76results about How to "Improve corrosion protection" patented technology

Chromate-free and metal phosphate free treatments and compositions for applying a conversion or passivation coating for metals, more particularly, steel, zinc coated steel, and aluminum surfaces. The methods of the invention comprise contacting the requisite metal surface with a treatment composition comprising a member or members comprising one or more Group IV B elements, fluoride, and phosphonic acid or phosphonate. Optionally, a silane may be added as a treatment component.

The invention discloses an anti-corrosion high-hardness abrasion-resistant alloy cast ball. The preparation process of the anti-corrosion high-hardness abrasion-resistant alloy cast ball comprises the steps of smelting, detection, casting, thermal treatment and coating spraying. The cast ball comprises alloy elements including C, Mn, Si, Ni, Cr, Mo, V, Re, Ti, B, Nb, Ca, Zr, Mg, Zn, Cu, W, S, P and the balance Fe and inevitable impurities. The alloy cast ball obtained through the preparation process can be used in various environments, good corrosion resistance and abrasion resistance are achieved, the hardness can reach over 70 HRC, the impact toughness can reach 7 J / cm<2>, and the requirements for the alloy cast ball in the practical using process are met.

The present invention is directed to a high protection, trivalent chromium coating composition that is particularly useful as a conversion coating on substrates in need of corrosion protection. The conversion coating composition comprises chromium (III) ions, cobalt (II) ions, nitrate ions, and sulfate ions. The invention further provides methods of applying a conversion coating to a plated article and articles with a conversion coating applied thereto.

The invention provides an environment-friendly, acid-proof and high-temperature-resistant exterior wall coating material and a preparation method thereof. The coating material comprises the following components: organic silicon-modified epoxy resin, bisphenol-A epoxy resin, a thermal insulation filler, nano-silica, an anti-rusting pigment, carboxymethyl cellulose, acetone, nano-calcium carbonate, butyl acetate, a cosolvent, deionized water, dibutyl phthalate, a pH regulator, a dispersing agent, a film forming agent and a thickening agent. The bisphenol-A epoxy resin is matched with the organic silicon-modified epoxy resin, so that the coating material has good lustrousness and static electricity resistance and relatively good mechanical property, ageing resistance and chemical corrosion resistance; by adding the thermal insulation filler and the anti-rusting pigment, the high temperature resistance, the corrosion resistance and the acid resistance of the coating materials are effectively improved; furthermore, the coating material has the superiorities in price and environmental protection, is strong in adhesive force, good in ductility and long in service life and can resist high temperature; and a spray painting manner is replaced with a roller painting manner during the painting, so that the production environment is effectively improved, and the body health of workers is improved.

The invention discloses a manufacturing method for a composite steel pipe through laser manufacturing. The manufacturing method comprises the following steps that S1, material is selected, wherein material selection is not limited by chemical components and the specification of the material; S2, pretreatment is conducted, and specifically, rust on the surface is removed through an electric grinding machine or in a shot blasting derusting mode; S3, after the material is located at a machining position, cleaning is carried out again, and oil stains on the surface are cleared thoroughly; S4, a surface coating is manufactured; S5, the surface of the coating is treated and cleaned; S6, the coating is inspected; and S7, defects are repaired. According to the manufacturing method, the pretreatment step is added before the surface coating manufacturing step so that the oil stains on the surface can be cleared thoroughly, then the rust on the surface is ground through the electric grinding machine or a shot blasting derusting method and other methods, then a coating material is cladded on the surface through a laser cladding technology, and therefore the composite coating is achieved, the capabilities such as corrosion resistance, wear resistance, high temperature resistance and the like, of an original steel pipe in a certain aspect are improved through the composite coating.

The invention discloses a halloysite nanotube-added abrasion-resistant type strippable macromolecular antirust film. The halloysite nanotube-added abrasion-resistant type strippable macromolecular antirust film is prepared from the following raw materials of aluminum isopropoxide, silane coupling agent KH570, tetraethyl orthosilicate, Span 80, polyethylene glycol, i-butyltriethoxanesilane, polyvinyl alcohol, emulsifier OP10, glycerin, Tween 80, lauryl sodium sulfate, triethanolamine, benzotriazole, sodium benzoate, halloysite, borax, a proper amount of peregal, a proper amount of nitric acid, a proper amount of hydrochloric acid, a proper amount of absolute ethyl alcohol, and a proper amount of deionized water. The halloysite nanotube-added abrasion-resistant type strippable macromolecular antirust film has the advantages that a thin film can be formed on the surface of a workpiece, the waterproof and oilproof effects are realized, the easiness in cracking is avoided, the heat-resistant and aging-resistant properties are good, the antirust and anti-corrosive functions are good, the later stripping is convenient, and the antirust film is suitable for being popularized.

