Wear-resistant anticorrosive material and wear-resistant anticorrosive coating and application thereof, wear-resistant anticorrosive paint and preparation method and application thereof

Abstract

This invention relates to the field of corrosion protection, specifically to a wear-resistant and corrosion-resistant material and coating, their applications, and a wear-resistant and corrosion-resistant paint, its preparation method, and applications. The wear-resistant and corrosion-resistant material of this invention includes a wear-resistant and corrosion-resistant coating, the composition of which includes: epoxy resin, phenol-modified graphene, filler, nonionic dispersant, and curing agent; the epoxy resin includes phenolic epoxy resin and bisphenol A epoxy resin; the phenol-modified graphene includes graphene oxide and phenolic substances formed on the graphene oxide. The wear-resistant and corrosion-resistant paint of this invention has advantages such as good stability, good brushing performance, and simple construction process; the prepared coating exhibits excellent wear resistance, good acid / alkali resistance, strong adhesion, and good toughness.

Description

Technical Field

[0001] This invention relates to the field of corrosion protection, specifically to a wear-resistant and corrosion-resistant material and a wear-resistant and corrosion-resistant coating and their applications, as well as a wear-resistant and corrosion-resistant paint and its preparation method and applications. Background Technology

[0002] During oil and gas extraction, downhole metal equipment faces corrosion from dissolved oxygen, bacteria, under-deposit corrosion, CO2, and Cl. - While subjected to corrosion from chemical media such as H2S, downhole metal equipment also suffers from abrasion of the metal surface and surface coating by high-solids sand and gravel slurry, making corrosion prevention extremely difficult. Currently, solid powder coatings are commonly used for corrosion prevention of downhole metal equipment. However, this type of coating has high hardness, and when the metal equipment undergoes significant deformation, the coating is prone to brittle fracture and detachment, leading to well blockage, resulting in serious economic losses and safety hazards. Liquid coatings, with their high adhesion and good toughness, have become a research hotspot in downhole corrosion prevention in recent years. CN117363171A discloses a special coating for oil drill pipe based on polyurethane modified epoxy resin, which solves the application requirements of harsh working environments such as high temperature, high pressure, and strong chemical corrosion in downholes. However, this invention uses highly flexible epoxy resin, which has insufficient wear resistance, and its anti-corrosion effect is limited under gravel conditions.

[0003] CN118256130A discloses a graphene-modified phenolic epoxy / polyurethane coating, which exhibits excellent anti-corrosion and anti-scaling properties, solving the technical problem of epoxy resin coating failure at high temperatures and enabling the coating to serve for extended periods in drilling and extraction conditions at 160℃. However, this invention also does not disclose its wear resistance data, and its corrosion resistance under high-solids-content sand and gravel slurry conditions cannot be determined.

[0004] Currently, there is limited research on wear-resistant liquid anti-corrosion coatings in this field. Developing liquid anti-corrosion coatings with excellent wear resistance, good chemical corrosion resistance, high adhesion, and high toughness is a technical challenge in this field. Summary of the Invention

[0005] To overcome the problems of poor wear resistance and insufficient chemical corrosion resistance of existing liquid anti-corrosion materials or poor adhesion and toughness of solid powder coatings, this invention provides a wear-resistant anti-corrosion material and a wear-resistant anti-corrosion coating and their application, as well as a wear-resistant anti-corrosion coating and its preparation method and application. The wear-resistant anti-corrosion coating of this invention has the advantages of good stability, good brushing performance, and simple construction process. The prepared coating has excellent wear resistance, good resistance to hydrogen sulfide and salt spray, strong adhesion, and good toughness.

[0006] To achieve the above objectives, the first aspect of the present invention provides a wear-resistant and corrosion-resistant material, the wear-resistant and corrosion-resistant material comprising a wear-resistant and corrosion-resistant coating, wherein the wear-resistant and corrosion-resistant coating comprises: epoxy resin, phenol-modified graphene, filler, nonionic dispersant and curing agent; The epoxy resin includes phenolic epoxy resin and bisphenol A epoxy resin; The phenol-modified graphene includes graphene oxide and phenolic substances formed on the graphene oxide.

[0007] A second aspect of the present invention provides a wear-resistant and corrosion-resistant coating, the coating comprising component A and component B: By weight, component A comprises: 5-35 parts epoxy resin, 0.5-5 parts nonionic dispersant, 25-75 parts filler, and 10-50 parts solvent; By weight, component B includes: 0.4-1 parts of phenol-modified graphene, 19-60 parts of curing agent, and 38-80 parts of solvent; The epoxy resin includes phenolic epoxy resin and bisphenol A epoxy resin; the phenol-modified graphene includes graphene oxide and phenolic substances formed on the graphene oxide; The mass ratio of component A to component B is 3-10:1.

[0008] A third aspect of this invention provides a method for preparing the wear-resistant and anti-corrosion coating of this invention, the method comprising: (1) After mixing the filler, nonionic dispersant and solvent, the mixture is sheared for the first time, epoxy resin is added, and then the mixture is ground and sheared for the second time to obtain component A; (2) After mixing the curing agent, phenol-modified graphene and solvent, the third shear was performed to obtain component B; (3) Mix component A and component B according to the mass ratio.

[0009] A fourth aspect of the present invention provides a wear-resistant and corrosion-resistant coating, which is formed by coating the wear-resistant and corrosion-resistant paint described in the present invention.

[0010] The fifth aspect of this invention provides the application of the wear-resistant and corrosion-resistant materials, wear-resistant and corrosion-resistant coatings, and wear-resistant and corrosion-resistant coatings described herein in oilfield downhole drilling tools, downhole tubing, and downhole casing.

[0011] Through the above technical solution, the wear-resistant and anti-corrosion coating of the present invention has the advantages of good stability, good brushing performance, and simple construction process. The prepared coating has excellent wear resistance, good resistance to hydrogen sulfide and salt spray, strong adhesion, and good toughness.

[0012] The wear-resistant and anti-corrosion coating of this invention significantly improves wear resistance, resulting in a significantly reduced wear of the prepared coating. It rivals solid powder coatings and is significantly superior to traditional liquid coatings, ensuring the integrity of the coating under prolonged friction from downhole sand and slurry. Furthermore, the wear-resistant and anti-corrosion material of this invention exhibits excellent resistance to salt spray corrosion and hydrogen sulfide corrosion under working pressures greater than 8 MPa, solving the technical problem of traditional liquid coatings' inability to resist chemical corrosion under high pressure. On the other hand, the wear-resistant and anti-corrosion material of this invention addresses the insufficient high-temperature resistance of traditional oilfield anti-corrosion coatings, while overcoming the high brittleness of resins, improving coating adhesion, and ensuring the integrity of the coating under high deformation.

