162results about "Electrolytic organic material coating" patented technology

The invention discloses a graphene / polyaniline composite film with a gradient structure and a preparation method and application thereof, the preparation method comprises the following steps: S1, preparing a coating template, and uniformly coating the coating template with a graphene oxide dispersion liquid to obtain a graphene oxide porous template; s2, performing electrochemical reduction on the graphene oxide porous template to obtain a reduced graphene oxide porous template; and S3, carrying out polyaniline electrodeposition on the reduced graphene oxide porous template to obtain the graphene / polyaniline composite film with a gradient structure. The graphene / polyaniline composite film prepared by the invention has a gradient structure, and can improve various ion energy storage characteristics and conductivity of the material.

The invention discloses a cortisol and sodium ion difunctional detection sensor and a preparation method thereof, and belongs to the technical field of sensing detection, the cortisol and sodium ion difunctional detection sensor comprises a substrate layer, a sodium ion detection module and a cortisol detection module, the bionic micro-fluidic unit is provided with a plurality of runner holes, and an embedded capillary pump structure is arranged in each runner hole so as to guide liquid to be detected to the sodium ion detection module and the cortisol detection module; and the shielding layer covers the surface of the bionic micro-fluidic unit. The sodium ion detection module and the cortisol detection module are specifically designed, so that wide-range detection of sodium ion concentration and low-concentration detection of cortisol are realized, a high-altitude low-pressure environment of a pilot can be matched, the sodium ion concentration and the cortisol concentration of the pilot can be accurately detected, and the detection accuracy is improved. Accurate detection of the signs of the pilot in the high-altitude flight process is achieved.

The invention discloses a bionic lantern frame composite internal fixing device and a preparation method, and relates to the technical field of orthopedic medical instruments, the bionic lantern frame composite internal fixing device comprises an implant and a multi-rod bridging structure, the multi-rod bridging structure is composed of a plurality of longitudinal connecting rods and transverse locking nails, and the implant is composed of a plurality of multi-level bionic structures; the multi-layer bionic structure comprises two hexagonal upper and lower layer structures which are symmetrically arranged and a middle spiral layer structure arranged between the two hexagonal upper and lower layer structures. According to the invention, inspired from honeycomb and ox horn macro-microstructure, the multi-level bionic structure prepared by adopting a coupling bionic technology has excellent mechanical properties and strong buffering and vibration absorbing capabilities, can be effectively matched with the mechanical properties of natural bones, and can effectively avoid secondary injury and stress shielding effect after implantation of a patient; the composite coating introduced through an electrochemical deposition method solves the problems that a single implant structure is insufficient in biocompatibility, insufficient in antibacterial property and weak in osteogenic differentiation capacity.

The invention belongs to the technical field of surface engineering protective coatings, and discloses a nitrogen heterocyclic compound modified corrosion-resistant high-entropy alloy coating as well as a preparation method and application thereof. The preparation method comprises the following steps that firstly, a magnetron sputtering technology is adopted, a CoCrFeMnNi target serves as a cathode target material, and a corrosion-resistant high-entropy alloy coating is obtained through deposition on the surface of a base body; and then, in a three-electrode system, the corrosion-resistant high-entropy alloy coating is placed in an electrolyte containing a nitrogen heterocyclic onium salt compound to be subjected to electro-deposition, and the nitrogen heterocyclic compound modified corrosion-resistant high-entropy alloy coating is prepared. The corrosion-resistant inorganic-organic hybrid coating prepared by the invention has excellent corrosion resistance, can keep high stability and durability in a complex corrosion environment, and has relatively high corrosion potential and relatively low corrosion current density. The coating can remarkably prolong the service life of a structural base material, is suitable for various harsh working conditions, and provides an efficient and reliable protection solution for industrial application.

The invention belongs to the field of electrochemistry, and discloses a self-growing solid electrolyte interface in an electrolysis process and application of the self-growing solid electrolyte interface in aniline production. The method comprises the following steps: dissolving nitrobenzene, 2-piperidone, lithium bromide and tris (N, N-tetramethylene) phosphamide in an organic solvent to obtain an electrolyte, and placing the electrolyte in a single-chamber electrolytic tank provided with an anode and a cathode for electrolysis, so that a solid electrolyte interface automatically grows on the cathode along with electrolysis and generates electrocatalytic activity. According to the method, hydrogen is not used, so that the risks of combustion and explosion are avoided; the device can be coupled with clean energy power generation, and is environment-friendly and sustainable; the device is simple, the size of the device is obviously reduced, and an exchange membrane does not need to be used for separating a cavity; a catalyst does not need to be loaded on an electrode, and the cost and technical difficulty of synthesizing and loading the catalyst are avoided; the price is low and operation is easy; the problems of inactivation and shedding of the catalyst do not need to be considered, and the long-term stability is good.