The invention relates to technical field of research, development and manufacture of thermal insulation materials, and discloses a thermal insulation material with an anti-corrosion effect. The thermal insulation material is prepared from the following components: 40 to 45 parts of quartz fiber, 20 to 25 parts of potassium hexatitanate whisker, 14 to 18 parts of starch solution, 12 to 15 parts ofaerogel silicon dioxide, 10 to 15 parts of silicone oil, 10 to 12 parts of amide, 4 to 6 parts of aluminum polychlorid, 1.0 to 1.5 parts of glass powder, 0.8 to 1.0 part of titanium dioxide, and 14 to20 parts of water. The thermal insulation material improves the corrosion resistant performance and waterproof performance, and as potassium hexatitanate whisker has excellent mechanical property andcorrosion resistance, but is difficult to be adhered to fiber and particularly adhered to silicon oxide fiber products containing more residue balls, the thermal insulation material further improvesthe corrosion resistant performance through modification, and further has the advantages of thermal insulation, fire protection, corrosion protection, economical efficiency and environmental protection.

The invention discloses a waterproof coating with environment-friendliness, high adhesion, weather resistance, abrasion resistance, anti-fouling and self-cleaning functions. The waterproof coating isprepared from amine-terminated polyether, a liquid amine chain extender, isocyanate, oligomer diol, acrylic resin, organosilicon modified polyurethane, powder and auxiliary agents, wherein the auxiliary agents are filler, a reinforcing agent, a cross-linking agent, a catalyst, a plasticizer, a chain extender, pigment, a tackifier, a stabilizer, a flame retardant and a heat resistant agent; the power is: special cement and graded sand; the waterproof coating has excellent adhesion of metal substrate, good elongation at break and tensile strength, and can maintain excellent performance under various environments, as well as excellent water resistance, excellent solar reflectivity, excellent long-term stain resistance, excellent physical and chemical properties, high tensile and impact strength, flexibility, wear resistance, wet resistance, aging resistance, anti-corrosion protection property and the like, and can spray-coat any substrate such as steel, wood, concrete and the like.

The invention relates to a metal bipolar plate with a graphene conducting layer and a manufacturing method thereof. The metal bipolar plate is arranged in a fuel cell. The metal bipolar plate comprises two metal flow field plates. The two metal flow field plates are respectively an anode side metal flow field plate and a cathode side metal flow field plate. Each of the metal flow field plates is respectively a first surface and a second surface. The first surface and the second surface are respectively provided with a plurality of diversion grooves. Graphene layers are disposed on the first surface and the second surface. The anode side metal flow field plate and the cathode side metal flow field plate are combined by welding or riveting. The invention discloses a light and thin metal bipolar plate with a graphene layer and a manufacturing method thereof, and the metal bipolar plate has good ductility, corrosion resistance, electrical conductivity and high thermal conductivity.

A demisable fuel supply system for a satellite includes a pressurized aluminum alloy tank with an aluminum alloy propellant management device therein. The propellant management device (PMD) can have any capillary action surface tension fluid transport features known in the art. Selected inner surfaces of the tank and the PMD are covered with a titanium based coating to guarantee propellant wettability and corrosion resistance of the fuel supply system.

The invention relates to an anticorrosive, abrasion-proof and rolling-resistant ground for a garbage discharging hall, and a construction method of the anticorrosive, abrasion-proof and rolling-resistant ground. The ground comprises a reinforced concrete structure layer (5) at a bottom, wherein an emery abrasion-proof layer (4), a middle cement-based crystallization layer (3), a carbamide resin-based layer (2) and a carbamide resin surface layer (1) are also arranged on the reinforced concrete structure layer (5) successively. The construction method comprises the following five steps in a layered construction manner from bottom to top: performing pouring, levelling, jolt ramming, calendering and forming at a time on the reinforced concrete structure layer (5); before prehardening, spreading dry nonmetal emery to form the emery abrasion-proof layer (4); performing brushing or roll painting with cement-based crystallization permeable crystallization paint to form the middle cement-based crystallization layer (3); constructing the carbamide resin anticorrosive-based layer (2); finally, using a spraying method for constructing the carbamide resin surface layer (1). The ground structure and the construction method has the advantages that high corrosion resistance, abrasion resistance and rolling resistance are achieved, the durability of floor grounds is improved, and the maintenance cost is low.