[0013] Furthermore, the wear-resistant and anti-corrosion coating of the present invention, by adding phenol-modified graphene, on the one hand, introduces graphene to extend the diffusion path of corrosive factors and improve the wear resistance of the coating product; on the other hand, phenol-modified graphene, as a macromolecular curing promoter, solves the problem of graphene dispersion in the liquid phase, and at the same time helps to solve the problem of gelation of curing agent after long-term storage, thus improving the storage performance of the coating. Detailed Implementation

[0014] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0015] The first aspect of the present invention provides a wear-resistant and corrosion-resistant material, the wear-resistant and corrosion-resistant material comprising a wear-resistant and corrosion-resistant coating, wherein the wear-resistant and corrosion-resistant coating comprises: epoxy resin, phenol-modified graphene, filler, nonionic dispersant and curing agent; The epoxy resin includes phenolic epoxy resin and bisphenol A epoxy resin; The phenol-modified graphene comprises graphene oxide and phenolic substances formed on the graphene oxide. The wear-resistant and corrosion-resistant material of this invention has the advantages of excellent wear resistance, resistance to hydrogen sulfide, and good salt spray resistance.

[0016] In this invention, the dosage of each component of the wear-resistant and anti-corrosion coating can be selected within a wide range. This is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the mass ratio of phenol-modified graphene, epoxy resin, filler, nonionic dispersant, and curing agent is 1:15-850:75-1850:1.5-125:20-150, more preferably 1:35-480:170-1000:5-45:40-100; more preferably, the mass ratio of phenol-modified graphene, epoxy resin, filler, nonionic dispersant, and curing agent is 1:100-250:150-650:10-30:50-80. Within the aforementioned range, the wear-resistant and anti-corrosion material has the advantages of excellent wear resistance, hydrogen sulfide resistance, and salt spray resistance.

[0017] In this invention, the wear-resistant and anti-corrosion coating has an abrasion rate of ≤50mg / 1000 rpm, for example, it can be 45 mg / 1000 rpm, 30 mg / 1000 rpm, 20 mg / 1000 rpm, 15 mg / 1000 rpm, 10 mg / 1000 rpm, or 5 mg / 1000 rpm. In a preferred embodiment of this invention, the wear-resistant and anti-corrosion coating has an abrasion rate of ≤15mg / 1000 rpm.

[0018] In this invention, the adhesion of the wear-resistant and corrosion-resistant coating can be selected from a wide range. According to a preferred embodiment of this invention, the adhesion of the coating is ≥8MPa, preferably 10-12 MPa.

[0019] In this invention, the thickness of the wear-resistant and corrosion-resistant coating can be selected from a wide range, which is illustrative but does not limit the scope of the invention. According to a preferred embodiment of the invention, the thickness is 80μm-300μm.

[0020] According to a preferred embodiment of the present invention, the wear-resistant and corrosion-resistant coating does not contain zinc powder.

[0021] In this invention, phenolic substances are formed on the graphene oxide through interactions (e.g., van der Waals forces, electrostatic interactions, hydrogen bonding), or adsorbed on the graphene oxide through interactions (e.g., van der Waals forces, electrostatic interactions, hydrogen bonding).

[0022] According to a preferred embodiment of the present invention, in the phenol-modified graphene, the phenolic substances are selected from one or more of phenol, aminophenol, methylphenol and tea polyphenols, preferably one or more of m-aminophenol, p-aminophenol, phenaminophenol, p-methylphenol, m-methylphenol, phenmethylphenol, tea polyphenols and phenol.

[0023] In this invention, the phenol content in the phenol-modified graphene can be selected from a wide range, which is illustrative but does not limit the scope of the invention. According to a preferred embodiment of the invention, the phenol content of the phenol-modified graphene is 2wt%-8wt% by mass.

[0024] In this invention, the carbon content in phenol-modified graphene can be selected from a wide range, which is illustrative but does not limit the scope of the invention. According to a preferred embodiment of the invention, the carbon content of phenol-modified graphene is 35wt%-60wt% by mass.

[0025] In this invention, the sheet diameter of phenol-modified graphene can be selected from a wide range. According to a preferred embodiment of this invention, the sheet diameter of phenol-modified graphene is 5μm-15μm, for example, 6μm, 8μm, 10μm, 12μm, and 14μm. In this invention, by adding phenol-modified graphene, on the one hand, the introduction of graphene extends the diffusion path of corrosive factors, improving the wear resistance of the coating product; on the other hand, phenol-modified graphene, as a macromolecular curing accelerator, solves the problem of graphene dispersion in the liquid phase, and at the same time helps to solve the problem of gelation of curing agent after long-term storage, thus improving the storage performance of the coating.

[0026] In this invention, phenolic substances are formed on the graphene oxide through van der Waals forces, electrostatic interactions, and hydrogen bonding. There are no particular limitations on the preparation method of the phenol-modified graphene. According to one embodiment of this invention, a method for preparing the phenol-modified graphene is provided, comprising: ultrasonically treating phenolic substances and graphene oxide in the presence of a solvent, followed by washing and drying to obtain phenol-modified graphene.

[0027] According to a preferred embodiment of the present invention, the carboxyl content on the graphene oxide is 3-10%.

[0028] According to a preferred embodiment of the present invention, the graphene oxide content is 0.2-2 wt% of the solvent.

[0029] According to a preferred embodiment of the present invention, the mass ratio of phenolic substances to graphene oxide is 15-30:1.

[0030] According to a preferred embodiment of the present invention, the solvent is selected from one or more of water, ethanol and methanol.

[0031] In this invention, the content of phenolic epoxy resin and bisphenol A epoxy resin in the epoxy resin can be selected within a wide range. According to a preferred embodiment of this invention, the mass ratio of phenolic epoxy resin to bisphenol A epoxy resin is 0.3-5:1, for example, 0.5:1, 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, 4:1, 4.5:1, preferably 1-3:1. The aforementioned mass ratio of phenolic epoxy resin to bisphenol A epoxy resin can overcome the defect of high brittleness of phenolic epoxy resin, improve the adhesion of the coating, ensure the integrity of the coating under high deformation, and solve the problem of insufficient high-temperature resistance of traditional oilfield anti-corrosion coatings.

