porous copper-graphene composite current collector. The composite current collector has a cross-scale synergistic distribution pore structure, and the binding force between the graphene and the copper substrate is strong.

A biomimetic desert beetle self-transporting bone microgrinding head and a preparation process thereof, and relates to the field of medical instruments. The microgrinding head includes a hydrophobic matrix or a matrix having a hydrophobic plating layer. The matrix has a hydrophobic surface on which several hydrophilic abrasive particles are uniformly distributed. A process for preparing the microgrinding head is: selecting diamond abrasive particles and conducting oxidization treatment of the diamond abrasive particles; forming a hydrophobic matrix by scanning a surface of the matrix with a laser; or alternatively obtaining a hydrophobic plating layer by a chemical modification method; and combining the oxidized diamond abrasive particles with the hydrophobic matrix or the hydrophobic plating layer by electroplating to obtain a microgrinding head. The microgrinding head utilizes to achieve an effect of being capable of cooling rapidly and capturing cooling medium droplets and effectively transporting the droplets to a grinding arc region.

The invention relates to a forming method for composite electroplating of an MEMS (Micro Electro Mechanical System) probe. Structural patterns of a needle tip or / and a needle body are / is photoetched through a micro-electro-mechanical process, the needle tip or / and the needle body is / are formed through electroplating of a composite plating solution after pretreatment, the composite plating solution is obtained by mixing a metal base solution and a turbid liquid, the metal base solution is a nickel base solution and / or a rhodium base solution, and the turbid liquid is a nickel base solution and / or a rhodium base solution. The suspension is formed by suspending nano-powder in water through a dispersing agent. Compared with the prior art, the technology provided by the invention has the following advantages that the MEMS process technology is combined with the composite plating solution to be used for various probe structures, and the performance of the prepared material is greatly improved compared with that of a pure metal coating; the composite plating solution prepared from the plating solution and the second-phase particles is high in stability, and the electroplating process is easy to operate; the nickel-based composite plating solution can be used for obtaining a main body material with higher hardness, better wear resistance and better flexural property; the rhodium-based composite plating solution is used for preparing a needle point material, has higher hardness and wear resistance, and improves the brittle fracture problem.

The utility model belongs to the technical field of diamond fretsaw machining, and particularly relates to electroplating equipment for diamond fretsaw machining, which comprises a bottom plate, a cleaning box, an electroplating device, an electroplating device and an electroplating device. The electroplating box is fixedly mounted at the top of the bottom plate, inlets and outlets are formed in the inner walls of the tops of the cleaning box and the electroplating box, and liquid outlets fixedly communicate with the rear sides of the cleaning box and the electroplating box; the number of the stand columns is two, and the bottom ends of the two stand columns are fixedly installed on the top of the bottom plate; the left end and the right end of the electric sliding rail are fixedly installed between the two stand columns respectively, switching between cleaning and electroplating of the diamond wire is achieved through a simple structure, manual operation transposition of personnel is not needed, meanwhile, drying operation after cleaning and electroplating of the diamond wire can be achieved, the drying efficiency is improved, and the working efficiency is improved. The machining process is high in automation degree, time-saving and labor-saving, and the electroplating efficiency and effect are greatly improved.

The invention discloses a preparation method of a Ni / Ni (OH) 2 heterojunction nano electrocatalyst and application of the Ni / Ni (OH) 2 heterojunction nano electrocatalyst in hydrogen production. The method comprises the following steps: preparing a eutectic solvent; then adding nickel salt, heating and stirring to fully dissolve the nickel salt without crystal precipitation; adding an imidazole additive, and uniformly stirring to obtain an electrolyte; the electrolyte is added into an electrolytic bath for electro-deposition, and a uniform and compact Ni / Ni (OH) 2 heterojunction layer is gradually deposited on the surface of a cathode; and cleaning, drying and activating the cathode electrode to obtain the catalyst. According to the preparation method, imidazole is introduced into a choline chloride-ethylene glycol eutectic solvent system, and an electro-deposition technology is adopted, so that synchronous deposition and interface bonding of nickel and nickel hydroxide are realized at one time, the Ni / Ni (OH) 2 heterojunction is obtained, and a tedious multi-step process in a traditional method is avoided; in addition, the high efficiency and long-term stability of the catalyst for catalyzing the hydrogen evolution reaction are improved, and good repeatability and industrialization potential are achieved.

A blade (20) has an airfoil (22) having a tip (26). The blade (20) has a metallic substrate (80) and a coating system atop the substrate (80) at the tip (26). The coating system has: a first layer (110) of at least 99.0% weight nickel; an abrasive layer (114) having a matrix (118) and an abrasive (116) at least partially embedded in the matrix (118); and a second layer (112) between the first layer (110) and the matrix (118). The second layer (112) is tougher or more ductile than at least one of the first layer (110) and the matrix (118).

The invention provides diamond wire electroplating equipment, and relates to the technical field of diamond wire electroplating equipment.The diamond wire electroplating equipment comprises a base, a dismounting and mounting structure, a mounting structure and an adjusting structure, a frame is mounted on the upper surface of the base, two anode cell bodies are arranged in the frame, and the two anode cell bodies are connected with the frame through the mounting structure; a connecting frame and a fixing frame are installed on the upper surfaces of the two ends of the base correspondingly, conductive cathodes are installed at the upper ends of the connecting frame and the fixing frame correspondingly, an unwinding section roller system is installed at the end, away from the frame, of the connecting frame, and a circulating liquid storage box is installed at the end, away from the unwinding section roller system, of the base; a connecting frame is arranged at the end, away from the circulating liquid storage tank, of the base. The reel can be replaced quickly, the downtime of equipment can be greatly shortened, continuous operation of a production line is kept, and therefore the overall production efficiency is improved. Especially in a production environment in which reels need to be replaced frequently, reduction of downtime is crucial.