37results about How to "Achieve long-term protection" patented technology

The invention provides herbaceous plant nutritive water based on an emulsified microcapsule and a preparation method of the herbaceous plant nutritive water. The preparation method comprises the following specific steps: mixing hydrogenated vegetable oil, low erucic acid rapeseed oil , siloxane, microcrystalline wax and diglycerol, heating and uniformly stirring, and performing heat reservation and sterilization to obtain an oil phase; adding ethylene glycol, propylene glycol, glycine betaine, urea, poly-sodium glutamate, triethanolamine, caprylhydroxamic acid and hexylene glycol into deionized water, heating and uniformly stirring, performing heat preservation and sterilization to obtain a water phase; adding the oil phase into the water phase, performing heating, homogenization and low-speed stirring, adding cetyl ethyl hexanoate and stearic acid, then slowly adding PEG-40 hydrogenated castor oil and a microcapsule wall material, cooling, adding tremella, centella asiatica, polygonum cuspidatum, scutellaria baicalensis, tea leaves, glycyrrhiza glabra, female chrysanthemum, rosemary leaves, beer saccharomycete and grape fruit cell extract active components, and adding chondrus crispus extracts, bio-saccharide gum-1, diglycerol, palmitoyl tripeptide-1 and essence for mixing to obtain the herbaceous plant nutritive water based on the emulsified microcapsule.

The invention discloses a concrete pile protection method used in the marine environment. According to the method, firstly the surface of a concrete pile is polished, and then the surface of the pile is coated with an epoxy primer layer and an epoxy intermediate paint layer. The paint coating layer is wrapped with corrosion prevention tape after being cured and is further wrapped and fastened by a prefabricated armor, and the upper end and the lower end of the paint coating layer which is wrapped and fastened by the armor and the flange connection position are filled with in-water curing epoxy adhesives, and the airtightness of a whole protective system is improved. The concrete pile protection method is simple in structure, convenient to construct and remarkable in preservative effect, achieves long-acting protection of the concrete pile and guarantees that the service life of concrete engineering can be equal to or even be longer than the service life required by the design. By the adoption of the concrete pile protection method, it is guaranteed that the service life can reach over 20 years to 30 years, if the armor is destroyed by external force, the armor can be replaced quickly without destroying the whole system, and construction is very convenient in the later maintenance process.

The invention relates to the field of oil equipment, particularly to a novel sucker rod coupling and a production process thereof. The novel sucker rod coupling comprises a main body, the main body is a hollow cylinder, the middle of the hollow cylinder is provided with square-neck surfaces matched with a double-edge wrench, the two square-neck surfaces are parallel, and the middle of the main body is provided with an axial internal threaded hole. The novel sucker rod coupling is characterized in that the outer surface of the main body is partially or totally covered with copper-based alloy composite coating, which is composed of, by weight percentage, 10-50% of hard tungsten carbide (WC) particles and 50-90% of copper-based alloy powder. According to the novel sucker rod coupling, the copper-based alloy composite coating and nickel-based alloy coating at both ends of the outer surface of the coupling are connected through transitional sections to ensure continuity and high quality and further to achieve obvious prolonging of the service life and long-term protection on the inner wall of a sucker rod.

The invention discloses a water-borne photoresponse self-repairing coating material and a preparation method thereof. The coating material is composed of an organic silicone modified water-borne epoxyresin emulsion, MXene, water, a water-borne amine curing agent, a dispersant, a flatting agent and a defoaming agent which are mixed in a certain number of parts by mass. According to the water-bornephotoresponse self-repairing coating material and the preparation method thereof, the two dimensional layered material MXene is used as a photothermal filler, the MXene and the organic silicone modified water-borne epoxy resin are dissolved in water, then the water-borne amine curing agent and an addition agent are added, the water-borne photoresponse self-repairing coating material can be obtained, at the same time, the problem of MXene agglomeration is solved, and the photothermal efficiency of the MXene is improved; and the preparation process of the coating material is simple, security and environmental protection are realized, controllable and fast self-repairing can be conducted through visible light or infrared light irradiation response after the water-borne photoresponse self-repairing coating material is prepared into a coating, and the water-borne photoresponse self-repairing coating material is suitable for large-scale production.