[0032] In this invention, the range of nonionic dispersants is relatively wide, such as alcohols and polyethers. According to a preferred embodiment of this invention, the nonionic dispersant is 3,5,5-trimethyl-1-hexanol as the initiator, comprising a linear polyether with ethylene oxide and propylene oxide structural units. In the linear polyether, the starting end groups introduced into the polymer structure by the polyether initiator sequentially connect the ethylene oxide block and the propylene oxide block, and the other end of the polymer main chain is capped with a propylene oxide block and terminated with a hydroxyl group.

[0033] In this invention, the molar ratio of ethylene oxide structural units to propylene oxide structural units in the linear polyether can be selected within a wide range. According to a preferred embodiment of this invention, the molar ratio of ethylene oxide structural units to propylene oxide structural units is 1:1-1.1.

[0034] For example, the linear polyether has the structure shown in formula (I) or formula (II): Formula (I); Equation (II); In Equation (I) or Equation (II), the ratio of m to n is 1:1-1.1.

[0035] In this invention, the range of curing agents that can be selected is relatively wide. This is an illustrative example, but it does not limit the scope of this invention. According to a preferred embodiment of this invention, the curing agent is selected from one or more of phenolic amines, phenolic amides, and polyamides; more preferably, it is selected from one or more of cashew nut shell oil modified phenolic amines, cashew nut shell oil modified phenolic amides, and polyamides.

[0036] In this invention, the hydrogen equivalent of the curing agent can be selected from a wide range, which is illustrative but does not limit the scope of the invention. According to a preferred embodiment of the invention, the hydrogen equivalent of the curing agent is 120-200.

[0037] According to a preferred embodiment of the present invention, the filler includes flake filler and powder filler, which is beneficial to improving the wear resistance of the coating.

[0038] According to a preferred embodiment of the present invention, the sheet-like filler includes sheet-like mica, preferably graphene-modified sheet-like mica.

[0039] In this invention, the wear resistance of the wear-resistant and anti-corrosion coating is further improved by adding modified mica. The content of graphene and flake mica in the graphene-modified mica has a wide range of selectable values. According to a preferred embodiment of this invention, the mass ratio of graphene to flake mica is 0.1-2:100.

[0040] In this invention, the particle size of graphene-modified sheet mica can be selected over a wide range. According to a preferred embodiment of this invention, the median particle size of graphene-modified sheet mica is 10-25 μm.

[0041] In this invention, the range of types of powdered fillers is relatively wide. This is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the powdered filler is selected from one or more of aluminum tripolyphosphate, bentonite, talc, titanium dioxide, barium sulfate, carbon black, and calcium carbonate.

[0042] A second aspect of the present invention provides a wear-resistant and corrosion-resistant coating, the coating comprising component A and component B: By weight, component A comprises: 5-35 parts epoxy resin, 0.5-5 parts nonionic dispersant, 25-75 parts filler, and 10-50 parts solvent; By weight, component B includes: 0.4-1 parts of phenol-modified graphene, 19-60 parts of curing agent, and 38-80 parts of solvent; The epoxy resin includes phenolic epoxy resin and bisphenol A epoxy resin; the phenol-modified graphene includes graphene oxide and phenolic substances formed on the graphene oxide; the mass ratio of component A to component B is 3-10:1. The wear-resistant and anti-corrosion coating of this invention has advantages such as good stability, good brushing performance, and simple construction process. The prepared coating exhibits excellent wear resistance, good resistance to hydrogen sulfide and salt spray, strong adhesion, and good toughness.

[0043] According to a preferred embodiment of the present invention, the epoxy resin in component A of the wear-resistant and anti-corrosion coating is 7-30 parts by weight.

[0044] According to a preferred embodiment of the present invention, the nonionic dispersant in component A of the wear-resistant and anti-corrosion coating is 1-3 parts by weight.

[0045] According to a preferred embodiment of the present invention, the filler in component A of the wear-resistant and anti-corrosion coating is 34-63 parts by weight, and more preferably, the filler includes flaky mica and powdered filler.

[0046] In this invention, the amount of sheet filler and powder filler can be selected from a wide range. According to a preferred embodiment of this invention, the amount of sheet filler is 2-10 parts, more preferably 4-8 parts, and the amount of powder filler is 25-65 parts, more preferably 30-55 parts, which further improves the wear resistance of the wear-resistant and anti-corrosion coating.

[0047] According to a preferred embodiment of the present invention, the phenol-modified graphene in component B of the wear-resistant and anti-corrosion coating is 0.5-0.8 parts by weight.

[0048] According to a preferred embodiment of the present invention, the curing agent in component B of the wear-resistant and anti-corrosion coating is 30-50 parts by weight.

[0049] According to a preferred embodiment of the present invention, in the wear-resistant and anti-corrosion coating, the mass ratio of component A to component B is 4-8:1.

[0050] In this invention, the phenolic substances in the phenol-modified graphene are formed on the graphene oxide through van der Waals forces, electrostatic interactions, and hydrogen bonding.

[0051] According to a preferred embodiment of the present invention, in the phenol-modified graphene, the phenolic substances are selected from one or more of phenol, aminophenol, methylphenol and tea polyphenols, preferably one or more of m-aminophenol, p-aminophenol, phenaminophenol, p-methylphenol, m-methylphenol, phenmethylphenol, tea polyphenols and phenol.

[0052] In this invention, the phenol content in the phenol-modified graphene can be selected from a wide range, which is illustrative but does not limit the scope of the invention. According to a preferred embodiment of the invention, the phenol content of the phenol-modified graphene is 2wt%-8wt% by mass.

[0053] In this invention, the carbon content in phenol-modified graphene can be selected from a wide range, which is illustrative but does not limit the scope of the invention. According to a preferred embodiment of the invention, the carbon content of phenol-modified graphene is 35wt%-60wt% by mass.

[0054] In this invention, the sheet size of phenol-modified graphene can be selected over a wide range. According to a preferred embodiment of this invention, based on the median particle size, the sheet size of phenol-modified graphene is 5μm-15μm, for example, 6μm, 8μm, 10μm, 12μm, and 14μm. In this invention, by adding phenol-modified graphene, on the one hand, the introduction of graphene extends the diffusion path of corrosive agents, improving the wear resistance of the coating product; on the other hand, phenol-modified graphene, as a macromolecular curing accelerator, solves the problem of graphene dispersion in the liquid phase, and also helps to solve the problem of gelation of the curing agent after long-term storage, thus improving the storage performance of the coating.

