874 results about "Metallic substrate" patented technology

The invention relates to environment-friendly hydrophobic ink and a preparation method thereof, and belongs to the technical field of water-based ink. A copolymerization modifier capable of being combined in a water-based polyacrylate emulsion in an initiation polymerization mode in the stage of preparing the modified water-based polyacrylate emulsion is prepared, and an o-hydroxy aromatic ketone structure in the copolymerization modifier can endow water-based ink with lasting ultraviolet absorption performance; the trifluoromethyl structure can reduce the surface energy of the water-based ink, and the benzimidazole ring structure can form stable coordinate bonds with metal ions, so that the bonding performance of the water-based ink and a metal substrate is enhanced; when the copolymerization modifier is used for modifying the water-based polyacrylate emulsion, the long-term performance, the hydrophobic and oil-resistant performance and the adhesion performance on the surface of a metal base material of the finished water-based ink can be effectively improved.

The invention discloses a coating, a preparation method and application, and relates to the technical field of anticorrosive coatings. A dry film of the coating comprises 0.1 wt%-6wt% of a lamellar filler; the lamellar filler is prepared by loading magnetic nanoparticles on the surfaces of two-dimensional nanoparticles and coating a layer of high-molecular polymer. After the coating forms a film, a specific magnetic control orientation curing method is matched, so that high dispersion stability and planar orientation arrangement of the two-dimensional nano filler in a resin matrix are realized, and corrosion of water and oxygen to a base material can be effectively blocked. When the thickness of the coating dry film is only 1-2 microns, the coating dry film still has no obvious corrosion phenomenon after being subjected to a neutral salt spray test for 2000 hours. The metal base material with the thin coating thickness has heat conductivity, corrosion resistance and weather resistance, the preparation process is simple, the cost is low, and the metal base material has extremely high market application value.

The invention belongs to the technical field of wear-resistant coatings, and particularly relates to a wear-resistant coating for a metal plate of a compressed garbage truck and a preparation method of the wear-resistant coating. The invention aims to solve the problem that an existing coating for the metal plate of the garbage truck is difficult to keep good protection performance under corrosion and abrasion. The preparation method comprises the following steps: carrying out pre-reaction grafting modification on epoxy resin and amine-terminated polyether to obtain an epoxy prepolymer; alpha-aluminum oxide and barium sulfate are mixed, dispersed, ground and subjected to surface activation, and a basic filler is obtained; adding a mica filler into the basic filler, and shearing and mixing to obtain a composite filler; mixing the epoxy prepolymer with a phosphate auxiliary agent to obtain a primer; dispersing and mixing the epoxy prepolymer and the composite filler to obtain a functional coating; after a metal base material is subjected to sand blasting treatment, primer is pre-sprayed on the surface of the metal base material, and then functional paint is covered and sprayed to obtain the wear-resistant coating. The wear-resistant coating prepared by the invention can keep good protection performance under corrosion and wear, and has high application value.

The invention discloses a coating for improving the paint adhesion capability of a metal part of a distribution box, and the coating is prepared by the following steps: depositing a first oxide layer on the metal surface, the first oxide layer comprising Zn element and Ce element; a second oxide layer is deposited on the surface of the first oxide layer, the second oxide layer comprises a Zn element and a Ce element, and the molar ratios of the Zn element and the Ce element of the first oxide layer and the second oxide layer are different; a third oxide layer is deposited on the surface of the second oxide layer, and the third oxide layer comprises a Zn element and a Dy element; and a fourth oxide layer is deposited on the surface of the third oxide layer, the fourth oxide layer comprises a Zn element and a Dy element, and the molar ratios of the Zn element and the Dy element of the third oxide layer and the fourth oxide layer are different. The coating provided by the invention can improve the adhesive ability of the paint to a metal substrate.

The invention discloses a lignin-based epoxy anticorrosive paint and a preparation method thereof. The anticorrosive paint is prepared by mixing a lignin-based epoxy anticorrosive paint component, a lignin-based phenolic amine curing agent and a diluent. According to the lignin-based epoxy anticorrosive paint disclosed by the invention, on one hand, a lignin epoxy resin acetylation modification method based on lipase is introduced, and the content of hydrophilic groups is reduced, so that formation of a compact lignin cross-linked network structure is promoted, and the barrier ability, heat resistance and aging resistance of an anticorrosive coating on a chemical medium are improved on the resin level; on the other hand, lignin and furfural are respectively used for partially replacing phenol and paraformaldehyde to prepare a lignin-based phenolic aldehyde amine curing agent with high chemical inertness, so that the protection effect of a coating in an extreme corrosion environment and the adhesive force to a metal base material are improved on the curing agent level. The lignin-based epoxy anticorrosive paint prepared by the invention has good corrosion resistance, aging resistance, thixotropy and adhesive force.