The invention relates to a nano rare earth zeolite coating. A nano material and functional groups are grafted by activating a microporous material and dispersing modified adsorbed nanoparticles; by means of physical action such as photocatalytic action and dipole moment, harmful substances, for example, TDI released by carbon monoxide, hydroxide, formaldehyde, benzene and polyurethane, in air aredecomposed and absorbed, so that the coating has the novel functions of removing smoke smell, odor, being mildewproof and antibacterial, killing bacteria and viruses, regulating temperature and humidity and purifying indoor air. Moreover, the coating releases negative ions and far infrared rays and diffuses plant fragrance permanently, and the color of the pattern is selected randomly. The coatingis bagged, so that the cost is saved. The materials are easily selected, and the coating is low in production cost, pollution-free, high in cost performance and high in scientific content. During construction, no glue is used, and the coating is directly sprayed, brushed, roll-sprayed and scrape-sprayed. The coating is good in adhesion, smooth in hand feeling, bright and flexible in feeling and comfortable and attractive. The coating is widely applied to the field of coating of buildings, and is suitable for the occasions such as habitable rooms, office rooms, hospitals, hotels and restaurants.

The invention relates to a method for manufacturing a super-hydrophobic silicon substrate. The method comprises the following steps of: photoetching and etching the silicon substrate through a traditional microelectronic process, thus processing a silicon column array in a micro scale; etching the silicon substrate by an oxygen plasma etching method; diluting and proportioning a nano-particle solution by deionized water, thus obtaining nano-particle suspension; soaking a silicon substrate structure subjected to hydrophilization treatment in the nano-particle suspension, and naturally evaporating the nano-particle suspension at room temperature in an evaporation table, or adding nitrogen to the nano-particle suspension for accelerating evaporation; etching nano-particles which are densely arranged on the surface of the structure by the oxygen plasma etching method within controlled reaction time, thus obtaining nano-particles of proper sizes; and settling intrinsically weak hydrophobic poly-p-xylylene by a chemical vapor deposition method, so that the poly-p-xylylene completely settles on the surface of the silicon substrate, and the final super-hydrophobic substrate is obtained. The micro-nano double-layer hierarchical composite structure is prepared by the micro-nano processing technique, the method is simple in process and high in periodicity, and the raw materials are easily available.

The invention discloses a flexible safety protective guard for a highway. The protective guard comprises a long-strip-shaped PVC resin plate and is characterized in that the inner layer of the PVC resin plate comprises a reinforcing band woven by epoxy glass fiber in at least two directions, a photoluminescent material layer is clamped in the reinforcing band, and a pure polyester thermalsetting powder coating spraying layer wraps the outer layer of the PVC resin plate. According to the protective guard, due to the fact that the reinforcing band woven by the epoxy glass fiber is selected as the inner layer of the PVC resin plate, the elasticity is better when the original anti-impact effect is guaranteed, the impact force can be buffered in collision, and safety is improved. Due to the fact that the photoluminescent material layer is clamped in the reinforcing band, the light reflecting alarming effect of the protective guard can be better under the condition that light is poor at the misty and rainy night.

The invention relates to the field of compressor production, in particular to a surface spraying device for a compressor cylinder body. The surface spraying device comprises a conveying belt, whereina first fixing assembly, a second fixing assembly and a third fixing assembly are arranged on a stand of the conveying belt in sequence; the structures of the first fixing assembly, the second fixingassembly and the third fixing assembly are the same, and each of the fixing assemblies comprises two symmetrically arranged fixing pieces; the two fixing pieces are respectively arranged on two sidesof the stand of the conveying belt; a spraying device is arranged between the first fixing assembly and the second fixing assembly; the spraying device is arranged on the stand of the conveying belt;a drying device is arranged between the second fixing assembly and the third fixing assembly; and the drying device is arranged on the stand of the conveying belt. The surface spraying device has theadvantages that the device can spray a coating to an aluminum alloy and improve the corrosion resistance performance, the heat isolation property and the like of the compressor cylinder body; and thesurface spraying device is further provided with the drying device, so that the coating can be quickly dried.