[0055] In this invention, the content of phenolic epoxy resin and bisphenol A epoxy resin in the epoxy resin can be selected within a wide range. According to a preferred embodiment of this invention, the mass ratio of phenolic epoxy resin to bisphenol A epoxy resin is 0.3-5:1, for example, 0.5:1, 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, 4:1, 4.5:1, preferably 1-3:1. The aforementioned mass ratio of phenolic epoxy resin to bisphenol A epoxy resin can overcome the defect of high brittleness of phenolic epoxy resin, improve the adhesion of the coating, ensure the integrity of the coating under high deformation, and solve the problem of insufficient high-temperature resistance of traditional oilfield anti-corrosion coatings.

[0056] In this invention, the range of nonionic dispersants is relatively wide, such as alcohols and polyethers. According to a preferred embodiment of this invention, the nonionic dispersant is 3,5,5-trimethyl-1-hexanol as the initiator. The linear polyether includes ethylene oxide structural units and propylene oxide structural units. In the linear polyether, the starting end group of the polymer structure is introduced by the polyether initiator, which sequentially connects the ethylene oxide block and the propylene oxide block. The other end of the polymer main chain is capped with a propylene oxide block and the end is a hydroxyl group.

[0057] In this invention, the molar ratio of ethylene oxide structural units to propylene oxide structural units in the linear polyether can be selected within a wide range. According to a preferred embodiment of this invention, the molar ratio of ethylene oxide structural units to propylene oxide structural units is 1:1-1.1.

[0058] For example, the linear polyether has the structure shown in formula (I) or formula (II): Formula (I); Equation (II); In Equation (I) or Equation (II), the ratio of m to n is 1:1-1.1.

[0059] In this invention, the range of curing agents that can be selected is relatively wide. This is an illustrative example, but it does not limit the scope of this invention. According to a preferred embodiment of this invention, the curing agent is selected from one or more of phenolic amines, phenolic amides, and polyamides; more preferably, it is selected from one or more of cashew nut shell oil modified phenolic amines, cashew nut shell oil modified phenolic amides, and polyamides.

[0060] In this invention, the hydrogen equivalent of the curing agent can be selected from a wide range, which is illustrative but does not limit the scope of the invention. According to a preferred embodiment of the invention, the hydrogen equivalent of the curing agent is 120-200.

[0061] According to a preferred embodiment of the present invention, the filler in the coating includes flake filler and powder filler, which is beneficial to improving the wear resistance of the coating.

[0062] According to a preferred embodiment of the present invention, the sheet-like filler includes sheet-like mica, preferably graphene-modified sheet-like mica.

[0063] In this invention, the wear resistance of the wear-resistant and anti-corrosion coating is improved by adding modified mica. The content of graphene and flake mica in the graphene-modified mica has a wide range of selectable values. According to a preferred embodiment of this invention, the mass ratio of graphene to flake mica is 0.1-2:100.

[0064] In this invention, the particle size of graphene-modified sheet mica can be selected over a wide range. According to a preferred embodiment of this invention, the median particle size of graphene-modified sheet mica is 10-25 μm.

[0065] In this invention, the range of types of powdered fillers is relatively wide. This is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the powdered filler is selected from one or more of aluminum tripolyphosphate, bentonite, talc, titanium dioxide, barium sulfate, carbon black, and calcium carbonate.

[0066] In this invention, the range of solvents that can be selected is relatively wide. This is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the solvent is selected from one or more of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, butanone, methyl isobutyl ketone, propylene glycol methyl ether, diethylene glycol ethyl ether acetate, diethylene glycol monobutyl ether, diethylene glycol butyl ether acetate, and ethyl acetate.

[0067] According to a preferred embodiment of the present invention, the solvent is a mixed solution of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether. More preferably, the volume ratio of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether is 1:1-5:0.3-2:1-5:3-10.

[0068] A third aspect of this invention provides a method for preparing the wear-resistant and anti-corrosion coating of this invention, the method comprising: (1) After mixing the filler, nonionic dispersant and solvent, the mixture is sheared for the first time, epoxy resin is added, and then the mixture is ground and sheared for the second time to obtain component A; (2) After mixing the curing agent, phenol-modified graphene and solvent, the third shear was performed to obtain component B; (3) Mix component A and component B according to the mass ratio; According to a preferred embodiment of the present invention, the method for preparing the wear-resistant and anti-corrosion coating includes: (1) After mixing powdered filler, nonionic dispersant and solvent, the mixture is sheared for the first time, epoxy resin is added and then ground, and after mixing with sheet filler, the mixture is sheared for the second time to obtain component A; (2) After mixing the curing agent, phenol-modified graphene and solvent, the third shear was performed to obtain component B; (3) Mix component A and component B according to the mass ratio. The wear-resistant and anti-corrosion coating prepared by the method of the present invention has the advantages of good stability, good brushing performance, and simple construction process. The prepared coating has excellent wear resistance, good acid / alkali resistance, strong adhesion, and good toughness.

[0069] In this invention, the first shearing condition is not particularly limited; conventional shearing conditions in the art are sufficient. This is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the first shearing condition includes: a temperature of 30°C-50°C; a rotation speed of 800 rpm-2000 rpm; and a time that can be determined according to the actual situation, generally 30-60 minutes.

[0070] In this invention, the grinding conditions are not particularly limited, and conventional grinding conditions in the art are sufficient. This is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the grinding conditions include: grinding to a fineness ≤25μm; a rotation speed of 600-3000rpm; and a time that can be determined according to the actual situation, generally 30-180min.

[0071] In this invention, the second shearing condition is not particularly limited; conventional shearing conditions in the art are sufficient. This is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the second shearing condition includes: a rotational speed of 800 rpm to 1300 rpm; and a time that can be determined according to the actual situation, generally 20 to 30 minutes.

[0072] In this invention, the third shearing condition is not particularly limited; conventional shearing conditions in the art are sufficient. This is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the second shearing condition includes: a rotational speed of 800 rpm to 1200 rpm; and a time that can be determined according to the actual situation, generally 10-30 minutes.

[0073] A fourth aspect of the present invention provides a wear-resistant and corrosion-resistant coating, which is formed by coating the wear-resistant and corrosion-resistant paint described in the present invention.

[0074] In this invention, the coating method is not particularly limited, and any conventional coating method in the art is acceptable, such as spraying, roller coating or dip coating.

[0075] The fifth aspect of this invention provides the application of the wear-resistant and corrosion-resistant materials, wear-resistant and corrosion-resistant coatings, and wear-resistant and corrosion-resistant coatings described herein in oilfield downhole drilling tools, downhole tubing, and downhole casing.

[0076] In the context and embodiments of this invention, the cleaning process is performed in accordance with GB / T8923.1-2011 before the paint film is applied.

[0077] In the context and embodiments of this invention, the wear loss of wear-resistant and corrosion-resistant materials and coatings is tested using a Taber wear tester, according to ASTM D4060, which measures the coating mass loss after a 1kg standard wear wheel rotates 1000 times.