The invention discloses a nickel-cobalt metal-based wear-resistant and corrosion-resistant coating and a preparation method thereof, and relates to the technical field of surface coatings, and the technical key points of the nickel-cobalt metal-based wear-resistant and corrosion-resistant coating comprise the following steps: S1, carrying out oil removal and sand blasting roughening treatment on the surface of a metal substrate, then cleaning with absolute ethyl alcohol, and drying; s2, nickel-cobalt metal-based alloy powder is prepared, wherein the nickel-cobalt metal-based alloy powder is prepared from, by weight, 55-65 parts of nickel, 20-30 parts of cobalt, 15-18 parts of chromium, 4-6 parts of molybdenum, 3-5 parts of tungsten, 1-3 parts of iron, 0.8-1.5 parts of silicon, 0.5-1.2 parts of carbon and 0.5-1.0 part of boron; the technical effect is that a regular non-smooth micro-pit array is manufactured on the surface of a sprayed layer through interlayer laser micro-texturing treatment. And the molten particles of the next layer of spraying material are embedded into the micro pits to form a strong mechanical interlocking effect, so that the interlayer bonding strength and the anti-shearing capability are greatly improved, and interlayer dislocation and stripping are effectively prevented.

The present application provides a heat exchanger and a manufacturing method of a heat exchanger. The heat exchanger includes a metal substrate, the metal substrate has a fluid channel for circulating a heat exchange medium; and the heat exchanger further includes a coating, the coating includes resin, silica and titanium dioxide, and the coating is arranged to cover at least part of a surface of the metal substrate. Silica particles and titanium dioxide particles are conducive to the formation of a complex micro-nano structure, and leveling and stability of hydrophilic resin contribute to long-term maintenance of the micro-nano structure. The coating of the heat exchanger according to the present application has excellent hydrophilic durability.

The invention provides a single-component modified silane adhesive as well as a preparation method and application thereof. The adhesive is prepared by mixing the following components: silane modified polyether resin, silane modified polymer resin, a plasticizer, a composite light stabilizer, a filler, a rheological additive, a water removal agent, a coupling agent and a catalyst, the silane modified polyether resin is silane-terminated resin prepared by a hydrosilylation method; the silane-modified polymer resin is a silane-terminated polymer resin containing a urethane bond. The adhesive is excellent in comprehensive performance, the tensile strength of a body is larger than 3 MPa, the elongation at break is larger than 450%, the adhesive is high in adhesion universality to metal base materials, PET films, ceramics, glass, wood floors, PVC, PC, ABS, wood-plastic composite materials and paint faces, the base materials do not need to be specially treated, the damage form is cohesive failure, and the adhesive has good adhesion strength, tear resistance and excellent temperature resistance and is suitable for being applied to the field of wood products. After aging at 120 DEG C for one week, the tensile strength of the body is greater than 3 MPa, the elongation at break is greater than 430%, and the surface layer can be coated after curing.

The invention relates to the technical field of photoresists, in particular to a positive chemical amplification type photoresist as well as a preparation method, a use method and application thereof, and aims to solve the problems that the photoresist is easily subjected to bottom residue on a metal substrate after development, and the etching yield is poor after metal electroplating in a subsequent process. The key points of the technical scheme are as follows: the mixed resin comprises first resin and second resin; an initiator, wherein the initiator comprises a photoacid production compound; the quenching agent is an alkaline agent or an acid-induced alkali production agent; the auxiliary agent comprises a protective agent, and the protective agent is a group modified azole compound; the solvent is used for dissolving the substances to prepare the positive chemical amplification type photoresist, and by optimizing the composition and the process of the positive chemical amplification type photoresist, on the premise of ensuring the adaptability and the stability of the process, the problems of the side wall angle of a product after exposure and development and the residual of the photoresist on the bottom of a metal substrate after development are effectively improved.

