Composite bonding type anti-corrosion belt as well as preparation method and anti-corrosion method thereof

Abstract

The invention discloses a composite bonding type anti-corrosion belt, a preparation method of the composite bonding type anti-corrosion belt and an anti-corrosion method of the composite bonding type anti-corrosion belt, and the composite bonding type anti-corrosion belt comprises the composite bonding type anti-corrosion belt and a quick film forming agent, the composite bonding type anti-corrosion belt comprises the following components in parts by weight: polyester non-woven fabric, linseed oil, mineral grease, a polymer composite corrosion inhibitor, a lubricating agent, a mildew preventive, a thickening agent, a curing agent, a filling agent and tannic acid. The quick film forming agent comprises the following components in parts by weight: an isocyanate prepolymer, amine-terminated polyether, a chain extender, fumed silica, a dispersing agent, a defoaming agent and color paste. Through multiple modification means, the problems that other coating technologies are complex in construction, single in appearance color, prone to being damaged during treading, incapable of being soaked in water, prone to breeding mould on the surface in a dark and humid environment, high in manufacturing cost and the like are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel anti-corrosion, and specifically relates to a composite bonding anti-corrosion strip and a preparation method and an anti-corrosion method thereof. Background Art

[0002] In modern industry and infrastructure construction, metal materials are widely used in various fields, such as architecture, bridges, petrochemicals, and marine engineering. However, during use, metal materials are susceptible to corrosion due to the influence of surrounding environmental factors. Metal corrosion not only leads to a decline in material performance and shortened service life, but can also cause safety accidents, resulting in significant economic losses and social impacts.

[0003] Traditional anti-corrosion measures primarily include coating protection and cathodic protection. Coating protection involves applying an anti-corrosion coating to the metal surface to isolate it from the external environment, thereby achieving corrosion protection. Common coating materials include paints and coatings. However, these coatings have some drawbacks, such as limited adhesion between the coating and the metal surface. Over long-term use, the coating is prone to shedding and flaking, significantly reducing its anti-corrosion effectiveness. The durability and stability of the coating are particularly difficult to ensure in harsh environmental conditions, such as high temperature, high humidity, and strong acid and alkali environments.

[0004] Cathodic protection slows or prevents metal corrosion by applying an impressed current to the protected metal or connecting it to a metal with a more negative potential, turning the protected metal into a cathode. While cathodic protection can effectively prevent metal corrosion to a certain extent, it requires a continuous power supply or consumes a large amount of sacrificial anode material, resulting in high costs. Furthermore, the effectiveness of cathodic protection is limited in complex structures or areas where current is difficult to apply. Summary of the Invention

[0005] In response to the above situation, and to overcome the shortcomings of the existing technology, the present invention adopts a composite anti-corrosion technology, which is a new long-term anti-corrosion technology for special-shaped steel in marine atmospheric corrosion environments. The construction process is: rust removal of the steel surface, wrapping of anti-corrosion tape, and spraying of quick-film agent, etc. The two-layer supporting system of composite anti-corrosion tape and quick-film agent can achieve the anti-corrosion effect that can only be achieved by the four-layer combination of other brands. It also solves the problems of other coating technologies such as complex construction, single appearance color, easy damage when stepped on, inability to be immersed in water, easy mold growth on the surface in dark and humid environments, and high cost. It saves enterprises more than 50% of construction time and more than 30% of construction costs.

[0006] The present invention provides a composite bonding anti-corrosion strip and a preparation method and an anti-corrosion method;

[0007] The technical solution adopted by the present invention is as follows:

[0008] The present invention proposes an anti-corrosion method for a composite bonding anti-corrosion strip, which specifically includes the following steps:

[0009] ① Rust removal on the steel surface; use a pointed hammer, wire brush, angle grinder, brush, rag and other tools to remove loose coatings, rust layers, welding slag, burrs, oil stains, dust, etc. on the surface;

[0010] ② Wrapping the anti-corrosion tape: When pasting, lay the composite adhesive anti-corrosion tape flat to ensure that the anti-corrosion tape can adhere closely to the surface of the steel structure. After pasting, press it flat to ensure there are no bubbles or wrinkles.

[0011] ③ Apply the quick-film agent: Use a brush, roller or special spraying equipment to evenly apply the quick-film agent on the surface of the composite bonding anti-corrosion tape, and complete the construction after it solidifies;

[0012] Preferably, the film-forming agent comprises the following components in parts by weight: 50-60 parts of isocyanate prepolymer, 30-50 parts of amino-terminated polyether, 30-45 parts of chain extender, 0.5-1.0 parts of fumed silica, 0.1-0.5 parts of dispersant, 0.5-1.0 parts of defoaming agent, and 1.0-5.0 parts of color paste;

[0013] Preferably, the amino-terminated polyether comprises at least one of polyethylene glycol diamine, polyether diamine, and polytetramethylenetetramethylenediamine;

[0014] Preferably, the chain extender comprises at least one of 1,4-butanediol, diethylenetriamine, TDI, and MDI;

[0015] Preferably, the dispersant includes at least one of stearic acid amide, hexadecene amide, and lauryl amide;

[0016] Preferably, the defoaming agent includes at least one of polydimethylsiloxane, polyether-modified silicone oil defoaming agent BYK-022, and fluorosilicone oil defoaming agent Fluorosilicone 50;

[0017] Preferably, the color paste includes at least one of titanium dioxide paste, carbon black paste, and organic pigment paste;

[0018] Preferably, the raw materials for preparing the isocyanate prepolymer include the following components in parts by weight: polymer composite corrosion inhibitor: 1-3 parts, polyether polyol: 40-50 parts, fluorine-containing polyol: 5-10 parts, isocyanate: 40-50 parts;

[0019] Preferably, the -NCO content in the isocyanate prepolymer is 12%-20%;

[0020] Preferably, the isocyanate comprises at least one of MDI and TDI;

[0021] Preferably, the polyether polyol comprises at least one of polytetramethylene glycol and polyether glycol;

[0022] Preferably, the fluorine-containing polyol includes at least one of polyfluorovinyl alcohol and polyfluorovinyl ether;

[0023] Preferably, the method for preparing the isocyanate prepolymer specifically comprises the following steps:

[0024] Mix polyether polyol, fluorine-containing polyol and isocyanate, introduce inert gas, increase the reaction temperature to 70-100℃, react for 3-5 hours, add high molecular antifungal agent, maintain the temperature and continue to react for 1-2 hours, then dehydrate to obtain isocyanate prepolymer.