[0078] In the context and embodiments of this invention, the hydrogen sulfide corrosion resistance test of wear-resistant and corrosion-resistant materials and wear-resistant and corrosion-resistant coatings is conducted in accordance with GB / T4157-2017, the salt spray test is conducted in accordance with GB / T1771-2007, and the paint film adhesion test is conducted in accordance with GB / T5210-2006.

[0079] To further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the scope of the claims of the present invention.

[0080] In the following examples, the hydrogen equivalent of cashew nut shell oil modified phenolic amide (LITE-3100) is 150; the hydrogen equivalent of cashew phenol modified phenolic amine (WSCM-1101) is 130; and the hydrogen equivalent of polyamide (Versamid115) is 198.

[0081] In the following examples, the median particle size of the graphene-modified sheet mica is 16 μm.

[0082] In the following embodiments, the paint film was applied using a two-coat spraying process with a spraying pressure of 0.6 MPa, an interval of 2 hours between the two sprays, and a paint film thickness of 250 μm.

[0083] Example 1 (1) Take 2 parts of nonionic dispersant (structural formula as shown in formula (I), where m=15, n=16), 5 parts of titanium dioxide, 8 parts of talc, 2 parts of aluminum tripolyphosphate, 15 parts of barium sulfate, 20 parts of calcium carbonate, and 22 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, and diethylene glycol monobutyl ether, in a volume ratio of 1:2:0.8:3:5), add them to a high-speed shear mixer, adjust the speed to 1200 rpm, shear and disperse for 30 min, control the shear temperature to 40℃, until all solids are evenly dispersed and no stratification occurs; add 20 parts of epoxy resin (15 parts of phenolic epoxy resin and 5 parts of bisphenol A epoxy resin), mechanically stir, transfer to a sand mill, grind at 700 rpm for 30 min, until the fineness is ≤25μm. Add 6 parts of graphene-modified sheet mica (graphene:mica = 1:100) and shear and disperse at 1200 rpm for 20 min to obtain component A.

[0084] (2) Take 45 parts of cashew shell oil modified phenolic amide curing agent (LITE-3117), 0.7 parts of p-methylphenol modified graphene (carbon content 50wt%, phenol content 6wt%, sheet diameter 12μm) and 54.3 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether, volume ratio 1:2:0.8:3:5), and shear at 1000rpm for 15min to obtain component B.

[0085] (3) Mix component A obtained in step (1) and component B obtained in step (2) at a mass ratio of 5:1 until uniform. The solid content of the coating is 71.91%.

[0086] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and wear loss were tested using the aforementioned standards.

[0087] The results showed that the adhesion of the wear-resistant and anti-corrosion coating was 12 MPa. After immersion in hydrogen sulfide solution for 1000 hours, blistering and peeling began to appear on the substrate surface. After 3000 hours of neutral salt spray testing, corrosion at the scribing points began to spread to both sides. The wear loss test results showed that the wear loss was 8 mg / 1000 revolutions.

[0088] Example 2 The implementation method is the same as in Example 1, except that equal parts of sheet mica are used to replace graphene-modified sheet mica, and the other conditions are the same as in Example 1.

[0089] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and wear loss were tested using the aforementioned standards.

[0090] The results showed that the adhesion of the wear-resistant and anti-corrosion coating was 10 MPa. After immersion in hydrogen sulfide solution for 900 hours, blistering and peeling began to appear on the substrate surface. After 1800 hours of neutral salt spray testing, corrosion at the scribing points began to spread to both sides. The wear loss test results showed that the wear loss was 45 mg / 1000 revolutions.

[0091] Example 3 The implementation method is the same as in Example 1, except that the epoxy resin is 20 parts (5 parts of phenolic epoxy resin and 15 parts of bisphenol A type epoxy resin), and the other conditions are the same as in Example 1.

[0092] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and abrasion loss were tested using the aforementioned standards. Results showed that the adhesion of the wear-resistant and anti-corrosion coating was 8 MPa. After immersion in hydrogen sulfide solution for 950 hours, blistering and peeling began to appear on the substrate surface. After 2300 hours of neutral salt spray testing, corrosion at the scribe lines began to spread laterally. The abrasion loss test results showed an abrasion loss of 25 mg / 1000 revolutions.

[0093] Example 4 (1) Take 2 parts of nonionic dispersant (structural formula as shown in formula (I), where m=15, n=16), 5 parts of titanium dioxide, 8 parts of talc, 2 parts of aluminum tripolyphosphate, 15 parts of barium sulfate, 20 parts of calcium carbonate, and 10 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, and diethylene glycol monobutyl ether, in a volume ratio of 1:2:0.8:3:5), add them to a high-speed shear mixer, adjust the speed to 1200 rpm, shear and disperse for 30 min, control the shear temperature to 40℃, until all solids are evenly dispersed and no stratification occurs; add 32 parts of epoxy resin (24 parts of phenolic epoxy resin and 8 parts of bisphenol A epoxy resin), mechanically stir, transfer to a sand mill, grind at 700 rpm for 30 min, until the fineness is ≤25μm. Add 6 parts of graphene-modified sheet mica (graphene:mica = 1:100) and shear and disperse at 1200 rpm for 20 min to obtain component A.

[0094] (2) Take 45 parts of cashew shell oil modified phenolic amide curing agent (LITE-3117), 0.7 parts of p-methylphenol modified graphene (carbon content 50wt%, phenol content 6wt%, sheet diameter 12μm) and 54.3 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether, volume ratio 1:2:0.8:3:5), and shear at 1000rpm for 15min to obtain component B.

[0095] (3) Mix component A obtained in step (1) and component B obtained in step (2) at a mass ratio of 5:1 until uniform. The solid content of the coating is 82.62%.

[0096] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and abrasion loss were tested using the aforementioned standards. Results showed that the adhesion of the wear-resistant and anti-corrosion coating was 8 MPa. After immersion in hydrogen sulfide solution for 880 hours, blistering and peeling began to appear on the substrate surface. After 2000 hours of neutral salt spray testing, corrosion at the scribe lines began to spread laterally. The abrasion loss test results showed an abrasion loss of 21 mg / 1000 revolutions.