A system includes a wire-holding fixture configured to be received in an EP station. The wire-holding fixture comprises terminals, and each terminal is electrically coupled to a respective working wire of a plurality of working wires. The working wires extend away from the wire-holding fixture. A set of EP stations is included, and each EP station is configured to receive the wire-holding fixture. A container is configured to hold an electropolymerization solution and positioned beneath the EP station such that the working wires is immersible. A board comprising a plurality of electrical contacts is included, and each electrical contact is configured to electrically engage a corresponding terminal. A controller is configured to apply a voltage to the working wires through the respective terminals and electrical contacts to initiate electropolymerization of the material from the electropolymerization solution to form a polymer layer on each working wire.

The application discloses a preparation method of a high-density and high-stability conductive polymer film based on electrochemical polymerization, and comprises the following steps: using an oxidant solution and a BFDO monomer solution to pretreat a formed foil to obtain a working electrode, then immersing the working electrode and a reference electrode into an electrolyte to perform electrochemical oxidation polymerization, and obtaining the high-density and high-stability conductive polymer film based on electrochemical polymerization. The pretreated formed foil containing N-type conductive polymer PBFDO is prepared by using a chemical in-situ polymerization method on the formed foil, and when the pretreated formed foil is applied in the field of capacitors, the conductivity and electron transport capacity of the capacitor can be improved, and the stability problem caused by the coupling of positive and negative charges in the traditional capacitor is greatly improved.

The invention belongs to the technical field of carbon fiber surface treatment, and particularly relates to a cross-linked polymer modified carbon fiber, a preparation method and a composite material. Aiming at the problem of insufficient interface bonding force between the existing polyarylsulfone / ketone thermoplastic sizing agent and the carbon fiber, the core of the invention is to apply a polyarylsulfone / ketone derivative of which a main chain or a side chain is provided with an electrochemically crosslinkable active group to the technical field of carbon fiber surface treatment. And constructing a covalent bond combined three-dimensional network structure coating on the surface of the carbon fiber in situ. According to the method, firm anchoring of the coating and the carbon fibers is achieved, and the interface load transmission efficiency and the interlayer shear strength of the carbon fiber / polyether-ether-ketone composite material can be remarkably improved. The method is mild in process condition, easy in parameter control and convenient in post-treatment, meets green manufacturing requirements, and has remarkable large-scale production advantages.

The invention discloses an electro-Fenton cathode and a preparation method and application thereof. The electro-Fenton cathode comprises a substrate electrode and a ligand-iron oxide interface loaded on the surface of the substrate electrode. According to the method, a ligand-iron oxide interface is constructed by a method of simply adding a low-dose complex, so that the problem that Fe circulation is blocked in a Fenton reaction under a neutral / alkaline condition is solved, and high-added-value oxidation of glycerol is simply and conveniently realized through effective electro-Fenton production of OH and keeping of medium concentration of strong oxidation free radicals; the two bottlenecks of'uncontrollable free radicals' and'easy inactivation of the Fe catalyst 'in the electro-Fenton technology are broken through, and accurate regulation and control of a reaction path are realized through coordination engineering.

The invention discloses a method for coating a Ca-Cur submicron modified material-doped PLA layer on the surface of an Ag-DCPD film layer, and relates to the technical field of biological coatings on the surfaces of medical materials. The method comprises the following steps: manufacturing an LPBF-NiTi alloy matrix by adopting a laser powder bed melting additive manufacturing technology, and carrying out pretreatment on the LPBF-NiTi alloy matrix; the pretreated LPBF-NiTi alloy matrix is subjected to electrochemical deposition in an electrolyte solution, and the LPBF-NiTi alloy matrix with the deposited Ag-DCPD film layer is obtained; the preparation method comprises the following steps: dissolving CaCl2 and curcumin in absolute ethyl alcohol, putting the solution into a closed container filled with (NH4) 2CO3, and carrying out constant-temperature reaction to obtain a Ca-Cur submicron modified material; polylactic acid is dissolved in dichloromethane, then the Ca-Cur submicron modified material is dispersed in the dichloromethane, and a leaching solution is obtained; and the LPBF-NiTi alloy matrix on which the Ag-DCPD film layer is deposited is subjected to repeated dipping and pulling in the leaching solution, and the LPBF-NiTi alloy matrix coated with the Ag-DCPD / PLA / Ca-Cur composite film layer is obtained. According to the invention, the corrosion resistance, the biocompatibility and the antibacterial and anti-inflammatory performance of the Ag-DCPD film layer are successfully improved.