The invention belongs to the technical field of vibration isolation, and particularly relates to a quasi-zero stiffness metamaterial sandwich structure, a vibration isolation device and a manufacturing method. The quasi-zero stiffness metamaterial sandwich structure is formed by periodically arranging unit cells in the horizontal direction, and each unit cell comprises an upper panel, a lower panel, a QZS resonator core body and a vertical supporting column; the QZS resonator core comprises a central mass block, QZS resonator units are arranged on the upper portion and the lower portion of the central mass block in a mirroring mode, each QZS resonator unit is composed of two quasi-zero-stiffness unit cells which are arranged in a crossed mode, and each quasi-zero-stiffness unit cell is composed of a negative-stiffness component comprising a horizontal curved beam and a positive-stiffness component comprising an oblique straight beam. According to the sandwich structure, the quasi-zero-stiffness resonator of a novel structure serves as a core body, wider application in the ultra-low frequency vibration reduction field can be achieved, the band gap is adjustable, and the problems that a traditional metal base material structure is high in band gap frequency and limited in application field can be solved.

The invention discloses a water-based paint composition of a fingerprint-resistant color coated steel plate and a preparation method of the water-based paint composition, and relates to the technical field of fingerprint-resistant coating materials and functional water-based paint compositions.The water-based paint composition comprises a functional paint composition system composed of water-based film-forming resin and a poor-polarity block type surface conditioning agent; the water-based coating composition is applied to the surface of a metal base material in a roller coating, spraying or blade coating mode, and the oriented migration behavior of an oleophobic chain segment is excited through heat treatment; and the coated steel plate is dried and cured, preferably, a hot air drying or hot-pressing crosslinking mode is adopted, and an oleophobic film layer is prepared on the surface. The method provided by the invention ensures that the system has stable dispersibility and migration responsiveness, realizes spontaneous construction of an oleophobic structure, improves the interface specificity of a film layer, and improves the hydrophobicity and fingerprint pollution resistance of the surface of the steel plate, so that the colored coating has both decoration and functionality, and is suitable for being used in the field of steel plates. The double requirements on appearance stability and anti-pollution performance in practical application are met.

The present invention relates to a precursor for the production of an alloy used as a catalyst. The precursor comprises a metallic substrate, a layered structure comprising binders, metallic particles, and at least one metal oxide, metal phosphide, and / or metal sulfide, wherein the layered structure is arranged on the metallic substrate.

The invention discloses a water-based metal anticorrosive paint and a preparation method thereof, and belongs to the technical field of water-based paints. The hyperbranched polyphosphate and the water-based alkyd resin can be subjected to a cross-linking reaction to form a compact network structure, the hyperbranched polyphosphate and a metal interface also have good bonding performance, the adhesiveness of a coating is improved, the water-based alkyd resin has good flexibility, the integrity of the coating is kept, and the water-based alkyd resin has good adhesion to the metal interface. Corrosion media are prevented from permeating, and the purpose of protecting metal for a long time is achieved; by adding the glass flakes, a complex and zigzag path can be formed in the coating, corrosion media are further prevented from permeating into metal, and therefore the corrosion resistance of the coating is improved; the organosilane-modified nano cerium oxide particles can be directionally distributed in the coating, oxygen diffusion is blocked, a rare earth conversion film can be formed on the surface of a metal base material, and a stable passivation layer is generated through hydrolysis, so that electrochemical corrosion is inhibited.

The invention discloses an FMM preparation method and material processing equipment, and relates to the field of semiconductor processing, and the method comprises the steps: carrying out the pretreatment of a strip-shaped metal substrate, removing the surface impurities of the strip-shaped metal substrate, and improving the flatness of the strip-shaped metal substrate; the two sides of the metal base material are thinned, and the thinning amount of the first surface of the metal base material is smaller than that of the second surface of the metal base material; and forming a plurality of evaporation holes penetrating through the first surface and the second surface on the metal substrate, wherein the evaporation holes are gradually expanded from the first surface to the second surface. According to the preparation method of the FMM, the internal stress in the material can be balanced in the metal base material thinning process, and the FMM is not prone to deformation in the preparation process or the evaporation process.

A method for laser treating a substrate of a piston seal ring (PSR) (20) for a gas turbine engine includes: deforming the substrate to place a portion (310) of a first surface (30) of the substrate in tensile stress; and while holding the substrate deformed, laser treating the portion (310). After the laser treating but before release of the deformation, the first surface (30) may remain in tensile stress. Release of the deformation then at least partially cancels the tensile stress.