[0097] Example 5 (1) Take 2 parts of nonionic dispersant (structural formula as shown in formula (I), where m=15, n=16), 5 parts of titanium dioxide, 8 parts of talc, 2 parts of aluminum tripolyphosphate, 5 parts of barium sulfate, 5 parts of calcium carbonate, and 47 parts of solvent (a mixture of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, and diethylene glycol monobutyl ether, in a volume ratio of 1:2:0.8:3:5), add them to a high-speed shear mixer, adjust the speed to 1200 rpm, shear and disperse for 30 min, control the shear temperature to 40℃, until all solids are evenly dispersed and no stratification occurs; add 20 parts of epoxy resin (15 parts of phenolic epoxy resin and 5 parts of bisphenol A epoxy resin), mechanically stir, transfer to a sand mill, grind at 700 rpm for 30 min, until the fineness is ≤25μm. Add 6 parts of graphene-modified sheet mica (graphene:mica = 1:100) and shear and disperse at 1200 rpm for 20 min to obtain component A.

[0098] (2) Take 45 parts of cashew shell oil modified phenolic amide curing agent (LITE-3117), 0.7 parts of p-methylphenol modified graphene (carbon content 50wt%, phenol content 6wt%, sheet diameter 12μm) and 54.3 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether, volume ratio 1:2:0.8:3:5), and shear at 1000rpm for 15min to obtain component B.

[0099] (3) Mix component A obtained in step (1) and component B obtained in step (2) at a mass ratio of 5:1 until uniform, and the solid content of the coating is 51.78%.

[0100] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and abrasion loss were tested using the aforementioned standards. Results showed that the adhesion of the wear-resistant and anti-corrosion coating was 10 MPa. After immersion in hydrogen sulfide solution for 930 hours, blistering and peeling began to appear on the substrate surface. After 2500 hours of neutral salt spray testing, corrosion at the scribe lines began to spread to both sides. The abrasion loss test results showed an abrasion loss of 42 mg / 1000 revolutions.

[0101] Example 6 (1) Take 2 parts of nonionic dispersant (structural formula as shown in formula (I), where m=15, n=16), 5 parts of titanium dioxide, 8 parts of talc, 2 parts of aluminum tripolyphosphate, 15 parts of barium sulfate, 20 parts of calcium carbonate, and 22 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, and diethylene glycol monobutyl ether, in a volume ratio of 1:2:0.8:3:5), add them to a high-speed shear mixer, adjust the speed to 1200 rpm, shear and disperse for 30 min, control the shear temperature to 40℃, until all solids are evenly dispersed and no stratification occurs; add 20 parts of epoxy resin (15 parts of phenolic epoxy resin and 5 parts of bisphenol A epoxy resin), mechanically stir, transfer to a sand mill, grind at 700 rpm for 30 min, until the fineness is ≤25μm. Add 6 parts of graphene-modified sheet mica (graphene:mica = 1:100) and shear and disperse at 1200 rpm for 20 min to obtain component A.

[0102] (2) Take 45 parts of cashew shell oil modified phenolic amide curing agent (LITE-3117), 0.7 parts of p-methylphenol modified graphene (carbon content 50wt%, phenol content 6wt%, sheet diameter 12μm) and 54.3 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether, volume ratio 1:2:0.8:3:5), and shear at 1000rpm for 15min to obtain component B.

[0103] (3) Mix component A obtained in step (1) and component B obtained in step (2) at a mass ratio of 3.5:1 until uniform, and the solid content of the coating is 70.82%.

[0104] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and abrasion loss were tested using the aforementioned standard. Results showed that the adhesion of the wear-resistant and anti-corrosion coating was 10 MPa. After immersion in hydrogen sulfide solution for 910 hours, blistering and peeling began to appear on the substrate surface. After 2750 hours of neutral salt spray testing, corrosion at the scribe lines began to spread to both sides. The abrasion loss test results showed an abrasion loss of 36 mg / 1000 revolutions.

[0105] Example 7 (1) Take 2 parts of nonionic dispersant (structural formula as shown in formula (I), where m=15, n=16), 5 parts of titanium dioxide, 8 parts of talc, 2 parts of aluminum tripolyphosphate, 15 parts of barium sulfate, 20 parts of calcium carbonate, and 22 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, and diethylene glycol monobutyl ether, in a volume ratio of 1:2:0.8:3:5), add them to a high-speed shear mixer, adjust the speed to 1200 rpm, shear and disperse for 30 min, control the shear temperature to 40℃, until all solids are evenly dispersed and no stratification occurs; add 20 parts of epoxy resin (15 parts of phenolic epoxy resin and 5 parts of bisphenol A epoxy resin), mechanically stir, transfer to a sand mill, grind at 700 rpm for 30 min, until the fineness is ≤25μm. Add 6 parts of graphene-modified sheet mica (graphene:mica = 1:100) and shear and disperse at 1200 rpm for 20 min to obtain component A.

[0106] (2) Take 45 parts of cashew shell oil modified phenolic amide curing agent (LITE-3117), 0.4 parts of p-methylphenol modified graphene (carbon content 50wt%, phenol content 6wt%, sheet diameter 12μm) and 54.6 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether, volume ratio 1:2:0.8:3:5), and shear at 1000rpm for 15min to obtain component B.

[0107] (3) Mix component A obtained in step (1) and component B obtained in step (2) at a mass ratio of 5:1 until uniform, and the solid content of the coating is 71.86%.

[0108] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and abrasion loss were tested using the aforementioned standards. Results showed that the adhesion of the wear-resistant and anti-corrosion coating was 9 MPa. After immersion in hydrogen sulfide solution for 900 hours, blistering and peeling began to appear on the substrate surface. After 2660 hours of neutral salt spray testing, corrosion at the scribe lines began to spread laterally. The abrasion loss test results showed an abrasion loss of 30 mg / 1000 revolutions.

[0109] Example 8 Take 2.8 parts of nonionic dispersant (structural formula as shown in formula (II), where m=18, n=18), 6 parts of titanium dioxide, 10 parts of talc, 4 parts of bentonite, 15 parts of barium sulfate, 10 parts of carbon black, 10 parts of calcium carbonate, and 15.2 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, and diethylene glycol monobutyl ether, in a volume ratio of 1:3:1:2.5:7), add them to a high-speed shear mixer, adjust the speed to 2000 rpm, shear and disperse for 50 min, control the shear temperature to 45℃, until all solids are evenly dispersed and no stratification occurs; add 23 parts of epoxy resin (16 parts of phenolic epoxy resin and 7 parts of bisphenol A epoxy resin), mechanically stir, transfer to a sand mill, grind at 1000 rpm for 50 min, until the fineness is ≤25μm. Four parts of graphene-modified sheet mica (graphene:mica = 1.5:100) were added and sheared and dispersed at 1000 rpm for 30 min to obtain component A.