The invention discloses a fluorine-silicon nanometer waterproof and heat-insulating composite material and a preparation method thereof, comprising the steps of: 1) adding fluorine-containing polymer resin and xylene into a jacketed cylinder and stirring evenly; 2) raising the temperature of the liquid in the cylinder to 40-40 60°C, then add nano-silicon solution and stir while stirring, keep the temperature at 40-60°C, stir for 20-40 minutes, then cool to 20-30°C, the above-prepared fluorosilicon nano-resin solution is ready for use; 3) In the material Add fluorine-containing polymer resin, dispersant, and inorganic pigment powder into the tank for high-speed dispersion, and prepare a pigment slurry; 4) Add fluorosilicon nano-resin liquid into the material tank, add pigment slurry, add defoamer, leveling agent, base material Wetting agent, elastic resin, 5 thermal insulation materials, and butyl acetate are stirred to obtain the A component of the fluorosilicon nano-waterproof and heat-insulating composite material; the A component and the coating B component cross-linking agent form the fluorosilicon nano Waterproof and thermal insulation composite. The waterproof and heat-insulating paint of the invention has good weather resistance and corrosion resistance, and is environmentally friendly.

The invention discloses an anti-corrosion process for a steel structure. The anti-corrosion process comprises the following steps of S1, surface pretreatment of the steel structure, S2, surface descaling of the steel surface, S3, preparation of waterborne rust anticorrosive coating for the steel structure, S4, preparation of a primer, S5, steel structure coating, and S6, paint coating quality inspection and acceptance. The anti-corrosion process combines the characteristics of an epoxy emulsion and an acrylic emulsion to improve the comprehensive performance of the coating, a polyaniline emulsion is directly added into the coating to solve the compatibility problem between polyaniline and other polymer emulsions and the stability problem of the prepared anticorrosive coating, the anti-corrosion performance of the coating is improved, acid and active hydrogen in conversion liquid and polyaniline can promote the curing of the epoxy resin to be used as a curing agent for an epoxy emulsion, the process is simple, and the cost is low. The anti-corrosion process of the steel structure is simple, has good anti-corrosion performance and simple construction, can greatly reduce the labor intensity of coating, has high weather resistance, and can realize long-term protection for the steel structure.

The application relates to a composition for moisturizing and maintaining a skin barrier, a preparation method thereof and application of the composition. The composition for moisturizing and maintaining the skin barrier is prepared from the following components in parts by weight: 0.1-3 parts of bifida ferment lysate,0.05-1 part of lactobacillus ferment lysate and 0.01-1 part of lotus seed fermentation liquor; The invention further relates to a preparation method for the composition for moisturizing and maintaining the skin barrier, and the bifida ferment lysate, the lactobacillus ferment lysate and the lotus seed fermentation liquor are mixed, and are uniformly stirred to obtain the composition for moisturizing and maintaining the skin barrier. The composition has the effect of protecting the skin well for a long time.

The invention discloses a fluorine-silicon nanometer waterproof heat-insulating composite material and a preparation method thereof. The preparation method comprises the following steps: 1) adding fluorine-containing polymer resin and xylene into a jacket cylinder, and carrying out uniform stirring; 2) heating liquid in the cylinder to 40-60 DEG C, then adding a nanometer silicon solution while stirring, carrying out stirring for 20-40 minutes while keeping a temperature at 40-60 DEG C, and carrying out cooling to 20-30 DEG C to obtain a prepared fluorine-silicon nanometer resin solution for later use; 3) adding fluorine-containing polymer resin, a dispersing agent and inorganic pigment powder into the material cylinder, and carrying out dispersing at a high speed to prepare pigment paste;4) adding the fluorine-silicon nanometer resin solution into the material cylinder, adding the pigment slurry, adding an antifoaming agent, a leveling agent, a substrate wetting agent, elastic resin,a thermal insulation material 5 and butyl acetate, and carrying out stirring to obtain a component A of the fluorine-silicon nanometer waterproof heat-insulating composite material, wherein the component A and a coating component B form the fluorine-silicon nanometer waterproof heat-insulating composite material. The waterproof heat-insulating coating is good in weather resistance and corrosion resistance and friendly to environment.

The invention discloses a water-based steel structural anti-corrosive coating. The water-based steel structural anti-corrosive coating is prepared from, carbon titanium modified acrylic resin, dispersing agent, wetting agent, pigment, filler, anti-foaming agent, anti-flash-rust agent, anti-sinking agent, coalescing agent, thickening agent, pH adjusting agent, fungicide, and de-ionized water. The water-based steel structural anti-corrosive coating can carry out construction along with rust, and has low requirement on construction environment, thus the coating labor intensity is largely reduced; especially, the coating has super-strong scratching self-repair ability, and the heavy anti-corrosive field needs not use the zinc-enriched primer, thus the environmental protection property and reliability of the heavy corrosion prevention are greatly increased. The water-based coating is applied to the heavy corrosion prevention, and the construction simplicity and corrosion prevention are better than the existed oily coating. The coating has very strong weather resistance, and can realize the long-term protection under the condition of thin coating thickness.