The invention belongs to the technical field of photo-thermal evaporation materials, and discloses a composite photo-thermal material Fe / PANI / GF and a preparation method and application thereof. The preparation method of the composite photo-thermal material Fe / PANI / GF comprises the following steps: taking graphite felt (GF), and activating at high temperature to obtain activated graphite felt; uniformly depositing polyaniline on the surface of the activated graphite felt by adopting a constant current method or a cyclic voltammetry to obtain acid-doped polyaniline (PANIES / GF); and dipping the acid-doped polyaniline in a ferric salt solution or a ferrous salt solution, and dispersing and loading Fe on the PANI nano-particle layer through Fe-N coordination to obtain the composite photo-thermal material Fe / PANI / GF. The method shows wide application prospects in the fields of seawater desalination, high-salinity wastewater treatment, heat-assisted power generation, photo-thermal driven sterilization, soil remediation and the like, and an innovative scheme is provided for solving the problems that a traditional photo-thermal material is low in efficiency, poor in stability, high in cost and the like.

To provide a biocompatible article by grafting an organic coated film onto a conductive or semi-conductive surface.SOLUTION: There is provided a biocompatible article containing an organic coated film acceptable for ionic transportation with a conductive or semi-conductive surface or a part of the surface, electrically grafted to the surface or the part thereof, and electrically grafted to the surface or the part thereof by electric reduction of a solution containing at least one kind of diazonium salt, and a chain polymerizable functional group, and at least one kind of macro article which is a precursor material of the organic coated film.SELECTED DRAWING: Figure 1

The invention discloses a preparation method of a bipolar plate composite coating based on a high-entropy alloy and a conductive polymer, which comprises the following steps: firstly, electro-depositing a layer of high-entropy alloy coating on the surface of a pretreated bipolar plate, and then continuously carrying out electro-polymerization to prepare a polymer coating, thereby forming the composite coating. Through the mode, according to the preparation method of the bipolar plate composite coating based on the high-entropy alloy and the conductive polymer, the comprehensive performance such as corrosion resistance and conductivity of a bipolar plate is effectively improved, the performance requirement for a metal bipolar plate is met, and the preparation method has a wide application prospect in the field of corrosion protection.

The present invention relates to a preparation device for tantalum nitride coated steel material, which comprises a reaction chamber, an induction heating system, a liquid collecting tank and a gas pumping and injecting system; the reaction chamber includes a reaction tank, a cover plate, a first cap and a second cap, and the reaction tank is made of an insulating material; the cover plate covers the reaction tank and is hermetically connected, and a large round hole is provided on the cover plate; the first cap and the second cap are not used simultaneously, and both the first cap and the second cap can be hermetically connected to the large round hole; an anode connector and a tantalum electrode are provided on the first cap, the anode connector is connected to the tantalum electrode, and the tantalum electrode can extend into the reaction tank; a cathode connector communicating with the inside of the reaction tank is provided on the cover plate or the reaction tank; a trachea is provided on the second cap, and the trachea communicates with the liquid collecting tank through a condenser tube or communicates with the gas pumping and injecting system through a pipeline; the induction heating system is arranged around the outer periphery of the reaction tank. The device of the present invention has low equipment and raw material costs, is simple to operate, and the tantalum nitride film on the surface of the steel material is uniform, complete and of good quality.

The invention relates to a multi-dimensional regulation metal organic framework composite electrode and a preparation method and application thereof, and the preparation method comprises the following steps: (1) placing a substrate in an electroplating solution, and carrying out pulse electrochemical deposition on the substrate to obtain a metal organic framework composite precursor; (2) putting the metal organic framework composite precursor obtained in the step (1) into conductive filler dispersion liquid, and performing ultrasonic treatment to obtain a metal organic framework composite precursor loaded with conductive filler; and (3) carrying out heat treatment on the metal organic framework composite precursor loaded with the conductive filler obtained in the step (2) to obtain the multi-dimensional regulation metal organic framework composite electrode, the on-off time ratio Ton / Toff of the pulse electrochemical deposition in the step (1) is (1-3): 1. The structure of the composite electrode is regulated and controlled through a pulse electrochemical deposition process, the composite electrode with excellent conductivity, high electrocatalytic activity and high stability is obtained, and the requirements of the fields of electrocatalysis, energy storage and the like are met.