The invention discloses a topology optimization design method of a periodic multi-material structure, belonging to the technical field of structure optimization. Based on the bi-directional asymptoticstructure optimization method, the topology optimization model of periodic multi-material structure is constructed. By defining the initialization parameters, setting the material transformation rules, solving the sensitivity number and optimizing the structure, cyclic iteration is carried out according to the target volume and the final convergence condition of each material, thus completing thetopology optimization design of periodic multi-material structure. This method can make the designed macrostructure not only possess the regularity of periodic structure, has many advantages, such asorderliness, aesthetics, good workmanship and so on, also has many composite characteristics, such as high strength, anti-corrosion, anti-fatigue, high wear resistance, strong insulation and lightweight, and can be widely used in aerospace vehicle, weapon equipment, high-speed rail transit and construction machinery and so on.

The invention discloses a method for preparing a SiTiOC ceramic coating, and belongs to the technical field of chemical synthesis and ceramic coating preparing. The method comprises the following steps that firstly, butyl titanate and an organic silicon compound are subjected to the chemical reaction, and a titanium organic silicon compound is prepared; secondly, the surface of a base body is coated with the titanium organic silicon compound, and curing is conducted; and thirdly, continuous lasers are utilized for scanning a solid titanium organic silicon coating prepared in the second step, the coating is split, and the SiTiOC ceramic coating is obtained. The method is simple, convenient and easy to operate, the preparing period is short, and the efficiency is high; laser scanning cannot generate negative effects on the shape or structure performance of the base body; the prepared SiTiOC ceramic coating is low in porosity, has excellent corrosion preventing, abrasion resisting and friction reducing properties, is not prone to generating cracks, is suitable for scale production and has wide application prospects in the fields of aerospace, national defense, chemical engineering, machinery, electric power, electrons and the like.

The invention discloses micro emulsion cutting fluid for hard and brittle material processing. The micro emulsion cutting fluid is prepared from the following raw materials: refined mineral oil, secondary alkyl sodium sulfonate, lauryl dimethyl amine oxide, coconut oil fatty acid diethanolamide, alkyl alcohol amine, barium petroleum sulfonate, benzotriazole, sodium chloride, glycerin, diethanol amine, a defoaming agent, phosphate polyoxyethylene nonyl phenol, graphene oxide, a proper amount of N,N-dimethyl formamide, N-hydroxysuccinimide, 1-ethyl-(3-dimethyl-amino-propyl) carbodiimide hydrochloride, sulfanilic acid, dodecylbenzene sulfonic acid, potassium peroxodisulfate, a proper amount of aniline and a proper amount of deionized water. A preparation method of the micro emulsion cutting fluid is easy and convenient, and the micro emulsion cutting fluid is high in lubricating property, wear resistance, friction reduction property and cooling property, can improve the processing precision of a workpiece, is extremely high in rust protection and corrosion inhibition performance and long in service life, and supplies high processing precision to the workpiece.

The invention discloses a polyurethane spraying outer protection pipe spraying integrally-formed prefabricated heat preservation valve and a spraying method. By adopting a traditional prefabricated directly-buried heat preservation process, a heat supply pipe network and a pipeline valve have the disadvantages of uneven heat preservation forming, halfway splicing and welding of an outer protectionpipe, great heat loss for integral heat preservation and short service life of a heat preservation valve. The heat preservation valve comprises a prefabricated directly-buried heat preservation valvewhich comprises a working pipe, wherein polyurethane protection layers (3) are sprayed to the outer layers of a horizontal pipe and a vertical pipe of the working pie separately through a polyurethane mixing spray head (6), valve welding ports (1) without the polyurethane protection layer are left at two ends of the horizontal pipe, high polymer liquid protection layers (4) are sprayed to the outer surfaces of the polyurethane protection layers by a high pressure spray gun, a group of alarm lines (2) is mounted in each polyurethane protection layer, and the high polymer liquid protection layers are made of high polymer liquid elastic materials with densities being 1.2 q / cm<3> and the coatings are 1-20 mm thick. The invention relates to the polyurethane spraying outer protection pipe spraying integrally-formed prefabricated heat preservation valve.