The invention relates to the technical field of high polymer materials and protective coatings, and discloses a single-layer anti-ultraviolet heavy-duty powder coating as well as a preparation method and application thereof. The preparation method of the single-layer anti-ultraviolet heavy anti-corrosion powder coating comprises the following steps: adding carboxyl polyester resin, triglycidyl isocyanurate, modified nano silicon dioxide, modified chitosan, 2-(2H-benzotriazole-2-yl)-4, 6-di-tert-pentylphenol, bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate, flaky aluminum powder, zinc phosphate, BYK-3920, 2-hydroxy-1, 2, 4-triazole-2-yl)-1, 3, 4-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5- The preparation method comprises the following steps: stirring and mixing 2, 2-diphenylethanone and gamma-aminopropyltriethoxysilane at room temperature at 300-350rpm for 10-15min to obtain a mixture, extruding the mixture through a double-screw extruder at the extrusion temperature of 110-120 DEG C and the screw rotation speed of 450-500rpm, and grinding to obtain the single-layer anti-ultraviolet heavy-duty anticorrosive powder coating. The single-layer anti-ultraviolet heavy anti-corrosion powder coating can be applied to metal base material protection. The coating prepared by the invention has good ultraviolet resistance and corrosion resistance.

The utility model discloses coating equipment and a battery production line, and relates to the technical field of battery production. The coating mechanism of the coating equipment comprises a coating die head and at least one roller piece, wherein the roller piece comprises a first back roller, a middle roller and a second back roller; the coating die head comprises a first die head body and a second die head body, the discharging end of the first die head body and the discharging end of the second die head body face the first back roller and the second back roller respectively, at least one of the first back roller, the middle roller and the second back roller is provided with a heating structure, and the coating oven is arranged on the downstream of the heating structure. Fluid channels of the heating structure and the coating drying oven are communicated, so that the total number of heating equipment is reduced; the first back roller, the middle roller and the second back roller are close to the coating oven in the belt conveying direction of the metal base material, so that the initial temperature of the metal base material before entering the coating oven can be increased, the temperature change range is reduced, the heating uniformity degree of a film coating area and a blank area is improved, the risks of wrinkling of the film coating area and cracking of the blank area are reduced, and the service life of the metal base material is prolonged. And the quality of the pole piece is improved.

The invention discloses an automotive interior metal part spraying process based on a high-adhesion water-based paint, which comprises the following steps: firstly, carrying out alkali washing and acid washing treatment on a metal part, so that the metal surface is clean and micro roughness is formed; then carrying out chemical conversion treatment by adopting a water-based conversion solution containing amino silane and epoxy silane to form a compact and uniform conversion film on the metal surface; then water-based prime coat is sprayed on the surface of the conversion film, the thickness of a dry film is controlled to be 3-8 microns, and good substrate binding force is provided after heating; the preparation method comprises the following steps: firstly, spraying a water-based finishing coat taking hydroxy acrylic resin as a main body, adding a blocked isocyanate cross-linking agent, uniformly coating through an electrostatic spraying process, and finally curing under a sectional heating condition to obtain a coating with excellent durability; according to the present invention, the adhesion between the water-based paint and the metal base material is effectively improved, the durability of the paint film in the damp and hot salt mist environment is improved, the use of the organic solvent is reduced, and the advantages of environmental protection, low VOC emission and suitableness for industrial large-scale production are provided.

The invention provides a coating composition, a metal protective coating and a preparation method of the metal protective coating. The coating composition is prepared from the following components in percentage by weight: 15 to 50 weight percent of silica sol, 3 to 25 weight percent of glass powder, 10 to 25 weight percent of silane coupling agent, 0.5 to 2 weight percent of organic acid, 2.5 to 20 weight percent of filler and the balance of water, wherein the melting point of the glass powder is 400-600 DEG C. The glass powder has the specific melting point, can soften and flow in the coating curing process, is fused with the silica sol and fills coating gaps, a more compact network structure is formed, the sealing performance and permeation resistance of a coating are improved, and corrosion of a corrosive medium to metal is blocked. The silane coupling agent is introduced, so that the interface bonding force between the coating and the metal substrate can be enhanced, and the adhesive force of the coating to the metal substrate is improved. The coating composition takes water as a solvent, so that the emission of organic volatile matters and the harm to the health of operators are reduced.