[0025] The present invention also provides a composite adhesive anti-corrosion tape, which comprises the following components in parts by weight: 3-5 parts of polyester non-woven fabric, 10-15 parts of linseed oil, 20-30 parts of mineral fat, 15-20 parts of polymer composite corrosion inhibitor, 10-20 parts of lubricant, 3-5 parts of mildew inhibitor, 5-10 parts of thickener, 10-20 parts of curing agent, 15-20 parts of filler, and 3-5 parts of tannic acid;

[0026] Preferably, the mineral fat comprises the following components in parts by weight: 7-8 parts of base oil, 1-1.5 parts of thickener, and 0.5-1 part of additives;

[0027] Preferably, the base oil includes at least one of paraffin oil and aromatic oil;

[0028] Preferably, the thickener comprises at least one of bentonite, montmorillonite, paraffin wax, aluminum stearate, lithium stearate, zinc stearate, and calcium stearate;

[0029] Preferably, the additive comprises at least one of an antioxidant, an anti-corrosion agent, an anti-wear agent and an anti-foaming agent;

[0030] Preferably, the lubricant includes at least one of liquid paraffin and white oil;

[0031] Preferably, the mildew preventer comprises at least one of 2-methyl-4-isothiazoline-3-one, 5-chloro-2-methyl-4-isothiazoline-3-one, 1,2-benzisothiazolin-3-one, and 2-(thiocyanatomethylthio)benzothiazole;

[0032] Preferably, the curing agent includes at least one of polyamide, 4,4'-diaminodiphenylmethane, diaminostilbene, terephthalic acid diamine, and cyclohexenyl diamine;

[0033] Preferably, the filler comprises at least one of calcium carbonate, aluminum hydroxide, magnesium hydroxide, organic bentonite, mineral mica and talc;

[0034] Preferably, the preparation method of the thickener specifically comprises the following steps:

[0035] S1. Dissolve pentaerythritol in 1,4-dioxane solvent, add a catalyst and mix well, increase the reaction temperature to 40-60°C, stir at 300-400 rpm, add 2-chloroethyl dichlorophosphoric acid dropwise, maintain the reaction conditions, react for 12-16 hours, increase the temperature to 80-90°C, react for 6-8 hours, cool, collect the solid by filtration, wash with 1,4-dioxane, and dry to obtain pentaerythritol phosphate;

[0036] Preferably, in step S1, the mass volume ratio between pentaerythritol and 2-chloroethyl dichlorophosphoric acid is 0.4-0.6 g / mL;

[0037] Preferably, in step S1, the mass concentration of pentaerythritol in 1,4-dioxane is 0.08-0.12 g / mL;

[0038] Preferably, in step S1, the added mass of the catalyst is 0.6%-0.8% of the mass of pentaerythritol, and the catalyst is at least one of magnesium oxide, titanium oxide, iron oxide, and zinc oxide;

[0039] S2. Dissolve the epoxy resin in toluene, add dibutyltin dilaurate and mix well, then add the pentaerythritol phosphate prepared in step S1, and stir at 200-300 rpm. After the reaction system is evenly mixed, increase the reaction temperature to 90-100° C., reflux for 12-18 hours, cool, adjust the reaction pH to neutral, remove excess solvent by distillation under reduced pressure, and vacuum dry for 6-8 hours to obtain a thickener;

[0040] Preferably, in step S2, the mass ratio between the epoxy resin and pentaerythritol phosphate is 1.2-1.5:1;

[0041] Preferably, in step S2, the added mass of dibutyltin dilaurate is 2%-3% of the weight of the epoxy resin;

[0042] Preferably, in step S2, the mass concentration of the epoxy resin in toluene is 0.7-0.8 g / mL;

[0043] Preferably, the preparation method of the polymer composite corrosion inhibitor specifically comprises the following steps:

[0044] P1. Disperse graphene oxide in anhydrous ethanol, ultrasonically treat at 600-800W for 1-2h, then add 3-aminopropyltriethoxysilane solution dropwise at 150-180rpm. After mixing evenly, increase the reaction temperature to 60-80°C, continue the reaction for 6-8h, cool, filter and collect the solid, wash repeatedly with anhydrous ethanol and deionized water, and vacuum dry to obtain amino-modified graphene oxide;

[0045] Preferably, in step P1, the mass concentration of the graphene oxide in anhydrous ethanol is 2-3 mg / mL;

[0046] Preferably, in step P1, the mass ratio between the graphene oxide and 3-aminopropyltriethoxysilane is 1:3-4;

[0047] P2. The amino-modified graphene oxide prepared in step P1 was dispersed in DMF. In an ice-water bath, triethylamine was added to adjust the pH to 8-9. Bromoisobutyryl bromide was added. The mixture was reacted at room temperature for 24-30 h. The mixture was centrifuged at 10,000-12,000 rpm for 20-30 min. The precipitate was collected, washed with anhydrous ethanol and deionized water, and dried in vacuo to obtain brominated graphene oxide.

[0048] Preferably, in step P2, the mass concentration of the amino-modified graphene oxide in DMF is 1-2 mg / mL;

[0049] Preferably, in step P2, the mass volume ratio between the amino graphene oxide and bromoisobutyryl bromide is 0.2-0.3 g / mL;

[0050] P3, dissolving imidazole-4,5-dicarboxylic acid in DMSO, adding 2-hydroxyethyl acrylate, mixing well, adding thionyl chloride, raising the reaction temperature to 70-90°C, stirring at 180-220 rpm, reacting for 4-8 hours, cooling, washing with a NaOH aqueous solution until neutral, removing the solvent by distillation under reduced pressure, adding anhydrous ether for extraction, collecting the organic phase, drying with anhydrous sodium sulfate to remove water, and purifying to obtain an acrylate polymer monomer;

[0051] Preferably, in step P3, the mass concentration of the imidazole-4,5-dicarboxylic acid in DMSO is 40-80 mg / mL;

[0052] Preferably, in step P3, the mass volume ratio between the imidazole-4,5-dicarboxylic acid and 2-hydroxyethyl acrylate is 0.7-1 g / mL;

[0053] Preferably, in step P3, the mass volume ratio between the imidazole-4,5-dicarboxylic acid and thionyl chloride is 0.5-0.6 g / mL;

[0054] P4. Dissolve the acrylate polymer monomer prepared in step P3 in anhydrous ethanol, mix well, add the brominated graphene oxide prepared in step P2, and ultrasonically treat at a power of 500-700 W for 2-4 hours. Then, add BPO (benzoyl peroxide), continue the reaction at 40-60° C. for 4-6 hours, cool, remove the solvent by distillation under reduced pressure, and vacuum dry to obtain modified graphene oxide;

[0055] Preferably, in step P4, the mass ratio of the acrylic acid ester polymer monomer to the brominated graphene oxide is 1:2-4;

[0056] Preferably, in step P4, the added mass of the BPO is 2%-3% of the mass of the acrylate polymer monomer;

[0057] P5. Dissolve silver nitrate in anhydrous ethanol, add ammonia solution to a pH of 8-9, add the modified graphite oxide prepared in step P4, mix evenly at 300-400 rpm, increase the reaction temperature to 40-50°C, and add sodium borohydride solution dropwise after the reaction for 3-4 hours. After the addition is complete, continue the reaction for 30-40 minutes, centrifuge, collect the precipitate, and thoroughly wash it with anhydrous ethanol and deionized water. After vacuum drying, obtain a polymer composite corrosion inhibitor;

[0058] The present invention provides a method for preparing a composite adhesive anti-corrosion tape, which specifically comprises the following steps:

[0059] Step 1: Add linseed oil, mineral fat, linseed oil, lubricant, polymer composite corrosion inhibitor, mildew inhibitor, thickener, curing agent, filler and tannic acid into the reactor in sequence, start the stirring device of the reactor, adjust the stirring speed, increase the temperature to 100-110°C, maintain the temperature for 1-2 hours, and obtain a premix;

[0060] Step 2: Place pre-cut polyester non-woven fabric with a width of 50 mm to 500 mm into the premix prepared in step 1;

[0061] Step 3: The impregnated polyester non-woven fabric is taken out from the reactor, cooled and solidified at room temperature, cut, rolled and stored to obtain a composite adhesive anti-corrosion tape having a thickness of 1.1 mm to 2.2 mm and a width of 50 mm to 500 mm.