[0110] (2) Take 43 parts of cashew phenol modified phenolic amine curing agent (WSCM-1101), 0.8 parts of p-aminophenol modified graphene (carbon content 60wt%, phenol content 2wt%, sheet diameter 12μm) and 56.2 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether, volume ratio 1:3:1:2.5:7), and shear at 1000rpm for 15min to obtain component B.

[0111] (3) Mix component A obtained in step (1) and component B obtained in step (2) at a mass ratio of 6:1 until uniform, and the solid content of the coating is 78.94%.

[0112] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and abrasion loss were tested using the aforementioned standards. The results showed that the adhesion of the wear-resistant and anti-corrosion coating was 12 MPa. After immersion in hydrogen sulfide solution for 980 hours, blistering and peeling began to appear on the substrate surface. After 2800 hours of neutral salt spray testing, corrosion at the scribe lines began to spread to both sides. The abrasion loss test results showed an abrasion loss of 15 mg / 1000 revolutions.

[0113] Example 9 (1) Take 1.5 parts of nonionic dispersant (structural formula as shown in formula (I), where m=14, n=14), 3 parts of titanium dioxide, 5 parts of talc, 10 parts of barium sulfate, 2 parts of aluminum tripolyphosphate, 5 parts of calcium carbonate, 5 parts of carbon black, and 22 parts of solvent (a mixture of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, and diethylene glycol monobutyl ether, in a volume ratio of 1:3:1.8:4:7), add them to a high-speed shear mixer, adjust the speed to 800 rpm, shear and disperse for 50 min, control the shear temperature to 40℃, until all solids are evenly dispersed and no stratification occurs; add 18 parts of epoxy resin (13 parts of phenolic epoxy resin and 5 parts of bisphenol A epoxy resin), mechanically stir, transfer to a sand mill, grind at 1200 rpm for 30 min, until the fineness is ≤25μm. Seven parts of graphene-modified sheet mica (graphene:mica = 0.5:100) were added and sheared and dispersed at 1200 rpm for 20 min to obtain component A.

[0114] (2) Take 45 parts of polyamide curing agent (Versamid115), 0.6 parts of tea polyphenol modified graphene (carbon content 40wt%, phenol content 8wt%, sheet diameter 12μm) and 54.4 parts of solvent (a mixed solvent of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate and diethylene glycol monobutyl ether, volume ratio 1:3:1.8:4:7), and shear at 800rpm for 25min to obtain component B.

[0115] (3) Mix component A obtained in step (1) and component B obtained in step (2) at a mass ratio of 7:1 until uniform, and the solid content of the coating is 67.91%.

[0116] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and abrasion loss were tested using the aforementioned standards. Results showed that the adhesion of the wear-resistant and anti-corrosion coating was 12 MPa. After immersion in hydrogen sulfide solution for 900 hours, blistering and peeling began to appear on the substrate surface. After 2850 hours of neutral salt spray testing, corrosion at the scribe lines began to spread laterally. The abrasion loss test results showed an abrasion loss of 15 mg / 1000 revolutions.

[0117] Example 10 The implementation method is the same as in Example 1, except that in step 1, an equal amount of mica powder is used to replace the graphene-modified mica sheets, and the other conditions are the same as in Example 1.

[0118] A wear-resistant and anti-corrosion coating was prepared by spraying a pre-treated carbon steel substrate. The coating's film adhesion, resistance to neutral salt spray, resistance to hydrogen sulfide, and abrasion loss were tested using the aforementioned standards. Results showed that the adhesion of the wear-resistant and anti-corrosion coating was 9 MPa. After immersion in hydrogen sulfide solution for 850 hours, blistering and peeling began to appear on the substrate surface. After 1600 hours of neutral salt spray testing, corrosion at the scribe lines began to spread laterally. The abrasion loss test results showed an abrasion loss of 50 mg / 1000 revolutions.

[0119] Comparative Example 1 The implementation method is the same as in Example 1, except that the epoxy resin is 20 parts of bisphenol A type epoxy resin, and the other conditions are the same as in Example 1.

[0120] The results showed that the adhesion of the wear-resistant and anti-corrosion coating was 10 MPa. After immersion in hydrogen sulfide solution for 700 hours, blistering and peeling began to appear on the substrate surface. After 1420 hours of neutral salt spray testing, corrosion at the scribing points began to spread to both sides. The wear loss test results showed that the wear loss was 118 mg / 1000 revolutions.

[0121] Comparative Example 2 The implementation method is the same as in Example 1, except that TEGO-752W (anionic dispersant) is used instead of nonionic dispersant, and the other conditions are the same as in Example 1.

[0122] The results showed that the adhesion of the wear-resistant and anti-corrosion coating was 7 MPa. After immersion in hydrogen sulfide solution for 300 hours, blistering and peeling began to appear on the substrate surface. After 400 hours of neutral salt spray testing, corrosion at the scribing points began to spread to both sides. The wear loss test results showed that the wear loss was 200 mg / 1000 revolutions.

[0123] Comparative Example 3 The implementation method is the same as in Example 1, except that in step 2, graphene is used instead of phenol-modified graphene, and the other conditions are the same as in Example 1.

[0124] The results showed that the adhesion of the wear-resistant and anti-corrosion coating was 6 MPa. After immersion in hydrogen sulfide solution for 220 hours, blistering and peeling began to appear on the substrate surface. After 500 hours of neutral salt spray testing, corrosion at the scribing points began to spread to both sides. The wear loss test results showed that the wear loss was 261 mg / 1000 revolutions.

[0125] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A wear resistant anticorrosive material, characterized by, The wear-resistant and corrosion-resistant material includes a wear-resistant and corrosion-resistant coating, the composition of which includes: epoxy resin, phenol-modified graphene, filler, nonionic dispersant and curing agent; The epoxy resin includes phenolic epoxy resin and bisphenol A epoxy resin; The phenol-modified graphene includes graphene oxide and phenolic substances formed on the graphene oxide.

2. The wear-resistant and corrosion-resistant material according to claim 1, wherein, The mass ratio of phenol-modified graphene, epoxy resin, filler, nonionic dispersant, and curing agent is 1:15-850:75-1850:1.5-125:20-150; preferably 1:35-480:100-1000:5-45:40-100; more preferably 1:100-250:150-650:10-30:50-80; and / or The wear-resistant and corrosion-resistant coating has an abrasion loss ≤50mg / 1000 revolutions, preferably ≤15mg / 1000 revolutions; and / or The adhesion of the wear-resistant and corrosion-resistant coating is ≥8MPa, preferably 10-12MPa; and / or The thickness of the wear-resistant and corrosion-resistant coating is 80μm-300μm; and / or The wear-resistant and corrosion-resistant coating does not contain zinc powder.