The invention discloses a method for preparing a hydrogen peroxide-assisted cathode electrodeposition metal organic framework film, and relates to the field of electrochemical synthesis technology. The main points of its technical solution are: specifically comprising the following steps: S1, preparing a cathode electrodeposition solution, dissolving 5 5000mM (millimoles per liter) of a metal salt, 5 5000mM of an organic ligand molecule, and 0.1 5000mM of hydrogen peroxide in an aprotic solvent to obtain a cathode electrodeposition solution; S2, using a method in which a reduction potential is applied to a conductive substrate, cathode electrodeposition is performed on the obtained cathode electrodeposition solution to obtain a metal organic framework film. The method of the present invention utilizes hydrogen peroxide electrochemistry to induce the dehydrogenation of organic ligand molecules at a relatively low potential, thereby achieving the purpose of generating a high-purity MOF film. The preparation method is simple, efficient, low-cost, and has a replaceable working electrode, and can be applied to the preparation of a variety of MOF films containing different metal nodes.

The present invention discloses a method for anti-hydrogen enhancement protection between a transparent energy storage battery current collector and an electrode material, which includes first coating an electrode material on a conductive transparent current collector and sintering it at a high temperature to form an electrode material thin film; secondly, preparing an electrolyte solution required for electro-depositing a polymer anti-hydrogen protection layer; then putting the electrolyte solution into a glass electrolytic cell, using the electrode material thin film on the transparent current collector as the working electrode, a platinum sheet as the counter electrode, and a saturated calomel as the reference electrode, scanning 60-80 cycles at a voltage of 0 to +1.5V with a scanning rate of 100mv / s. After the scanning is completed, the working electrode is rinsed with ethanol and cured at 150 degrees Celsius in the air for 30 minutes to obtain a "protection layer + conductive transparent current collector / electrode material" structure. The present invention prepares an electro-polymerized polymer anti-hydrogen protection layer between the conductive transparent current collector and the electrode material through an electrochemical method, constructs a battery with the transparent current collector as the electrode, can conduct a light transmittance experiment on this battery, and expands the application of the transparent current collector.

The invention discloses a Zr-doped nickel-based electrocatalyst based on a 4, 4 '-dipyridyl chelating ligand and a preparation method and application thereof.The Zr-doped nickel-based electrocatalyst is characterized in that Ni < 2 + > serves as a central metal ion, 4, 4'-dipyridyl serves as the chelating ligand, and a stable coordination structure is constructed; zr is introduced as a doping element, and the electron density and the coordination environment of the catalyst are regulated and controlled by adjusting the doping proportion of Zr; and carbon fiber paper is used as a load electrode. A supported catalyst is prepared by using a constant-current electrodeposition method under a three-electrode system, and the catalyst is directly deposited on the surface of carbon fiber paper to form a self-supporting structure. The preparation method is simple in process, can be amplified on a large scale, and does not need a high-temperature roasting or complex solvent heat treatment step. The obtained catalyst is used for preparing adipic acid by electrocatalytic oxidation of cyclohexanol under an alkaline condition, and shows excellent catalytic activity and selectivity. The invention provides a green, efficient and low-cost adipic acid electrocatalytic synthesized novel electrocatalytic material, and the novel electrocatalytic material has a good industrial application prospect.

A method for producing a stator includes: a coil preparation step of preparing a coil in which an insulating coating is formed on a conductor; a stator core preparation step of preparing a stator core around which the coil is wound; an insulating coating peeling step of peeling off the insulating coating at a portion of the coil to be welded; a carbonization step of carbonizing a surface of an end portion of the insulating coating on a side facing conductor exposed by the peeling; a coil arrangement step of arranging the coil on the stator core; a welding step of welding the conductors exposed by the peeling in a plurality of the coils; and an electrodeposition coating step of performing electrodeposition coating on the exposed conductor and the carbonized surface of the insulating coating in each of the plurality of coils using a resin material.