[0062] The beneficial effects achieved by the present invention are as follows:

[0063] 1. Excellent corrosion resistance: The use of polymer composite corrosion inhibitors (such as modified graphene oxide) significantly enhances the material's corrosion resistance. Modified graphene oxide plays a significant role in enhancing the material's protective properties, especially in harsh environments, effectively preventing the penetration and reaction of corrosive media, thereby extending its service life.

[0064] The combination of thickener and polymer composite corrosion inhibitor not only increases the thickness of the material's protective layer, but also improves the material's adaptability to various corrosive environments, such as moisture, salt spray, acid and alkali, etc.

[0065] 2. Improved Bonding and Adhesion: Epoxy resin, as an excellent bonding material, forms strong bonds with a variety of substrates, enhancing the material's bonding properties. Modified epoxy resin further enhances its adhesion to various surface materials (such as metal, concrete, and glass), effectively improving the adhesion of the coating and ensuring that the material resists peeling or detachment during long-term use. Thickeners, by introducing phosphate esters and other functional groups, improve the resin's interfacial bonding properties, demonstrating enhanced durability and bond strength, particularly in harsh environmental conditions.

[0066] 3. Enhanced Mechanical Properties: The use of modified graphene oxide enhances the mechanical properties of composite materials. The addition of graphene oxide improves the material's tensile strength, compressive strength, and impact resistance, enabling the composite to withstand greater forces in practical applications without breaking or deforming. By combining graphene oxide with polymer monomers, the composite's rigidity and flexibility are enhanced, improving its overall wear and aging resistance and extending its service life.

[0067] 4. High and low temperature adaptability: The thickener and polymer composite corrosion inhibitor maintain stable performance across a wide range of temperatures. By incorporating temperature-sensitive ingredients (such as dioctyl ester), the material maintains excellent bonding and corrosion resistance at elevated temperatures (e.g., 120°C and above). Furthermore, the material maintains excellent mechanical strength and flexibility in low-temperature environments (e.g., -40°C to 0°C), demonstrating strong adaptability.

[0068] 5. Enhanced Long-Term Durability: Because the modified components contained in this composite material possess strong chemical stability and aging resistance, it is less susceptible to chemical degradation or physical property degradation after long-term exposure to UV rays, air, moisture, and other environmental factors. In particular, the structure formed through polymerization and surface modification can effectively resist external chemical erosion and mechanical damage, ensuring the stability and effectiveness of the material during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1This is a diagram of the anti-corrosion structure of the anti-corrosion method according to Example 1 of the present invention on the surface of steel; wherein 1 is steel, 2 is a composite bonding anti-corrosion tape, and 3 is a quick-filming agent;

[0070] Figure 2 Graph showing the corrosion performance results of the composite adhesive anti-corrosion strips prepared in Examples 1-3 of the present invention and Comparative Examples 1-3;

[0071] Figure 3 The dynamic polarization curves of the composite bonding anti-corrosion tapes prepared in Examples 1-3 and Comparative Examples 1-3 of the present invention are shown.

[0072] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0073] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those familiar to those skilled in the art. Furthermore, any methods and materials similar or equivalent to those described herein can be applied to the present invention. The preferred embodiments and materials described herein are for illustrative purposes only and are not intended to limit the scope of this application.

[0075] The experimental methods in the following examples, unless otherwise specified, are conventional methods; the test materials and test strains used in the following examples, unless otherwise specified, are purchased from commercial channels.

[0076] Example 1

[0077] This embodiment provides a composite adhesive anti-corrosion tape, which includes the following components in parts by weight: 3 parts of polyester non-woven fabric, 10 parts of linseed oil, 20 parts of mineral fat, 15 parts of polymer composite corrosion inhibitor, 10 parts of liquid paraffin, 3 parts of 2-methyl-4-isothiazoline-3-one, 5 parts of thickener, 10 parts of 4,4'-diaminodiphenylmethane, 15 parts of talc, and 3 parts of tannic acid;

[0078] The mineral fat comprises the following components in parts by weight: 8 parts of paraffin oil, 1.5 parts of lithium stearate, and 0.5 parts of zinc diallyl disulfide;

[0079] The preparation method of the thickener specifically comprises the following steps:

[0080] S1. Accurately weigh 4.0 g of pentaerythritol and dissolve it in 1,4-dioxane solvent. Add 32 mg of magnesium oxide catalyst and mix well. Raise the reaction temperature to 40°C and stir at 400 rpm. Add 10 mL of 2-chloroethyl dichlorophosphoric acid dropwise at a rate of 1 mL / min. Maintain the reaction conditions and react for 14 h. Then, raise the temperature to 80°C and react for 8 h. Cool the mixture and collect the solid by filtration. Wash the solid with 1,4-dioxane and vacuum dry it at 100°C for 12 h to obtain pentaerythritol phosphate.

[0081] S2. Accurately weigh 7 g of epoxy resin EP44 and dissolve it in 10 mL of dry toluene. Add 0.14 g of dibutyltin dilaurate to the reaction system and mix well. Then add 5 g of pentaerythritol phosphate prepared in step S1 and stir at 300 rpm. After the reaction system is evenly mixed, raise the reaction temperature to 95° C. and reflux for 12 h. Then cool and adjust the reaction pH to neutral. Remove excess solvent by distillation under reduced pressure and dry under vacuum at 50° C. for 6 h to obtain a thickener.

[0082] The preparation method of the polymer composite corrosion inhibitor specifically comprises the following steps:

[0083] P1. Accurately weigh 25 mg of graphene oxide, add it to 10 mL of anhydrous ethanol, vortex it, and then ultrasonically treat it at 800 W for 1 hour. Take 0.1 g of 3-aminopropyltriethoxysilane and dissolve it in 10 mL of anhydrous ethanol to obtain a 3-aminopropyltriethoxysilane solution, which is added dropwise to the reaction system at 2 mL / min. After the addition is complete, increase the reaction temperature to 70°C and continue the reaction for 8 hours. After the reaction is cooled to room temperature, the solid is collected by filtration, repeatedly washed with anhydrous ethanol and deionized water, and then dried in vacuo at 80°C for 12 hours to obtain amino-modified graphene oxide;

[0084] P2. Accurately weigh 20 mg of the amino-modified graphene oxide prepared in step P1 and disperse it in 10 mL of DMF. In an ice-water bath, add triethylamine to adjust the reaction pH to 8.5, add 0.1 mL of bromoisobutyryl bromide, and react at room temperature for 24 h. After centrifugation at 12,000 rpm for 20 min, collect the precipitate, wash it with anhydrous ethanol and deionized water, and dry it in vacuum to obtain brominated graphene oxide.