3. The wear-resistant and corrosion-resistant material according to claim 1 or 2, wherein, In the phenol-modified graphene, the phenolic substances are selected from one or more of phenol, aminophenol, methylphenol, and tea polyphenols, preferably one or more of m-aminophenol, p-aminophenol, anthranilin, p-methylphenol, m-methylphenol, anthranilin, tea polyphenols, and phenol; and / or The phenol-modified graphene contains 2wt%-8wt% phenol; and / or The phenol-modified graphene contains 35wt%-60wt% carbon; and / or The phenol-modified graphene has a sheet diameter of 5μm-15μm.

4. The wear-resistant and corrosion-resistant material according to any one of claims 1-3, wherein, In the epoxy resin, the mass ratio of phenolic epoxy resin to bisphenol A type epoxy resin is 0.3-5:1, preferably 1-3:1; and / or The nonionic dispersing agent is a linear polyether comprising ethylene oxide and propylene oxide structural units, with 3,5,5-trimethyl-1-hexanol as the initiator; preferably, the molar ratio of ethylene oxide to propylene oxide structural units in the linear polyether is 1:1-1.1; and / or The curing agent is selected from one or more of phenolic amines, phenolic amides, and polyamides; preferably one or more of cashew nut shell oil-modified phenolic amines, cashew nut shell oil-modified phenolic amides, and polyamides; and / or the hydrogen equivalent of the curing agent is 120-200; and / or The packing includes sheet packing and powder packing; Preferably, The sheet-like filler includes sheet-like mica, more preferably graphene-modified sheet-like mica; More preferably, the mass ratio of graphene to flake mica in the graphene-modified flake mica is 0.1-2:100; and / or the median particle size of the graphene-modified flake mica is 10-25 μm; and / or The powdered filler is selected from one or more of aluminum tripolyphosphate, bentonite, talc, titanium dioxide, barium sulfate, carbon black, and calcium carbonate.

5. A wear-resistant and corrosion-resistant coating, characterized in that, The coating consists of component A and component B: By weight, component A comprises: 5-35 parts epoxy resin, 0.5-5 parts nonionic dispersant, 25-75 parts filler, and 10-50 parts solvent; By weight, component B includes: 0.4-1 parts of phenol-modified graphene, 19-60 parts of curing agent, and 38-80 parts of solvent; The epoxy resin includes phenolic epoxy resin and bisphenol A epoxy resin; the phenol-modified graphene includes graphene oxide and phenolic substances formed on the graphene oxide; The mass ratio of component A to component B is 3-10:

1.

6. The coating according to claim 5, wherein, In coatings, Component A, by weight, comprises: 7-30 parts epoxy resin; and / or 1-3 parts of nonionic dispersant; and / or 34-63 parts of filler; and / or Component B, by weight, comprises: 0.5-0.8 parts of phenol-modified graphene; and / or 30-50 parts of curing agent; and / or The mass ratio of component A to component B is 4-8:1; Preferably, the packing includes sheet packing and powdered packing, wherein the sheet packing is 2-10 parts, preferably 4-8 parts, and the powdered packing is 25-65 parts, preferably 30-55 parts.

7. The coating according to claim 5 or 6, wherein, In the phenol-modified graphene, the phenolic substances are selected from one or more of phenol, aminophenol, methylphenol, and tea polyphenols, preferably one or more of m-aminophenol, p-aminophenol, anthranilin, p-methylphenol, m-methylphenol, anthranilin, tea polyphenols, and phenol; and / or The phenol-modified graphene contains 2wt%-8wt% phenol; and / or The phenol-modified graphene contains 35wt%-60wt% carbon; and / or The phenol-modified graphene has a sheet diameter of 5 μm-15 μm; and / or In the epoxy resin, the mass ratio of phenolic epoxy resin to bisphenol A type epoxy resin is 0.3-5:1, preferably 1-3:1; and / or The nonionic dispersant is a linear polyether comprising ethylene oxide and propylene oxide structural units, with 3,5,5-trimethyl-1-hexanol as the initiator; preferably, the molar ratio of ethylene oxide to propylene oxide structural units in the linear polyether is 1:1-1.1; and / or The curing agent for the wear-resistant and corrosion-resistant coating is selected from one or more of phenolic amines, phenolic amides, and polyamides; preferably, it is selected from one or more of cashew nut shell oil-modified phenolic amines, cashew nut shell oil-modified phenolic amides, and polyamides; and / or the hydrogen equivalent of the curing agent is 120-200; and / or The sheet-like filler is sheet-like mica, more preferably graphene-modified sheet-like mica; More preferably, the mass ratio of graphene to flake mica in graphene-modified mica is 0.1-2:100; and / or The median particle size of the graphene-modified flake mica is 10-25 μm; and / or The powdered filler is selected from one or more of aluminum tripolyphosphate, bentonite, talc, titanium dioxide, barium sulfate, carbon black, and calcium carbonate; and / or The solvent is selected from one or more of toluene, xylene, n-butyl acetate, propylene glycol methyl ether acetate, butanone, methyl isobutyl ketone, propylene glycol methyl ether, diethylene glycol ethyl ether acetate, diethylene glycol monobutyl ether, diethylene glycol butyl ether acetate, and ethyl acetate.

8. The method for preparing the wear-resistant and anti-corrosion coating according to any one of claims 5-7, characterized in that, The method includes: (1) After mixing the filler, nonionic dispersant and solvent, the mixture is sheared for the first time, epoxy resin is added, and then the mixture is ground and sheared for the second time to obtain component A; (2) After mixing the curing agent, phenol-modified graphene and solvent, the third shear was performed to obtain component B; (3) Mix component A and component B according to the mass ratio; Preferably, the method includes: (1) mixing powdered filler, nonionic dispersant and solvent and then performing a first shear, adding epoxy resin and grinding, adding sheet filler and mixing and then performing a second shear to obtain component A; (2) After mixing the curing agent, phenol-modified graphene and solvent, the third shear was performed to obtain component B; (3) Mix component A and component B according to the mass ratio.

9. A wear-resistant and corrosion-resistant coating, characterized in that, Formed by coating with the wear-resistant and corrosion-resistant coating as described in any one of claims 5-7.

10. The application of the wear-resistant and corrosion-resistant material according to any one of claims 1-4, the wear-resistant and corrosion-resistant coating according to any one of claims 5-7, and the wear-resistant and corrosion-resistant coating according to claim 9 in oilfield downhole drilling tools, downhole tubing, and downhole casing.