A joint structure increases fastening force between a first member and a second member while preventing peeling of an anti-rust coating film of the first member. The joint structure includes the first member in which the anti-rust coating film is formed by electrodeposition on a surface of a metallic base material; the second member that contacts the first member; and fastening members that fasten the first and second members together. Plural convex portions, each having a height less than a thickness of the electrodeposition coating film, are disposed in at least a part of a surface of the second member that contacts the first member. The first member and the second member are fastened by the fastening members such that the electrodeposition coating film of the first member and the convex portions mesh with each other without the base material of the first member contacting the convex portions.

Briefly, a sensor for a continuous biological monitor is provided for measuring the level of a target analyte for a patient. The sensor has a working wire and a reference wire, where the working wire has an analyte limiting layer that passes more than 1 in 1000 analyte molecules from the patient to an enzyme layer. The enzyme layer has an enzyme entrapped in a polyurethane cross-linked with acrylic polyol. As free electrons are generated, a conductor transfers the electrons to the biological monitor. In some cases, the sensor may be constructed without the use of any expensive platinum.

The invention relates to a high-thermal-conductivity nitride whisker reinforced nitride ceramic-based composite material and a preparation method thereof, and the preparation method comprises the following steps: dissolving a carbon precursor and an aluminum salt in a solvent containing a supporting electrolyte to obtain a carbon precursor / aluminum salt electrolyte; placing a conductive substrate in a carbon precursor / aluminum salt electrolyte, performing electrochemical deposition to obtain an aluminum / carbon precursor substrate, cutting the aluminum / carbon precursor substrate into a frame-type aluminum / carbon precursor growth substrate, transferring the frame-type aluminum / carbon precursor growth substrate into a graphitization furnace, and performing gradient heating carbon thermal reduction nitridation reaction to obtain an aluminum nitride whisker / porous carbon composite frame after the reaction; mixing the nitride particle powder, a sintering aid and a dispersing agent to obtain mixed slurry; and filling the aluminum nitride whisker / porous carbon composite frame with the mixed slurry, carrying out dry-pressing molding to obtain a composite board, and carrying out hot-pressing calcination to obtain the nitride nanofiber toughened nitride ceramic substrate. Accurate regulation and control of the growth process of the aluminum nitride whiskers are achieved, and the problems that the length-diameter ratio of aluminum nitride nanofibers is low, and distribution is uneven are effectively solved.

The invention provides a covalent organic framework / conducting film composite material as well as a preparation method and application thereof, and belongs to the technical field of covalent organic framework materials. The conductive film is used as the substrate of the diaphragm, and the conductivity of the diaphragm is improved by utilizing the high conductivity of the conductive film, so that the electrochemical performance of the lithium-sulfur battery is improved; in addition, the conductive film has adsorption and catalysis effects on polysulfide, and shuttling of the polysulfide can be inhibited; cOFs are subjected to in-situ growth on the surface of the conductive film through two times of electrochemical deposition, polysulfide is limited in a pore channel by using a pore channel structure of the COFs, and shuttling of the polysulfide is inhibited; by adjusting the monomer concentration of two times of electrochemical deposition, the COFs structure is regular, and the electrochemical performance of the lithium-sulfur battery is further improved.

The application discloses a flexible transparent aqueous zinc ion battery polyaniline / vanadium oxide composite positive electrode sheet and a preparation method thereof, and belongs to the technical field of aqueous zinc ion batteries. The preparation method comprises the following steps: using vanadyl sulfate aqueous solution as an electroplating solution, using a gold grid / PET as a working electrode, and using a platinum sheet as a counter electrode to construct a two-electrode structure; a vanadium oxide layer is deposited on the surface of the gold grid / PET by adopting a constant-voltage electrochemical deposition method, and a vanadium oxide / gold grid / PET is prepared; sulfuric acid and polyaniline are added into deionized water to prepare an electroplating solution, the vanadium oxide / gold grid / PET is used as the working electrode, the platinum electrode is used as the counter electrode, and a saturated calomel electrode is used as a reference electrode to construct a three-electrode structure; a polyaniline layer is deposited on the surface of the vanadium oxide / gold grid / PET by adopting a constant-voltage electrochemical deposition method, and the composite positive electrode sheet is obtained.

A digital nail system includes a client device, a color programming device, and an artificial nail assembly. The client device may include a nail color app for providing color options for programming the artificial nail assembly, with each color option having at least one corresponding color file associated therewith that includes a voltage list. The color programming device is configured to communicate with the client device to receive at least one corresponding color file corresponding to at least one user-selected color option, and is configured to generate programming voltages in the voltage list for the at least one corresponding color file.