[0085] P3. Accurately weigh 1.58 g of imidazole-4,5-dicarboxylic acid and place it in a flask. Add 20 mL of DMSO to fully dissolve it. Accurately weigh 2.1 mL of 2-hydroxyethyl acrylate and add it to the reaction system. Stir it thoroughly at 150 rpm. Accurately weigh 2.6 mL of thionyl chloride and add it to the reaction system. Raise the reaction temperature to 70° C. and increase the stirring speed to 200 rpm to react. After reacting for 4 hours, cool the reaction to room temperature, transfer the reaction system to ice water, neutralize it with a 1 mol / L aqueous solution of NaOH, remove the reaction solvent by distillation under reduced pressure, add anhydrous ether for extraction, collect the organic phase, dry it with anhydrous sodium sulfate to remove water, and purify it to obtain an acrylate polymer monomer.

[0086] P4. Dissolve the acrylate polymer monomer prepared in step P3 in anhydrous ethanol, mix well, add the brominated graphene oxide prepared in step P2 at a mass ratio of 1:2 between the acrylate polymer monomer and the brominated graphene oxide, and ultrasonically treat the mixture at 700 W for 3 h. Then, add BPO (benzoyl peroxide) at 2% of the mass of the acrylate polymer monomer, continue the reaction at 50° C. for 5 h, cool, remove the solvent by distillation under reduced pressure, and dry in vacuo to obtain modified graphene oxide.

[0087] P5. Dissolve silver nitrate in anhydrous ethanol, add ammonia solution to pH 9, add the modified graphite oxide prepared in step P4, mix evenly at 400 rpm, increase the reaction temperature to 40°C, and add sodium borohydride solution dropwise after the reaction for 4 hours. After the addition is complete, continue the reaction for 30 minutes, centrifuge at 8000 rpm for 10 minutes, collect the precipitate, wash it thoroughly with anhydrous ethanol and deionized water, and dry it in vacuo at 60°C for 12 hours to obtain a polymer composite corrosion inhibitor;

[0088] This embodiment also provides a method for preparing a composite adhesive anti-corrosion tape, which specifically includes the following steps:

[0089] Step 1: Add linseed oil, mineral fat, linseed oil, liquid paraffin, polymer composite corrosion inhibitor, 2-methyl-4-isothiazoline-3-one, thickener, 4,4'-diaminodiphenylmethane, talc and tannic acid into the reactor in sequence, start the stirring device of the reactor, adjust the stirring speed to 100 rpm, increase the temperature to 100°C, maintain the temperature for 2 hours, and obtain a premix;

[0090] Step 2: Place the pre-cut polyester non-woven fabric with a width of 100 mm into the premix prepared in step 1;

[0091] Step 3: The impregnated polyester non-woven fabric is taken out from the reactor, cooled and solidified at room temperature, cut, rolled and stored to obtain a composite adhesive anti-corrosion tape having a thickness of 1.5 mm and a width of 100 mm.

[0092] refer to Figure 1 , Figure 1 This is a diagram of the anti-corrosion structure of the anti-corrosion method of Example 1 of the present invention on the surface of steel. This embodiment also provides an anti-corrosion method for a composite bonding anti-corrosion strip, which specifically includes the following steps:

[0093] ① Rust removal on the steel surface; use a pointed hammer, wire brush, angle grinder, brush, rag and other tools to remove loose coatings, rust layers, welding slag, burrs, oil stains, dust, etc. on the surface;

[0094] ② Wrapping the anti-corrosion tape: When pasting, lay the composite adhesive anti-corrosion tape flat to ensure that the anti-corrosion tape can adhere closely to the surface of the steel structure. After pasting, press it flat to ensure there are no bubbles or wrinkles.

[0095] ③ Apply the quick-film agent: Use a brush, roller or special spraying equipment to evenly apply the quick-film agent on the surface of the composite bonding anti-corrosion tape, and complete the construction after it solidifies;

[0096] The film-forming agent includes the following components in parts by weight: 60 parts of isocyanate prepolymer, 30 parts of polyether diamine, 30 parts of TDI, 0.5 parts of fumed silica, 0.3 parts of stearic acid amide, 0.5 parts of polydimethylsiloxane, and 1.0 parts of titanium dioxide slurry;

[0097] The raw materials for preparing the isocyanate prepolymer include the following components in parts by weight: 1 part of a polymer composite corrosion inhibitor, 40 parts of polytetramethylene glycol, 5 parts of polyvinyl fluoride, and 40 parts of MDI;

[0098] The preparation method of isocyanate prepolymer specifically comprises the following steps:

[0099] Polytetrahydrofuran diol, polyvinyl fluoride and MDI were mixed, nitrogen was introduced, the reaction temperature was raised to 70°C, and after reacting for 5 hours, a polymer composite corrosion inhibitor was added, the temperature was maintained and the reaction was continued for 2 hours, and then dehydrated to obtain an isocyanate prepolymer.

[0100] Example 2

[0101] This embodiment provides a composite adhesive anti-corrosion tape, which includes the following components in parts by weight: 4 parts of polyester non-woven fabric, 12 parts of linseed oil, 25 parts of mineral fat, 17 parts of polymer composite corrosion inhibitor, 15 parts of liquid paraffin, 4 parts of 5-chloro-2-methyl-4-isothiazoline-3-one, 10 parts of thickener, 15 parts of 4,4'-diaminodiphenylmethane, 20 parts of calcium carbonate, and 4 parts of tannic acid;

[0102] The mineral fat comprises the following components in parts by weight: 7 parts of paraffin oil, 1 part of lithium stearate, and 1 part of zinc diallyl disulfide;

[0103] The preparation method of the thickener specifically comprises the following steps:

[0104] S1. Accurately weigh 5.4 g of pentaerythritol and dissolve it in 1,4-dioxane solvent. Add 32 mg of zinc oxide catalyst and mix well. Raise the reaction temperature to 50°C and stir at 350 rpm. Add 10 mL of 2-chloroethyl dichlorophosphoric acid dropwise at a rate of 1 mL / min. Maintain the reaction conditions and react for 16 h. Then, raise the temperature to 85°C and react for 6 h. Cool the mixture and collect the solid by filtration. Wash the solid with 1,4-dioxane and vacuum dry it at 100°C for 12 h to obtain pentaerythritol phosphate.

[0105] S2. Accurately weigh 6 g of epoxy resin EP44 and dissolve it in 10 mL of dry toluene. Add 0.12 g of dibutyltin dilaurate to the reaction system and mix well. Then add 5 g of pentaerythritol phosphate prepared in step S1 and stir at 200 rpm. After the reaction system is evenly mixed, raise the reaction temperature to 100° C. and reflux for 15 hours. Then cool and adjust the reaction pH to neutral. Remove excess solvent by distillation under reduced pressure and dry under vacuum at 50° C. for 6 hours to obtain a thickener.