The invention discloses a corrosion resistance technology of a steel structure. The corrosion resistance technology of the steel structure comprises the following steps of S1, carrying out surface pretreatment on the steel structure; S2, derusting the surface of a steel material; S3, preparing a waterborne over-rust corrosion protective coating of the steel structure; S4, coating the steel structure; and S5, inspecting and accepting the oil paint coating quality. According to the corrosion resistance technology of the steel structure provided by the invention, the characteristics of an epoxy emulsion and an acrylic emulsion are combined, so that the combination property of a coating is improved; a polyaniline emulsion is directly added into the coating, so that the compatible problem of polyaniline and other macromolecule emulsions and the stability problem of the prepared corrosion-resistance coating are solved, and the corrosion resistance of the coating is improved; and acid and reactive hydrogen in the polyaniline can promote the curing of the epoxy resin, and the polyaniline is used as a curing agent of the epoxy emulsion, so that the process is simple and low in cost. The corrosion resistance technology of the steel structure is simple, not only has favorable corrosion resistance, but also is simple and convenient to construct, is capable of greatly relieving the labor intensity of coating, has high weather resistance at the same time, and can realize long-time protection on the steel structure.

The expansive soil side slope flexible ecological supporting structure comprises a vegetation protection pad, anchor rods, U-shaped nails, a cutting / drainage ditch and slope protection vegetation, the vegetation protection pad is flatly laid on the surface of an expansive soil side slope and is attached to a soil body, and the edge part of the vegetation protection pad is embedded into the bottom of the cutting / drainage ditch; the anchor rods are arranged in the grids of the vegetation protection pad in a rectangular shape; the U-shaped nails are used for fixing the vegetation protection pads between the anchor rods and at the edge of the intercepting / draining ditch; the vegetation protection pad is fixed at the bottom of the interception / drainage ditch, the interception / drainage ditch is manufactured at the upper part according to the designed depth, and the interception / drainage ditch is finally merged into a drainage system and is arranged at the side slope protection outer edge; the slope protection vegetation is densely planted in the three-dimensional grid space of the vegetation protection pad. Surface layer protection of the slow expansive soil side slope can be achieved, the overall stability of the side slope is improved, and the long-term treatment effect is good.

The invention discloses a polyaspartic acid resin luggage compartment coating and a preparation method and application thereof. The coating is composed of a main agent and a curing agent, wherein theweight parts of the main agent and the curing agent are 100: 25 to 100: 42, wherein the main agent adds corresponding materials such as flame retardant, dispersant, dustproof agent, defoamer, pigment,filler, light absorber, light stabilizer, catalyst, wear-resistant powder, leveling agent, solvent and the like by using polyaspartate resin; the curing agent uses polyisocyanate to add water absorbent, solvent and other materials, and the prepared main agent and curing agent are used together to obtain polyaspartic acid resin luggage compartment coating. The polyaspartic acid resin luggage compartment coating can be dried under the conditions of self-drying or low-temperature baking after coating, and the thickness of the one-time coating film is 30-80 mum. The polyaspartic acid resin luggage compartment coating has the characteristics of thin coating, long-term protection, excellent medium resistance, high solid content, excellent wear resistance, flame retardancy, decoration and the like.

The invention discloses a saline-alkali area concrete salt erosion transmission inhibition material. The saline-alkali area concrete salt erosion transmission inhibition material comprises the following components by weight: 10-15 parts of epoxy modified polysiloxane, 15-20 parts of polypropylmethylsilsesquioxane, 15-20 parts of mercaptopropyl silane, 5-10 parts of short-fluoro chain fluorine-containing polyacrylate, 10-15 parts of nano alumina, and 20-30 parts of water. The concrete erosion resistant material provided by the invention has excellent protective performance to saline-alkali area concrete, and can effectively inhibit salt erosion and guarantee the concrete service life. The material provided by the invention utilizes the nano-filling hole blockage effect of nano alumina to reduce concrete porosity so as to improve compactness.