Methods of using high-purity alkynes substantially free of residual alkyl halides, water and / or carboxylic acids and their use (e.g., in formulations) for enhanced passivation of metallic substrates.

The invention relates to an optical element (1) for reflecting radiation (2) in the VUV wavelength range, comprising: a surface (4a, 4a'), and a dielectric multilayer coating (5) applied to the surface (4a, 4a'). The dielectric multilayer coating (5) is designed for the particularly broadband reflection of radiation (2) in the VUV wavelength range. The surface (4a, 4a') is formed from a preferably metallic base material that has a reflectivity of 60% or less, particularly 50% or less, in the VUV wavelength range. Preferably, the base material for reflecting radiation (3) in the UV / VIS wavelength range has a reflectivity of at least one wavelength (λ). VIS) exhibits a reflectivity of more than 50%, preferably more than 70%, particularly preferably more than 80%, and especially more than 90% in the UV / VIS wavelength range. The invention also relates to an optical arrangement for the VUV wavelength range, which comprises at least one such optical element (1).

The present invention discloses a polyaspartic acid ester-modified epoxy resin, a non-toxic, environmentally friendly, wear-resistant, and anti-corrosion coating for ships containing the resin, as well as a preparation method and application. The structural formula of the polyaspartic acid ester-modified epoxy resin is as follows: The solvent-free, non-toxic, and anti-corrosion and anti-corrosion coating of the present invention uses the polyaspartic acid ester-modified epoxy resin as a film-forming material, can be cured at room temperature, and exhibits excellent adhesion, salt spray resistance, and media resistance. When applied to ship ballast tanks, drinking water tanks, oil and sewage tanks, and other compartments, or other metal substrate surfaces for corrosion protection, it provides excellent long-term anti-corrosion performance.

The invention belongs to the technical field of coatings, and particularly relates to an anti-impact high-flexibility anticorrosive coating as well as a preparation method and application thereof. According to the anti-impact and high-flexibility anticorrosive paint provided by the invention, by introducing the expanded graphite compositely modified by the silane coupling agent and the titanate coupling agent and the phosphorus-titanium-silicon sol, the anti-impact performance and the flexibility of a coating formed by curing the anticorrosive paint are improved, the coating can generate a phosphate passive film with a metal substrate, electrochemical corrosion is inhibited, and the service life of the coating is prolonged. The coating is not easy to fall off, can effectively adsorb UV-A / B waveband ultraviolet rays, is expected to meet the requirements of corrosion resistance and weather resistance in a harsh environment, and can be used as a film-forming substance by compounding a self-emulsified waterborne polyester dispersion and a waterborne epoxy modified hydroxy acrylic dispersion, and inorganic fillers such as boron nitride nanosheets, composite iron-titanium powder, wet-process sericite, silica powder and the like, so that the corrosion resistance and weather resistance of the coating are greatly improved. The performance of the anticorrosive paint is further improved; therefore, the technical problem of lack of high-performance anticorrosive paint in the prior art is solved.

The invention belongs to the field of polymer coatings, and provides an aliphatic polyurethane finish paint with high adhesion resistance and a preparation method thereof. According to the invention, a polyurethane phase and a polyacrylate network are adopted to construct a semi-interpenetrating network structure, cyclic carbonate and hydrolyzable silane end groups are introduced into double-end functionalized polysiloxane, and a silicon-oxygen network surface layer is self-assembled after coating and curing; the high crosslinking density with the gel fraction being greater than or equal to 85%, the wear-resistant and anti-slip performance with the dry friction coefficient being greater than or equal to 0.50 and the abrasion mass loss being less than or equal to 0.030 g / 500 r, the ultra-low surface energy anti-dirt performance with the water contact angle being greater than or equal to 105 degrees and the surface free energy being less than or equal to 22 mN / m and the environment-friendly characteristic that the volatile organic compound content is less than or equal to 50 g / L are achieved; the three technical contradictions of high gel fraction and ultralow surface energy silica surface layer coupling, high hardness wear resistance and high friction coefficient maintenance, and high solid content and low volatility organic compound processing window and nano gradient silica surface layer construction are solved, and the nano gradient silica coating has wide application value in the field of industrial terraces and metal base material coatings.