[0106] The preparation method of the polymer composite corrosion inhibitor specifically comprises the following steps:

[0107] P1. Accurately weigh 20 mg of graphene oxide, add it to 10 mL of anhydrous ethanol, vortex it, and then ultrasonically treat it at 600 W for 2 h. Take 80 mg of 3-aminopropyltriethoxysilane and dissolve it in 10 mL of anhydrous ethanol to obtain a 3-aminopropyltriethoxysilane solution, which is added dropwise to the reaction system at 2 mL / min. After the addition is complete, increase the reaction temperature to 60°C and continue the reaction for 7 h. After the reaction is cooled to room temperature, the solid is collected by filtration, repeatedly washed with anhydrous ethanol and deionized water, and then dried in vacuo at 80°C for 12 h to obtain amino-modified graphene oxide;

[0108] P2. Accurately weigh 20 mg of the amino-modified graphene oxide prepared in step P1 and disperse it in 20 mL of DMF. In an ice-water bath, add triethylamine to adjust the reaction pH to 8.0, add 0.08 mL of bromoisobutyryl bromide, and react at room temperature for 30 h. After centrifugation at 11,000 rpm for 20 min, collect the precipitate, wash it with anhydrous ethanol and deionized water, and dry it in vacuo to obtain brominated graphene oxide.

[0109] P3. Accurately weigh 1.58 g of imidazole-4,5-dicarboxylic acid and place it in a flask. Add 30 mL of DMSO to fully dissolve it. Accurately weigh 1.6 mL of 2-hydroxyethyl acrylate and add it to the reaction system. Stir it thoroughly at 150 rpm. Accurately weigh 2.7 mL of thionyl chloride and add it to the reaction system. Raise the reaction temperature to 60° C. and increase the stirring speed to 220 rpm to react. After reacting for 6 hours, cool the reaction to room temperature, transfer the reaction system to ice water, neutralize it with a 1 mol / L aqueous solution of NaOH, remove the reaction solvent by distillation under reduced pressure, add anhydrous ether for extraction, collect the organic phase, dry it with anhydrous sodium sulfate to remove water, and purify it to obtain an acrylate polymer monomer.

[0110] P4, dissolving the acrylate polymer monomer prepared in step P3 in anhydrous ethanol, mixing evenly, adding the brominated graphene oxide prepared in step P2 at a mass ratio of acrylate polymer monomer to brominated graphene oxide of 1:3, placing it under ultrasonic treatment at 600 W power, after treating for 4 hours, adding BPO (benzoyl peroxide) at 3% of the mass of the acrylate polymer monomer, continuing the reaction at 40°C for 6 hours, cooling, removing the solvent by distillation under reduced pressure, and vacuum drying to obtain modified graphene oxide;

[0111] P5. Dissolve silver nitrate in anhydrous ethanol, add ammonia solution to pH 8, add the modified graphite oxide prepared in step P4, mix evenly at 300 rpm, increase the reaction temperature to 50°C, and add sodium borohydride solution dropwise after the reaction for 3 hours. After the addition is complete, continue the reaction for 40 minutes, centrifuge at 8000 rpm for 10 minutes, collect the precipitate, wash it thoroughly with anhydrous ethanol and deionized water, and dry it in vacuo at 60°C for 12 hours to obtain a polymer composite corrosion inhibitor;

[0112] This embodiment also provides a method for preparing a composite adhesive anti-corrosion tape, which specifically includes the following steps:

[0113] Step 1: Add linseed oil, mineral fat, linseed oil, liquid paraffin, polymer composite corrosion inhibitor, 2-methyl-4-isothiazoline-3-one, thickener, 4,4'-diaminodiphenylmethane, calcium carbonate and tannic acid into the reactor in sequence, start the stirring device of the reactor, adjust the stirring speed to 100 rpm, increase the temperature to 100°C, maintain the temperature for 2 hours, and obtain a premix;

[0114] Step 2: Place the pre-cut polyester non-woven fabric with a width of 300 mm into the premix prepared in step 1;

[0115] Step 3: The impregnated polyester non-woven fabric is taken out from the reactor, cooled and solidified at room temperature, cut, rolled and stored to obtain a composite adhesive anti-corrosion tape having a thickness of 2.2 mm and a width of 300 mm.

[0116] This embodiment also provides an anti-corrosion method for a composite adhesive anti-corrosion tape, which specifically includes the following steps:

[0117] ① Rust removal on the steel surface; use a pointed hammer, wire brush, angle grinder, brush, rag and other tools to remove loose coatings, rust layers, welding slag, burrs, oil stains, dust, etc. on the surface;

[0118] ② Wrapping the anti-corrosion tape: When pasting, lay the composite adhesive anti-corrosion tape flat to ensure that the anti-corrosion tape can adhere closely to the surface of the steel structure. After pasting, press it flat to ensure there are no bubbles or wrinkles.

[0119] ③ Apply the quick-film agent: Use a brush, roller or special spraying equipment to evenly apply the quick-film agent on the surface of the composite bonding anti-corrosion tape, and complete the construction after it solidifies;

[0120] The film-forming agent includes the following components in parts by weight: 50 parts of isocyanate prepolymer, 40 parts of polyethylene glycol diamino, 40 parts of MDI, 1.0 parts of fumed silica, 0.5 parts of hexadecene amide, 0.7 parts of polyether modified silicone oil defoamer BYK-02, and 3.0 parts of titanium dioxide slurry;

[0121] The raw materials for preparing the isocyanate prepolymer include the following components in parts by weight: 2 parts of polymer composite corrosion inhibitor, 45 parts of polyether diol, 7 parts of polyfluorovinyl ether, and 50 parts of MDI;

[0122] The preparation method of isocyanate prepolymer specifically comprises the following steps:

[0123] Mix polyether diol, polyvinyl fluoride, and MDI, introduce inert gas, raise the reaction temperature to 70-100°C, react for 3-5 hours, add a polymer composite corrosion inhibitor, maintain the temperature and continue the reaction for 1-2 hours, and then dehydrate to obtain an isocyanate prepolymer.

[0124] Example 3

[0125] This embodiment provides a composite adhesive anti-corrosion tape, which includes the following components in parts by weight: 5 parts of polyester non-woven fabric, 15 parts of linseed oil, 30 parts of mineral fat, 20 parts of polymer composite corrosion inhibitor, 10 parts of liquid paraffin, 5 parts of 2-methyl-4-isothiazoline-3-one, 7 parts of thickener, 20 parts of diaminobenzylbenzene, 18 parts of magnesium hydroxide, and 5 parts of tannic acid;

[0126] The mineral fat comprises the following components in parts by weight: 8 parts of paraffin oil, 1.5 parts of lithium stearate, and 0.5 parts of zinc diallyl disulfide;

[0127] The preparation method of the thickener specifically comprises the following steps:

[0128] S1. Accurately weigh 6.0 g of pentaerythritol and dissolve it in 1,4-dioxane solvent. Add 42 mg of catalyst and mix well. Raise the reaction temperature to 60°C and stir at 300 rpm. Add 10 mL of 2-chloroethyl dichlorophosphoric acid dropwise at a rate of 1 mL / min. Maintain the reaction conditions and react for 12 h. Then, raise the temperature to 90°C and react for 7 h. Cool the mixture and collect the solid by filtration. Wash the solid with 1,4-dioxane and vacuum dry it at 100°C for 12 h to obtain pentaerythritol phosphate.