The present invention provides a method of preparing an electrode for a lithium secondary battery which includes forming a first electrolyte layer by immersing an electrode current collector in a composition for forming the first electrolyte layer and applying a current, and forming a second electrolyte layer by immersing the electrode current collector having the first electrolyte layer formed thereon in a composition for forming the second electrolyte layer and applying a current, wherein one of the composition for forming the first electrolyte layer and the composition for forming the second electrolyte layer is a composition for forming an organic electrolyte layer, and another one is a composition for forming an inorganic electrolyte layer, and the composition for forming an inorganic electrolyte layer includes a compound represented by Formula 1.

The application provides a copper electrode based on a UiO-66-NH2 metal organic framework film, and a preparation method and application thereof, and relates to the fields of electrocatalysis and new energy materials. The electrode is composed of a rough metal copper substrate (rCu) and a continuous and uniform dense film of UiO-66-NH2 on the surface, the rCu is prepared by chemical oxidation of a commercial copper foil to generate CuO nanosheets and then electrochemical reduction, and the film is grown by cathodic electrodeposition for 20 minutes. The electrode is applied to the electrocatalytic reduction of nitrate to synthesize ammonia in a neutral medium, the enrichment of hydrated potassium ions in the film, the reconstruction of the interface water to build a rich-proton limited microenvironment, and the reduction of the activation energy of the rate-determining step. In a continuous flow system, the electrode can be stably operated at a current density of 800 mA cm ‑2 for more than 40 hours, and high-purity ammonium chloride can be recovered, so that the problems of insufficient proton supply, low selectivity and low activity in the prior art are solved.

A system includes a wire-holding fixture configured to be received in an EP station. The wire-holding fixture comprises terminals, and each terminal is electrically coupled to a respective working wire of a plurality of working wires. The working wires extend away from the wire-holding fixture. A set of EP stations is included, and each EP station is configured to receive the wire-holding fixture. A container is configured to hold an electropolymerization solution and positioned beneath the EP station such that the working wires is immersible. A board comprising a plurality of electrical contacts is included, and each electrical contact is configured to electrically engage a corresponding terminal. A controller is configured to apply a voltage to the working wires through the respective terminals and electrical contacts to initiate electropolymerization of the material from the electropolymerization solution to form a polymer layer on each working wire.

The present invention provides a method for preparing a graphene conductive polymer coating on the surface of a bipolar plate by electrodeposition, comprising the following steps: Step 1, chemically modify graphene oxide to graft anionic functional groups to prepare a modified graphene oxide aqueous dispersion; Step 2, mix the modified graphene oxide aqueous dispersion and the conductive polymer monomer aqueous dispersion in a certain proportion to obtain an electrolyte; Step 3, pretreat the metal-based bipolar plate by immersing the metal-based bipolar plate in a sulfuric acid solution to remove the passivation film on its surface; Step 4, use the metal-based bipolar plate as the anode and a platinum sheet as the cathode, and perform electrodeposition on the metal-based bipolar plate with a DC power supply; Step 5, dry the deposited wet film to obtain a graphene conductive polymer composite coating. The present invention utilizes the doping effect of the functional groups on the surface of anionic modified graphene on the conductive polymer, promotes the π-electron delocalization of the conductive polymer, and improves the conductivity of the composite coating.

This invention relates to the field of steel-magnesium composite workpiece technology, and discloses a nano-injection molded steel-magnesium composite workpiece and its preparation method; including the following operation steps: Step 1: Degrease and wash the steel-magnesium composite workpiece with water, immerse it in an alkaline solution, wash it with water, perform pH gradient washing, immerse it in an acidic solution, wash it with water, and sonicate it in a chromate-nitric acid solution for 10~20s to obtain steel-magnesium composite workpiece A; Step 2: (1) Electrolyze the steel-magnesium composite workpiece A in an electrolyte, take it out, wash it with water, and dry it to obtain steel-magnesium composite workpiece B; (2) Wash the steel-magnesium composite workpiece B in hot water, activate it in a silane coupling agent solution, and perform nano-injection molding to obtain a nano-injection molded steel-magnesium composite workpiece. In this scheme, the potential difference on the surface of the steel-magnesium composite workpiece is improved and the surface roughness difference is reduced by the electrolyte to improve the interfacial bonding stability.