The invention discloses an anticorrosive coating for a steel structure in alkaline steam environment. The anticorrosive coating is prepared from the following components in percentage by mass: 25% to30% of organosilicone macromolecular polymer, 10% to 30% of dispersant, 0.8% of defoaming agent, 1.1% to 1.3% of thickener, 25% to 30% of SiO2 (silicon dioxide) powder, 20% to 25% of Al2O3 (aluminum oxide) powder, and 3% to 5% of TiO2 (titanium dioxide) powder. The anticorrosive coating has the advantages that the anticorrosive coating can be constructed with rust, the requirement for constructionenvironment is low, and the labor intensity of coating is greatly decreased; the certain self-cleaning ability is realized, the zinc-rich primer is not needed in the heavy anticorrosive field, and the environment-friendly property and reliability of heavy anticorrosive treatment are greatly improved.

The invention relates to the technical field of dam slope protection, and discloses a dam slope protection device. The dam slope protection device comprises a plurality of dam protection units installed on a dam, the dam protection units comprise water feeding mechanisms, water diversion mechanisms and protection grilles, wherein the water feeding mechanisms comprise pump bodies and blade drive assemblies, the blade drive assemblies comprise blade wheel hubs, blade devices circumferentially and uniformly arranged on the blade wheel hubs and rotating shafts coaxially arranged with the blade wheel hubs, the blade devices comprise blades and elastic pieces; the blades are installed on the blade wheel hubs through the elastic pieces, the upstream faces of the blades are directly faces the water flow direction, one ends of the rotating shafts are fixedly connected with the blade wheel hubs, and the other ends of the rotating shafts are connected with the power input ends of the pump bodies.According to the dam slope protection device, the water flow in a river channel can be conveyed to the upper part of the dam through a pipeline, electric energy is not consumed in the water conveyingprocess, the energy is saved, the environment is protected, the growth requirement of the slope protection grass is guaranteed, the better slope protection effect is achieved, the maintenance cost ofthe slope protection is reduced, and the dam slope protection device is easy to popularize and use.

The invention discloses a construction method of a cow mastitis pathogenic bacterium triple epitope gene and garrupa c type lysozyme gene recombinant adenovirus and application. In the tests, cow mastitis main pathogenic bacterium special proteins are selected, two B cell epitopes of each protein are obtained through prediction of an ABCpred scheme and a BepiPred scheme and are connected to obtain a TRE sequence, a cLYZ sequence is obtained on GeneBank, and a mammalian cell bias codon is optimized. Thoseaasigna virus 2A (T2A) self-cleavable peptide with high shearing efficiency is inserted between the TRE sequence and the recombinant adenovirus cLYZ sequence, and after synthesis, a pMD-19T vector containing a target gene fragment is obtained. A TRE gene, a T2A gene and a cLYZ gene are subcloned onto a shutter vector pDC315-MCS-EGFP; a recombinant shuttle vector and an adenovirus big skeleton pBHGlox(delta)E1, 3cre co-transfect an HEK293 cell by utilizing a LipoFiterTM liposomes transfection method, so that homologous recombination is realized, and the recombinant adenovirus Ad-TRE-T2A-cLYZ-EGFP is obtained.

The invention provides an alloy powder material, a preparation method of the alloy powder material and application of the alloy powder material in a seawater corrosion resistant laser cladding material. The material comprises the following raw materials in percentage by mass: 38-45% of Ni, 3-6% of Al, 4-8% of W, 0.5-1.5% of Fe, 0.5-1.5% of Mn, 0.5-1% of Sb and the balance of Cu. The total amount of other impurity elements in the material is smaller than or equal to 0.15%. During preparation, raw material powder is weighed according to the proportion, Cu is heated and melted, then Ni is added, other raw materials are added after Cu and Ni are completely melted, molten alloy melt is obtained, the molten alloy melt is poured into a crucible of an atomization rapid condensation device, atomization powder making and screening are conducted through the device, and the alloy powder material is obtained. The alloy powder material is applied as a seawater-corrosion-resistant laser cladding material and can be metallurgically bonded with a to-be-protected workpiece, so that the corrosion-resistant life is greatly prolonged.