[0129] S2. Accurately weigh 8 g of epoxy resin EP44 and dissolve it in 10 mL of dry toluene. Add 0.24 g of dibutyltin dilaurate to the reaction system and mix well. Then add 6.67 g of pentaerythritol phosphate prepared in step S1 and stir at 250 rpm. After the reaction system is evenly mixed, raise the reaction temperature to 90° C. and reflux for 18 hours. Then cool and adjust the reaction pH to neutral. Remove excess solvent by distillation under reduced pressure and dry under vacuum at 50° C. for 6 hours to obtain a thickener.

[0130] The preparation method of the polymer composite corrosion inhibitor specifically comprises the following steps:

[0131] P1. Accurately weigh 30 mg of graphene oxide, add it to 10 mL of anhydrous ethanol, vortex it, and then ultrasonically treat it at 700 W for 1 hour. Take 90 mg of 3-aminopropyltriethoxysilane and dissolve it in 10 mL of anhydrous ethanol to obtain a 3-aminopropyltriethoxysilane solution, which is added dropwise to the reaction system at 2 mL / min. After the addition is complete, increase the reaction temperature to 80°C and continue the reaction for 6 hours. After the reaction is cooled to room temperature, the solid is collected by filtration, repeatedly washed with anhydrous ethanol and deionized water, and then dried in vacuo at 80°C for 12 hours to obtain amino-modified graphene oxide;

[0132] P2. Accurately weigh 30 mg of the amino-modified graphene oxide prepared in step P1 and disperse it in 20 mL of DMF. In an ice-water bath, add triethylamine to adjust the reaction pH to 9.0, add 0.1 mL of bromoisobutyryl bromide, and react at room temperature for 28 h. After centrifugation at 10,000 rpm for 30 min, collect the precipitate, wash it with anhydrous ethanol and deionized water, and dry it in vacuum to obtain brominated graphene oxide.

[0133] P3. Accurately weigh 1.58 g of imidazole-4,5-dicarboxylic acid and place it in a flask. Add 40 mL of DMSO to fully dissolve it. Accurately weigh 2.3 mL of 2-hydroxyethyl acrylate and add it to the reaction system. Stir it thoroughly at 150 rpm. Accurately weigh 3.1 mL of thionyl chloride and add it to the reaction system. Raise the reaction temperature to 50° C. and increase the stirring speed to 180 rpm to react. After reacting for 8 hours, cool the reaction to room temperature, transfer the reaction system to ice water, neutralize it with a 1 mol / L aqueous solution of NaOH, remove the reaction solvent by distillation under reduced pressure, add anhydrous ether for extraction, collect the organic phase, dry it with anhydrous sodium sulfate to remove water, and purify it to obtain an acrylate polymer monomer.

[0134] P4, dissolving the acrylate polymer monomer prepared in step P3 in anhydrous ethanol, mixing well, adding the brominated graphene oxide prepared in step P2 at a mass ratio of acrylate polymer monomer to brominated graphene oxide of 1:4, placing it under ultrasonic treatment at a power of 500 W, after treating for 2 hours, adding BPO (benzoyl peroxide) at a rate of 2.5% by mass of the acrylate polymer monomer, continuing the reaction at 60° C. for 4 hours, cooling, removing the solvent by distillation under reduced pressure, and vacuum drying to obtain modified graphene oxide;

[0135] P5. Dissolve silver nitrate in anhydrous ethanol, add ammonia solution to pH 8.5, add the modified graphite oxide prepared in step P4, mix evenly at 400 rpm, increase the reaction temperature to 45 ° C, increase the reaction temperature for 3 hours, and then add sodium borohydride solution dropwise. After the addition is complete, continue the reaction for 30 minutes, centrifuge at 8000 rpm for 10 minutes, collect the precipitate, wash it thoroughly with anhydrous ethanol and deionized water, and dry it in vacuo at 60 ° C for 12 hours to obtain a polymer composite corrosion inhibitor.

[0136] This embodiment also provides a method for preparing a composite adhesive anti-corrosion tape, which specifically includes the following steps:

[0137] Step 1: Add linseed oil, mineral fat, linseed oil, liquid paraffin, polymer composite corrosion inhibitor, 2-methyl-4-isothiazoline-3-one, thickener, 4,4'-diaminodiphenylmethane, talc and tannic acid into the reactor in sequence, start the stirring device of the reactor, adjust the stirring speed to 100 rpm, increase the temperature to 110°C, maintain the temperature for 1 hour, and obtain a premix;

[0138] Step 2: Place the pre-cut polyester non-woven fabric with a width of 500 mm into the premix prepared in step 1;

[0139] Step 3: The impregnated polyester non-woven fabric is taken out from the reactor, cooled and solidified at room temperature, cut, rolled and stored to obtain a composite adhesive anti-corrosion tape having a thickness of 1.1 mm and a width of 500 mm.

[0140] This embodiment also provides an anti-corrosion method for a composite adhesive anti-corrosion tape, which specifically includes the following steps:

[0141] ① Rust removal on the steel surface; use a pointed hammer, wire brush, angle grinder, brush, rag and other tools to remove loose coatings, rust layers, welding slag, burrs, oil stains, dust, etc. on the surface;

[0142] ② Wrapping the anti-corrosion tape: When pasting, lay the composite adhesive anti-corrosion tape flat to ensure that the anti-corrosion tape can adhere closely to the surface of the steel structure. After pasting, press it flat to ensure there are no bubbles or wrinkles.

[0143] ③ Apply the quick-film agent: Use a brush, roller or special spraying equipment to evenly apply the quick-film agent on the surface of the composite bonding anti-corrosion tape, and complete the construction after it solidifies;

[0144] The film-forming agent includes the following components in parts by weight: 55 parts of isocyanate prepolymer, 50 parts of polyether diamine, 45 parts of TDI, 0.7 parts of fumed silica, 0.1 parts of lauramide, 1.0 parts of polyether modified silicone oil defoamer BYK-02, and 5.0 parts of titanium dioxide slurry;

[0145] The raw materials for preparing the isocyanate prepolymer include the following components in parts by weight: 3 parts of polymer composite corrosion inhibitor, 50 parts of polyether diol, 10 parts of polyfluoroethylene alcohol, and 45 parts of MDI;

[0146] The preparation method of the isocyanate prepolymer specifically comprises the following steps:

[0147] Mix polyether diol, polyvinyl fluoride and MDI, introduce inert gas, increase the reaction temperature to 70-100°C, react for 3-5 hours, add polymer composite corrosion inhibitor, maintain the temperature and continue to react for 1-2 hours, then dehydrate to obtain isocyanate prepolymer.

[0148] Comparative Example 1

[0149] This comparative example provides a bonding anti-corrosion material, which differs from Example 1 only in that the thickener described in Example 1 is replaced by the same weight portion of epoxy resin EP44.