The invention relates to an anti-moth paint mortar and preparing method thereof. The raw material of anti-moth paint mortar comprises refined raw lacquer, quartz powder, quicklime powder, wood powder, stalactite powder, insect repellent, adhesive. The materials is prepared from, by weight, 30-40 parts of refined raw lacquer, 25-35 parts of quartz powder, 20-25 parts of quicklime powder, 15-22 parts of wood powder, 5-12 parts of stalactite powder, 10-15 parts of insect repellent and 8-12 parts of adhesive. The preparing steps are as follows: (1) preparing the mixed powder; (2) preparing the insect repellent; (3) mixing. The anti-moth paint mortar adopts fungal enzyme for refining processing of raw lacquer, and can effectively adjust the rheology of the raw lacquer. The produced paint mortar has strong adhesion and high hardness, with corrosion-resistant, wear-resistant, and anti-moth function. It is easy to be smeared on the wood embryo to improve the hardness and strength of wood embryo and to fill the holes as well as the gaps on the board. The anti-moth agent is made by the extraction of active ingredients from Chinese medicine, and enhances the pest control effect on the board.

The invention discloses a high-strength wear-resisting anti-corrosion bolt which comprises a high-strength body. The outer surface of a screw head of the high-strength body is electroplated with a wear-resisting layer, the outer surface of a screw rod of the high-strength body is electroplated with an anti-corrosion layer, the wear-resisting layer is prepared from, by mass, 5-9 parts of vanadium,2-6 parts of cobalt, 6-14 parts of manganese, 10-20 parts of magnesium and 3-5 parts of molybdenum. The anti-corrosion layer is prepared by mixing, by mass, 42-46% of nickel powder, 41-49% of zinc powder and the balance chromic acid. In this way, the high-strength wear-resisting anti-corrosion bolt can have the advantages of being high in strength and resistant to wear and corrosion, the durability is greatly improved, and the service life is long.

Provided is a novel adhesive sheet which is capable of exhibiting an effect of sufficient corrosion prevention for silver and copper, and of which the relative permittivity and the temperature dependence thereof can be reduced. Proposed is a single-layer adhesive sheet including an adhesive layer containing a polyolefin, an acrylic polymer, and a nitrogen heterocyclic compound; or a multilayer adhesive sheet provided with the adhesive layer as a surface layer.

The invention discloses a charging pile board and a preparation method thereof. The charging pile board comprises 50-80% of continuous filaments, 20-40% of polyurethane resin, 0-15% of additives, and 1-10% of a curing agent according to weight percentage. The continuous filament adopts one or two of a basalt fiber, a glass fiber and a carbon fiber, and is in the forms of long fiber, fiber mat and fiber woven fabric, the additive is calcium carbonate, and the curing agent is one of hexahydrophthalic anhydride and diacetone acrylamide. The charging pile board has the advantages of excellent corrosion resistance, weather fastness, waterproofness and the like.

The invention provides a corrosion-resistant and scratch-resistant additive for crystal waste residue extraction coating materials, wherein the component of the formula comprises 100% of crystal waste residue. According to the present invention, the additive is extracted from crystal waste residue, the main component is crystal glass powder, the particles are fine, and the hardness of the crystal glass powder is up to 7 Mohs hardness; the additive further contains emery, cerium oxide and other powder, wherein the hardness of the powder is up to 9.5 Mohs hardness and is only inferior to diamond, and the powder is dispersed in the coating material so as to be uniformly distributed, such that the hardness, the impact resistance, the wear resistance, the scratch resistance and the corrosion resistance of the paint film can be improved; the cerium component in the crystal waste residue has the anti-ultraviolet effect and can protect the substance covered under the paint film; the crystal waste residue recovery and utilization problem is solved, and the crystal waste residue becomes the valuable resource again; and the corrosion-resistant and scratch-resistant additive prepared from the crystal waste residue has advantages of low cost and good effect, can replace the same product, and can save a lot of mining resources.

The invention provides a graphene wear-resistant PE (polyethylene) composite material for a carrier roller. The graphene wear-resistant PE (polyethylene) composite material for a carrier roller is prepared from the following raw materials in parts by weight: 0.5 to 2 parts of graphene, 40 to 65 parts of high-density polyethylene, 5 to 25 parts of alkali-free glass fiber, 10 to 25 parts of ultra-high molecular weight polyethylene, 3 to 8 parts of talcum powder, 1 to 3 parts of adhesive, 1 to 3 parts of grafting agent, 0.1 to 0.5 part of antioxidant, 0.1 to 0.5 part of a light stabilizer; 0.1 to 0.5 part of a lubricant, wherein the total parts are 100. Performance detection is carried out on the prepared graphene wear-resistant PE composite material for the carrier roller, and obtained main performance data are as follows: the basic requirements for manufacturing carrier roller products are as follows: the tensile strength is larger than or equal to 40 MPa, the elongation at break is larger than or equal to 10%, the bending strength is larger than or equal to 53 MPa, the bending modulus is larger than or equal to 2980 MPa, and the relative abrasion loss is smaller than or equal to 170 mm<3>.