The invention discloses carbon-titanium water-based resin flame-retarding paint. The carbon-titanium water-based resin flame-retarding paint is prepared from the following components: carbon-titanium modified acrylic resin, a wetting agent, a dispersant, a pigment, functional filling, a de-foaming agent, a flush-rust-proof agent, a film-forming auxiliary agent, an anti-sedimentation agent, a pH (Potential of Hydrogen) regulator, a sterilizer and de-ionized water. The carbon-titanium water-based resin flame-retarding paint disclosed by the invention takes a nanomaterial, namely special modified styrene-acrylic resin, as a film forming substance, and realizes long-period protection under the condition of a relatively thin coating thickness. Furthermore, after the paint is coated, moisture is volatilized to a certain degree and curled hydrophobic molecular chains in the resin start to expand and crossly link, and phase overturning is rapidly realized to eliminate residual moisture out of a paint film. Therefore, the drying speed of the paint is obviously faster than that of a common sticking material and the paint is dried completely, so that the number of construction times of the paint can be reduced, the difficulty of a coating process is greatly reduced and the construction cost is reduced.

The invention provides herbaceous plant nutritive water based on an emulsified microcapsule and a preparation method of the herbaceous plant nutritive water. The preparation method comprises the following specific steps: mixing hydrogenated vegetable oil, low erucic acid rapeseed oil , siloxane, microcrystalline wax and diglycerol, heating and uniformly stirring, and performing heat reservation and sterilization to obtain an oil phase; adding ethylene glycol, propylene glycol, glycine betaine, urea, poly-sodium glutamate, triethanolamine, caprylhydroxamic acid and hexylene glycol into deionized water, heating and uniformly stirring, performing heat preservation and sterilization to obtain a water phase; adding the oil phase into the water phase, performing heating, homogenization and low-speed stirring, adding cetyl ethyl hexanoate and stearic acid, then slowly adding PEG-40 hydrogenated castor oil and a microcapsule wall material, cooling, adding tremella, centella asiatica, polygonum cuspidatum, scutellaria baicalensis, tea leaves, glycyrrhiza glabra, female chrysanthemum, rosemary leaves, beer saccharomycete and grape fruit cell extract active components, and adding chondrus crispus extracts, bio-saccharide gum-1, diglycerol, palmitoyl tripeptide-1 and essence for mixing to obtain the herbaceous plant nutritive water based on the emulsified microcapsule.

The invention belongs to the technical field of coatings, and particularly relates to a high-performance flame-retardant coating and a preparation method thereof. The flame-retardant coating comprisesthe following components in parts by weight: 80-120 parts of a polymer of formula (1), 20-45 parts of polyurethane resin, 10-25 parts of melamine, 30-50 parts of solvent oil No. 200, 10-15 parts ofattapulgite, 3-8 parts of tricresyl phosphate, 5-10 parts of carboxymethyl cellulose, 5-10 parts of titanium dioxide, 10-15 parts of antimony trioxide, 3-8 parts of dimethyl phthalate, 1.5-2 parts ofa defoaming agent and 0.5-1 part of an antioxidant (as shown in the specification), wherein n is an integer ranging between 500 and 2000. The flame-retardant coating has advantages of high flame retardancy and easy construction, can greatly reduce labor intensity of coating, has relatively strong weather resistance, and can realize long-term protection.

The invention relates to a novel energy automobile motor with a favorable cooling effect and having a dustproof function. The novel energy automobile motor comprises a shell, a plurality of air inletmechanisms and a plurality of air outlet mechanisms, wherein a rotation shaft, a rotor winding, a stator, a driving mechanism, a plurality of fan blades and two bearings are arranged in the shell, theair outlet mechanism comprises a fixed rod, two connection rods and a plurality of air outlet assemblies, each air outlet assembly comprises air outlet holes, blocking blocks, a sliding rod, a pressure plate and a first spring, and the air inlet mechanism comprises an air inlet pipe, a filtering net, a driving block, a second spring and a connection block. In the novel energy automobile motor with the favorable cooling effect and having the dustproof function, hot air in the shell is conveniently discharged out of the air outlet mechanism through the air outlet holes, and the blocking blocksenter the air outlet holes during idling to prevent external dust from entering the air outlet holes and cause unsmooth air circulation; and moreover, the dust in the air is filtered by the filteringnet in the air inlet mechanism, dust accumulation is prevented to cause blocking, so that a favorable ventilation effect is guaranteed, and the practicability of the equipment is improved.