[0150] Comparative Example 2

[0151] This comparative example provides a bonding type anti-corrosion material, which differs from Example 1 only in that the preparation method of the polymer composite corrosion inhibitor does not include steps P2 to P4.

[0152] Comparative Example 3

[0153] This comparative example provides a bonding type anti-corrosion material, which differs from Example 1 only in that the polymer composite corrosion inhibitor described in Example 1 is replaced by the same weight portion of reduced graphene oxide.

[0154] Experimental Example 1

[0155] This experimental example tests the corrosion resistance of the composite bonding anti-corrosion materials prepared in Examples 1-3 and Comparative Examples 1-3. After the composite bonding anti-corrosion materials prepared in the Examples and Comparative Examples were constructed according to the application examples, they were subjected to a water-oxygen corrosion treatment at 50°C for 100 hours. Water vapor: oxygen volume ratio was 1:1, and the flow rate was 85 mL / min into a tube furnace. The tube furnace temperature was maintained at 500°C. Samples were taken at 10 hours, 20 hours, 50 hours, and 100 hours, and the weight of the dried samples was measured using a high-precision analytical balance to calculate the corrosion weight loss rate of the samples.

[0156] Corrosion weight loss rate (%) = (M0-Mt) / M0×100%;

[0157] Where M0 is the initial weight of the coating; Mt is the weight of the coating at the time of sampling.

[0158] Figure 2 The corrosion performance results of the composite bonded anti-corrosion materials prepared in Examples 1-3 of the present invention and Comparative Examples 1-3 are shown in the figure. As shown in the figure, the composite bonded anti-corrosion materials prepared in Examples 1-3 have good water corrosion resistance, and their corrosion rate is less than 15% within 100 hours; while the composite bonded anti-corrosion materials prepared in Comparative Examples 1-3 have a basic corrosion rate of 15% within 20-40 hours.

[0159] Experimental Example 2

[0160] In this experimental example, the composite bonding anti-corrosion materials prepared in Examples 1-3 and Comparative Examples 1-3 were constructed according to the application examples, and their anti-corrosion performance was analyzed using the polarization curve analysis method. Deionized water was used as the solvent, 3.5 wt.% NaCl was added as the solute, and the corrosive medium was used. The polarization resistance was calculated according to the following formula:

[0161] ;

[0162] Where Icorr represents the corrosion current density, βa represents the anodic Tafel slope, and βb represents the cathodic Tafel slope;

[0163] Figure 3The dynamic polarization curves of the composite bonded anti-corrosion materials prepared in Examples 1-3 and Comparative Examples 1-3 of the present invention are shown in the figure. The composite bonded anti-corrosion materials prepared in Examples 1-3 have higher corrosion resistance and higher polarization resistance, with a resistivity of 125.4-162.3 kΩ·cm. -2 , which shows that the composite bonding anti-corrosion material prepared in the embodiment of the present invention has high corrosion resistance. It can improve the spread of corrosive media through high sealing, and at the same time, it can complex the iron ions produced by steel corrosion to form a complex, which can further prevent the spread of corrosive media.

[0164] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

[0165] The present invention and its embodiments are described above. Such description is not restrictive. The drawings show only one embodiment of the present invention, and actual applications are not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, any method and embodiment similar to the technical solution without creative design shall fall within the scope of protection of the present invention.

Claims

1. A composite bonding anti-corrosion strip, characterized by: The composite adhesive anti-corrosion tape comprises the following components in parts by weight: 3-5 parts of polyester non-woven fabric, 10-15 parts of linseed oil, 20-30 parts of mineral fat, 15-20 parts of polymer composite corrosion inhibitor, 10-20 parts of lubricant, 3-5 parts of mildew inhibitor, 5-10 parts of thickener, 10-20 parts of curing agent, 15-20 parts of filler, and 3-5 parts of tannic acid; The mineral fat comprises the following components in parts by weight: 7-8 parts of base oil, 1-1.5 parts of thickener, and 0.5-1 part of additives.

2. The composite adhesive anti-corrosion strip according to claim 1, characterized in that: The base oil includes at least one of paraffin oil and aromatic oil; the thickener includes at least one of bentonite, montmorillonite, solid paraffin, aluminum stearate, lithium stearate, zinc stearate, and calcium stearate; the additive includes at least one of an antioxidant, a corrosion inhibitor, an antiwear agent, and an antifoaming agent; The lubricant includes at least one of liquid paraffin and white oil; The mildew preventer comprises at least one of 2-methyl-4-isothiazoline-3-one, 5-chloro-2-methyl-4-isothiazoline-3-one, 1,2-benzisothiazolin-3-one, and 2-(thiocyanatomethylthio)benzothiazole; The curing agent includes at least one of polyamide, 4,4'-diaminodiphenylmethane, diaminostilbene, terephthalic acid diamine, and cyclohexene diamine; The filler comprises at least one of calcium carbonate, aluminum hydroxide, magnesium hydroxide, organic bentonite, mineral mica and talc.

3. The composite adhesive anti-corrosion strip according to claim 2, characterized in that: The preparation method of the thickener specifically comprises the following steps: S1. Dissolve pentaerythritol in 1,4-dioxane solvent, add a catalyst and mix well, increase the reaction temperature to 40-60°C, stir at 300-400 rpm, add 2-chloroethyl dichlorophosphoric acid dropwise, maintain the reaction conditions, react for 12-16 hours, increase the temperature to 80-90°C, react for 6-8 hours, cool, collect the solid by filtration, wash with 1,4-dioxane, and dry to obtain pentaerythritol phosphate; S2. Dissolve the epoxy resin in toluene, add dibutyltin dilaurate and mix well, then add the pentaerythritol phosphate prepared in step S1, and stir at a speed of 200-300 rpm. After the reaction system is evenly mixed, increase the reaction temperature to 90-100° C., reflux for 12-18 hours, cool, adjust the reaction pH to neutral, remove excess solvent by distillation under reduced pressure, and vacuum dry for 6-8 hours to obtain a thickener.

4. The composite adhesive anti-corrosion strip according to claim 3, characterized in that: In step S1, the mass volume ratio between the pentaerythritol and 2-chloroethyl dichlorophosphoric acid is 0.4-0.6 g / mL; In step S1, the mass concentration of pentaerythritol in 1,4-dioxane is 0.08-0.12 g / mL; In step S1, the added mass of the catalyst is 0.6%-0.8% of the mass of pentaerythritol, and the catalyst is at least one of magnesium oxide, titanium oxide, iron oxide, and zinc oxide; In step S2, the mass ratio between the epoxy resin and pentaerythritol phosphate is 1.2-1.5:1; In step S2, the added mass of dibutyltin dilaurate is 2%-3% of the weight of the epoxy resin; In step S2, the mass concentration of the epoxy resin in toluene is 0.7-0.8 g / mL.