The invention relates to the technical field of coatings, in particular to a high-gloss water-based two-component finish paint. The high-gloss water-based two-component finish paint comprises a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: 70-90 parts of a polyurethane modified water-based acrylate dispersion, 5-10 parts of a water-based high-hydroxyl acrylic acid dispersion, 0.1-1 part of a flatting agent, 0.1-1 part of a wetting agent, 0.1-1 part of a defoaming agent, 1-10 parts of water-based color paste and 5-15 parts of water; and the component B is 5-15 parts by weight of a water-based isocyanate curing agent. The water-based two-component finishing paint provided by the invention can be used for thick coating, miliaria and dark bubbles are not easy to occur, a paint film is good in leveling property, good in fullness and high in glossiness, and the water-based two-component finishing paint is particularly suitable for coating of a metal substrate.

The invention discloses a preparation process of a high-temperature-resistant metal protective coating, and relates to the technical field of protective coatings. According to the coating, an inorganic material which is stable at high temperature is compounded with an organic polymer to form a matrix with excellent high-temperature resistance, and an anti-corrosion filler is added to improve the corrosion resistance and the wear resistance. Through a specific preparation process, the coating and the metal substrate are tightly combined to form a compact protective barrier. The coating provided by the invention has excellent high-temperature resistance, corrosion resistance and adhesive force, and is suitable for metal structure protection in a high-temperature environment.

The utility model discloses metal base material surface coating binding force detection equipment which comprises a detection table, a detection assembly and an auxiliary assembly are arranged at the upper end of the detection table, a controller is arranged on one side of the detection table, and through cooperation of the detection assembly and the auxiliary assembly, multi-angle and multi-mode detection of the metal base material surface coating binding force can be achieved. The defects that in the prior art, a detection method is single, and the binding force cannot be comprehensively and accurately evaluated are overcome, specifically, a first electric push rod, a first motor, an adjusting gear, an adjusting rack, a micro motor and other parts in the detection assembly can accurately adjust the detection force and the detection position, and the detection accuracy is improved. Therefore, the pressing detection block can detect the coating with proper force and angle, so that the bonding strength between the coating and the metal base material can be measured more accurately.

Provided is a precoated metal plate (1), in which a second exposed part (30B) is disposed directly behind a first exposed part (30A), and a first length (L1) of the first exposed part (30A) from an end surface (15) of a metal substrate (10) to an edge part (21A) of a first coating film part (20A) is equal to or greater than a second length (L2) of a second exposed part (30B) from the end surface (15) of the metal substrate (10) to an edge part (21B) of a second coating film part (20B) disposed directly behind the first exposed part (30A).

The invention relates to the technical field of coatings, and discloses an acid and alkali resistant UV curing coating and a preparation method thereof. The prepared UV curing coating is prepared from the following raw materials in parts by weight: 40 to 60 parts of acrylic resin, 3 to 8 parts of pentaerythritol tetraacrylate, 3 to 7 parts of silicon dioxide, 3 to 5 parts of a photoinitiator, 6 to 12 parts of a composite reinforcing agent, 0.2 to 0.6 part of a flatting agent, 1 to 2 parts of a dispersing agent, 0.5 to 1.5 parts of a de-foaming agent and 15 to 25 parts of water. A coating film obtained after the coating is subjected to ultraviolet curing has excellent acid and alkali resistance, salt spray resistance and adhesive force and can be widely applied to the surface of a metal base material, and the metal base material is protected against corrosion of corrosive media such as acid, alkali and salt.

The invention discloses an electroplating method of a low-porosity nanoscale bright tin layer, which comprises the following steps: placing a clean metal substrate in an activating solution containing a surface modifier, and applying high pulse current for short-time impact to form a transition layer to obtain a target substrate; a target base material is placed in the nano-composite tin plating solution, electroplating is carried out under the cooperation of a continuous ultrasonic field and target waveform pulse current, and a low-porosity nano-scale bright tin layer is formed; the nanometer composite tin plating solution comprises stannous methanesulfonate, methanesulfonic acid, nanometer silicon carbide, nanometer silicon dioxide, a grain refiner, a dispersing agent, cinnamyl aldehyde, a vinyl pyrrolidone copolymer, ascorbic acid, a wetting agent and the balance deionized water. The binding force of a plating layer without a base coat is improved, the plating layer is strengthened, compact and bright, and the process is environmentally friendly.