The invention provides a method for protecting a paper cultural relic containing transition metal, which comprises the following steps: a part needing to be protected in the paper cultural relic is contacted with a solution containing a protective agent, and the protective agent is alkane substituted by at least one hydroxyl group. According to the protection method of the paper cultural relic containing the transition metal ions, the protective agent is in contact with the paper cultural relic containing the transition metal pigment, the protective agent can be attached to the surface of the paper for a long time, and the situation that hydrogen peroxide and hydroxyl free radicals generated on the surface of the paper degrade and destroy a cellulose skeleton of the paper is avoided; therefore, the problems that the mechanical strength and the polymerization degree of the paper are reduced, and the paper is seriously discolored are effectively solved, and long-term protection of paper cultural relics is realized. In addition, the protective agent has the advantages of being simple, easy to obtain, non-toxic, harmless, economical, practical, green, environmentally friendly and the like.

The invention discloses a protection method for stone artifacts, which comprises: the surface of the stone artifacts is cleaned; a first protective agent composition is coated on the surface of the stone artifacts and solidified at room temperature to form a transparent basic protective layer; a second protective agent composition is coated on the basic protective layer and solidified to form a transparent intermediate protective layer under room temperature and illumination; and a third protective agent composition is coated on the intermediate protective layer and solidified at room temperature to form a transparent surface protective layer. By using the protection method for the stone artifacts, steles can be well protected, and the original morphology and structure can be maintained. At the same time, the formed composite protective layer has good waterproof, water-resistant, oil-dredging, corrosion-resistant, wear-resistant, corrosive gas and ultraviolet ray barrier property and other comprehensive properties. Besides, cultural relics can also maintain the natural 'breathing' effect.

The invention belongs to the technical field of metal corrosion resistance, and particularly discloses a corrosion-resistant aluminum alloy composite coating and a preparation method and application thereof. The aluminum alloy composite coating comprises lithium-aluminum layered double-metal hydroxide film layers and a metal organic framework material layer from inside to outside; and an amino acid corrosion inhibitor is arranged between the lithium-aluminum layered double-metal hydroxide film layers. The preparation method of the aluminum alloy composite coating comprises the following steps: placing an aluminum alloy base material in conversion liquid of the lithium-aluminum layered double-metal hydroxide film layers containing the amino acid corrosion inhibitor, and performing water bath conversion treatment to obtain a semi-finished product; and placing the semi-finished product in conversion liquid of the metal organic framework material layer, and performing hydrothermal conversion treatment to obtain the aluminum alloy composite coating. The grade of adhesive force between the prepared composite coating and the aluminum alloy base material is 0, the corrosion current density can be reduced by two orders of magnitude compared with that of untreated aluminum alloy, and the impedance value can reach 6.6819 x 10<5> to 1.6161 x 10<6> omega.cm<2>.

The invention relates to a chemically modified chlorinated polyether resin and an anticorrosive coating thereof. The chemically modified chlorinated polyether resin is modified by chemical reaction between a monomer containing carbon-carbon double bond and a chlorinated polyether resin, with viscosity of 1000-2500MPa.s. The use level of the reactants in the chemical reaction is as follows based onpart by weight: 1 part of chlorinated polyether resin, 2-4 parts of monomer containing carbon-carbon double bond, 3-5 parts of xylene and 0.03-0.05 part of mixed initiator; wherein, the monomer containing carbon-carbon double bond is one or more of ethyl acrylate, butyl acrylate, acrylic acid 2-ethylhexyl ester, methyl methacrylate, butyl methacrylate and styrene; the mixed initiator is the mixture of benzoperoxide and azodiisobutyronitrile, with weight ratio of 0.5-3 to 1. The anticorrosive coating with the chemically modified chlorinated polyether resin of the invention and the chlorinatedpolyether resin as base materials has obviously better storage stability, coating film gloss, mechanical property and various anticorrosion properties than the physically blended and modified chlorinated polyether resin coating.

The invention discloses a high-conductivity and corrosion-resistant graphite carbon protective multilayer composite coating as well as its preparation method and application. The highly conductive and corrosion-resistant graphite-like carbon protective multilayer composite coating includes a chromium-iridium transition layer and a graphite-like amorphous carbon layer formed sequentially on the surface of the substrate, wherein the content of iridium in the chromium-iridium transition layer is 2 ~10wt%. Further, the substrate includes a metal bipolar plate. The highly conductive and corrosion-resistant graphitic carbon protective multilayer composite coating provided by the present invention contains a chromium-iridium transition layer, which effectively provides a corrosion buffer layer through the doping of iridium elements, and the transition layer will form an oxide layer after corrosion. Iridium conductive path, this conductive path can avoid the continuous generation of chromium oxide layer, avoid the sharp increase of contact resistance, so as to realize the long-term protection of the metal bipolar plate.