5. The composite adhesive anti-corrosion strip according to claim 4, characterized in that: The preparation method of the polymer composite corrosion inhibitor specifically comprises the following steps: P1. Disperse graphene oxide in anhydrous ethanol, ultrasonically treat at 600-800W for 1-2h, then add 3-aminopropyltriethoxysilane solution dropwise at 150-180rpm. After mixing evenly, increase the reaction temperature to 60-80°C, continue the reaction for 6-8h, cool, filter and collect the solid, wash repeatedly with anhydrous ethanol and deionized water, and vacuum dry to obtain amino-modified graphene oxide; P2. The amino-modified graphene oxide prepared in step P1 was dispersed in DMF. In an ice-water bath, triethylamine was added to adjust the pH to 8-9. Bromoisobutyryl bromide was added. The mixture was reacted at room temperature for 24-30 h. The mixture was centrifuged at 10,000-12,000 rpm for 20-30 min. The precipitate was collected, washed with anhydrous ethanol and deionized water, and dried in vacuo to obtain brominated graphene oxide. P3, dissolving imidazole-4,5-dicarboxylic acid in DMSO, adding 2-hydroxyethyl acrylate, mixing well, adding thionyl chloride, raising the reaction temperature to 70-90°C, stirring at 180-220 rpm, reacting for 4-8 hours, cooling, washing with a NaOH aqueous solution until neutral, removing the solvent by distillation under reduced pressure, adding anhydrous ether for extraction, collecting the organic phase, drying with anhydrous sodium sulfate to remove water, and purifying to obtain an acrylate polymer monomer; P4. Dissolve the acrylate polymer monomer prepared in step P3 in anhydrous ethanol, mix well, add the brominated graphene oxide prepared in step P2, and subject to ultrasonic treatment at a power of 500-700 W for 2-4 hours. Then, add BPO, continue the reaction at 40-60° C. for 4-6 hours, cool, remove the solvent by distillation under reduced pressure, and vacuum dry to obtain modified graphene oxide; P5. Dissolve silver nitrate in anhydrous ethanol, add ammonia solution to pH 8-9, add the modified graphite oxide prepared in step P4, mix evenly at 300-400 rpm, increase the reaction temperature to 40-50 ° C, and add sodium borohydride solution dropwise after the reaction for 3-4 hours. After the addition is complete, continue the reaction for 30-40 minutes, centrifuge, collect the precipitate, wash it thoroughly with anhydrous ethanol and deionized water, and vacuum dry it to obtain a polymer composite corrosion inhibitor.

6. The composite bonding anti-corrosion material according to claim 7, characterized in that: In step P1, the mass concentration of the graphene oxide in anhydrous ethanol is 2-3 mg / mL; In step P1, the mass ratio between the graphene oxide and 3-aminopropyltriethoxysilane is 1:3-4; In step P2, the mass concentration of the amino-modified graphene oxide in DMF is 1-2 mg / mL; In step P2, the mass volume ratio between the amino graphene oxide and bromoisobutyryl bromide is 0.2-0.3 g / mL; In step P3, the mass concentration of the imidazole-4,5-dicarboxylic acid in DMSO is 40-80 mg / mL; In step P3, the mass volume ratio between the imidazole-4,5-dicarboxylic acid and 2-hydroxyethyl acrylate is 0.7-1 g / mL; In step P3, the mass volume ratio between the imidazole-4,5-dicarboxylic acid and thionyl chloride is 0.5-0.6 g / mL; In step P4, the mass ratio of the acrylic acid ester polymer monomer to the brominated graphene oxide is 1:2-4; In step P4, the added mass of the BPO is 2%-3% of the mass of the acrylate polymer monomer.

7. A method for preparing the composite adhesive anti-corrosion tape according to any one of claims 1 to 5, characterized in that: The specific steps include: Step 1: Add linseed oil, mineral fat, linseed oil, lubricant, polymer composite corrosion inhibitor, mildew inhibitor, thickener, curing agent, filler and tannic acid into the reactor in sequence, start the stirring device of the reactor, adjust the stirring speed, increase the temperature to 100-110°C, maintain the temperature for 1-2 hours, and obtain a premix; Step 2: Place pre-cut polyester non-woven fabric with a width of 50 mm to 500 mm into the premix prepared in step 1; Step 3: The impregnated polyester non-woven fabric is taken out from the reactor, cooled and solidified at room temperature, cut, rolled and stored to obtain a composite adhesive anti-corrosion tape having a thickness of 1.1 mm to 2.2 mm and a width of 50 mm to 500 mm.

8. An anti-corrosion method for a composite adhesive anti-corrosion strip according to any one of claims 1 to 5, characterized in that: The specific steps include: ① Rust removal on the steel surface; use a pointed hammer, wire brush, angle grinder, brush, rag and other tools to remove loose coatings, rust layers, welding slag, burrs, oil stains, dust, etc. on the surface; ② Wrapping the anti-corrosion tape: When pasting, lay the composite adhesive anti-corrosion tape flat to ensure that the anti-corrosion tape can adhere closely to the surface of the steel structure. After pasting, press it flat to ensure there are no bubbles or wrinkles. ③ Apply the quick-film agent: Use a brush, roller or special spraying equipment to evenly apply the quick-film agent on the surface of the composite bonding anti-corrosion tape, and complete the construction after it solidifies.

9. The anti-corrosion method of the composite bonding anti-corrosion strip according to claim 8, characterized in that: The film-forming agent comprises the following components in parts by weight: 50-60 parts of isocyanate prepolymer, 30-50 parts of amino-terminated polyether, 30-45 parts of chain extender, 0.5-1.0 parts of fumed silica, 0.1-0.5 parts of dispersant, 0.5-1.0 parts of defoamer, and 1.0-5.0 parts of color paste; the amino-terminated polyether comprises at least one of polyethylene glycol diamine, polyether diamine, and polytetramethylene glycol diamine; The chain extender includes at least one of 1,4-butanediol, diethylenetriamine, TDI, and MDI; The dispersant includes at least one of stearic acid amide, hexadecene amide, and lauryl amide; The defoaming agent includes at least one of polydimethylsiloxane, polyether modified silicone oil defoaming agent BYK-022, and fluorosilicone oil defoaming agent Fluorosilicone 50; The color paste includes at least one of titanium dioxide paste, carbon black paste, and organic pigment paste; The raw materials for preparing the isocyanate prepolymer include the following components in parts by weight: polymer composite corrosion inhibitor: 1-3 parts, polyether polyol: 40-50 parts, fluorine-containing polyol: 5-10 parts, isocyanate: 40-50 parts; The -NCO content in the isocyanate prepolymer is 12%-20%; The isocyanate includes at least one of MDI and TDI; The polyether polyol comprises at least one of polytetramethylene glycol and polyether glycol; The fluorine-containing polyol includes at least one of polyfluorovinyl alcohol and polyfluorovinyl ether.

10. The anti-corrosion method of the composite bonding anti-corrosion strip according to claim 9, characterized in that: The preparation method of the isocyanate prepolymer specifically comprises the following steps: Mix polyether polyol, fluorine-containing polyol and isocyanate, introduce inert gas, increase the reaction temperature to 70-100℃, react for 3-5 hours, add high molecular antifungal agent, maintain the temperature and continue to react for 1-2 hours, then dehydrate to obtain isocyanate prepolymer.

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