The invention discloses a high-sensitivity vacuum leakage detection device, and the device comprises a vacuum cover assembly, a vacuum pumping system, and a pressure precise control assembly. The vacuum cover assembly comprises a vacuum cover body and a sealing strip. The edge of the opened end of the vacuum cover body is annularly connected with a sealing groove in a fixed manner, and the sealingstrip is disposed in the sealing groove. An outer side of the sealing strip is provided with observation window glass. The vacuum pumping system comprises a vacuum pump, and the vacuum pump is communicated with the vacuum cover body through a corresponding air pipe and an inlet valve, and is used for vacuum pumping. The pressure precise control assembly comprises a pressure regulating valve and ahigh-precision negative pressure meter, and the pressure regulating valve and the high-precision negative pressure meter are disposed on the vacuum cover body, and are respectively used for regulating and observing the pressure value in the vacuum cover body. The device provided by the invention reduces the weight, improves the leakage detection sensitivity and the reliability and operability, and reduces the labor intensity of the inspection personnel.

A processing method of soft solar cell component and its specific steps include: 1) polymer film is evenly paved firstly; 2) cloth substrate is cut into needing size, and is pave on the polymer film; 3) solar cell chips are set into the cloth substrate, and are low-temperature-and-heat-pressure fixed by using laminating machine; 4) the chips are taken out then to carry welding and protection; 5) the fixed solar cell components are paved with their surface downward, and the cloth substrate is paved on the top; 6) using laminating machine, the solar cell components enter hot pressing step to be packed; 7) the components are taken out, and their margins are cut into tidy; 8) outlet line and bandage parts are processed. Through hot-pressing processing and clinging into soft carrier (like cloth substrate) or protective film, the solar cell can be arbitrarily bended and easy to carry. Being covered by ethylene-polytetrafluoroethylene (ETFE) protective film, the production has characters of high dirt resistance, anticorrosion, tensile resistance, collision resistance, heat resistance and insulation.

The invention relates to a toon tree wood antiquing treatment agent. The treatment agent consists of medicine liquid A, medicine liquid B and medicine liquid C, wherein the medicine liquid A is prepared by the following raw materials in parts by weight: 9.5 parts of folium isatidis, 7 parts of wild jujube leaves, 1.8 parts of divaricate saposhnikovia root, 3.2 parts of herba cepbalanoplosis segeti, 0.5 part of rhamnus utilis, 8 parts of quick lime, and 200 parts of water; the medicine liquid B is prepared by the following raw materials: 4 parts of rhizoma sparganii, 3.6 parts of radix stemonae, 4 parts of sandalwood, 2.5 parts of rhizoma alismatis, 7.2 parts of sodium hydrogen sulfate, and 120 parts of water; and the medicine liquid C is prepared by the following raw materials: 5 parts of sodium bicarbonate, and 150 parts of water. The toon tree wood antiquing treatment agent is prepared by mainly adopting traditional Chinese medicine components; and through reasonable matching and synergic effect between the traditional Chinese medicine components and inorganic components, the treatment effect is good, the antiquing effect is uniform and natural, textures are continuously distributed, the internal wood structure is free of corrosion, and the wood effects of corrosion resistance and insect resistance can be enhanced.

The invention discloses a chemically-plated Ni-P / Ni-Mo-P-PTFE composite structure plating layer and a preparation method of the chemically-plated Ni-P / Ni-Mo-P-PTFE composite structure plating layer and belongs to the technical field of functional plating layers. The surface of the composite structure plating layer is a Ni-Mo-P-PTFE plating layer, and the metal base material of the composite structure plating layer is a Ni-P plating layer. The preparation method of the composite structure plating layer includes the following steps that the deoiling, acid pickling and activating treatment are conducted on the metal base material; the Ni-P plating layer chemically plated on the surface of the metal base material serves as an inducing layer; the Ni-Mo-P-PTFE plating layer is chemically plated on the Ni-P plating layer; and cleaning and drying are conducted. By the adoption of the Ni-P / Ni-Mo-P-PTFE composite structure plating layer prepared through the preparation method, by adjusting the microstructure of the plating layers, the physical performance and chemical performance of the plating layers are improved, and the corrosion performance and scaling resistance of pipelines can be improved remarkably.