Graphene and aromatic resin synergistically modified anticorrosive paint and preparation method thereof

Abstract

The invention discloses a graphene and aromatic resin synergistically modified anticorrosive coating and a preparation method thereof. The graphene and aromatic resin synergistically modified anticorrosive coating is prepared from a component A, a component B and a component C, the component A comprises n-butyl acrylate, styrene, an initiator, a functional monomer and a solvent; the component B is aromatic hydrocarbon resin, and the aromatic hydrocarbon resin accounts for 10-30 wt% of the total amount of the component A; the component C is graphene slurry, and graphene in the graphene slurry accounts for 0.5-6 wt% of the total amount of the component A. According to the invention, the micro synergistic effect of graphene and aromatic resin is utilized, the corrosion resistance of the coating can be efficiently improved, and meanwhile, the method has the advantages of simple preparation process, good adhesive force, stable corrosion resistance and low cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings, and in particular relates to a graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating and a preparation method thereof. The anti-corrosion coating can be applied to chemical machinery, ships, docks, containers and other fields. Background Art

[0002] Anti-corrosion coatings have always been one of the important branches of coatings and are widely used in industrial production. In the production of the national economy, the use of a large number of metal products has led to high requirements for equipment anti-corrosion, and the market demand for anti-corrosion coatings has continued to rise. According to relevant statistics, the economic losses caused by corrosion in the world each year are as high as one trillion US dollars, far exceeding the economic losses caused by natural disasters.

[0003] At present, epoxy zinc-rich paint occupies the mainstream application in the anti-corrosion market because it has incomparable advantages over conventional anti-corrosion coatings, mainly manifested in long anti-corrosion life and low shrinkage rate; however, epoxy zinc-rich paint still has a series of problems including: large zinc powder input and low utilization rate, poor substrate adhesion, spray gun clogging during construction, material deposition and high cost, etc. With the continuous development of industrial technology, the demand for anti-corrosion coatings has also been continuously upgraded, and the development of new, efficient and low-cost anti-corrosion coatings is the future development direction.

[0004] Since graphene was successfully stripped from graphite in 2004, its unique and excellent properties have attracted great attention from various industries; as a single-layer or few-layer carbon nanomaterial, graphene can be prepared into a coating or used as a filler in anti-corrosion coatings. Its good electrical conductivity and flaky overlapping barrier properties can shield oxygen and corrosive media, reduce the permeability of the anti-corrosion coating, and thus improve the anti-corrosion performance of the coating. In addition, aromatic resins also have excellent water resistance, acid and alkali resistance, and salt spray resistance, and can be added to the coating system as an additive to enhance the anti-corrosion performance. In view of this, graphene and aromatic resins can be used to develop an anti-corrosion coating with good adhesion, stable anti-corrosion performance, and low cost to solve the problems existing in the existing epoxy zinc-rich paint. Summary of the invention

[0005] In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a graphene and aromatic resin synergistically modified anti-corrosion coating and a preparation method thereof, which utilizes the microscopic synergistic effect of graphene and aromatic resin to effectively improve the anti-corrosion ability of the coating. At the same time, the method of the present invention has the advantages of simple preparation process, good adhesion, stable anti-corrosion performance and low cost.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention provides a graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating, the raw materials of which include component A, component B and component C;

[0008] The component A comprises n-butyl acrylate, styrene, an initiator, a functional monomer and a solvent;

[0009] The B component is an aromatic hydrocarbon resin, and the aromatic hydrocarbon resin accounts for 10 to 30 wt% of the total amount of the A component;

[0010] The C component is graphene slurry, and the graphene in the graphene slurry accounts for 0.5-6wt% of the total amount of the A component.

[0011] Preferably, the component A comprises the following ingredients in mass percentage: 20-40% n-butyl acrylate, 5-20% styrene, 0.1-2% initiator, 3-8% functional monomer, and 40-60% solvent.

[0012] Preferably, the initiator includes one of an inorganic peroxide initiator, an organic peroxide initiator, an azo initiator or a redox initiator, or a composite initiator.

[0013] Preferably, the functional monomer is selected from one or more of glycidyl methacrylate, hydroxyethyl acrylate, and hydroxypropyl methacrylate.

[0014] Preferably, the solvent is selected from one or more of ethyl acetate, toluene, xylene, acetone, dimethyl sulfoxide, ethanol and n-hexane.

[0015] Preferably, the aromatic hydrocarbon resin is selected from one or more of coal-based coumarone resin and oil-based petroleum resin.

[0016] Preferably, the coal-based coumarone resin contains 50-90 wt% indene and 1-5 wt% coumarone.

[0017] Preferably, the graphene slurry consists of graphene, a solvent and a dispersant.

[0018] Preferably, the solvent used in the graphene slurry is selected from one or more of ethyl acetate, toluene, xylene, acetone, dimethyl sulfoxide, ethanol and n-hexane.

[0019] Preferably, in the graphene slurry, the mass fraction of the graphene is 10 to 20 wt%.

[0020] The second aspect of the present invention provides a method for preparing the graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating as described in the first aspect of the present invention, characterized in that it comprises the following steps:

[0021] S1, mixing n-butyl acrylate, styrene, an initiator, a functional monomer and a solvent, and adding the mixture into a reactor to carry out a free radical copolymerization reaction, and obtaining an acrylic coating after the reaction is completed;

[0022] S2, stirring and mixing the acrylic paint and aromatic hydrocarbon resin in proportion to obtain a modified acrylic paint;

[0023] S3, adding the graphene slurry into the modified acrylic paint and dispersing it evenly to obtain a graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion paint.

[0024] Preferably, in the step S1, during the free radical copolymerization reaction, the temperature of the reactor is 50 to 90° C., the stirring rate of the reactor is 200 to 500 r / min, and the reaction time of the free radical copolymerization reaction is 2 to 8 h.

[0025] The graphene and aromatic hydrocarbon resin synergistically modified anticorrosive coating and its preparation method provided by the present invention have the following characteristics:

[0026] Beneficial effects:

[0027] 1. The graphene used in the present invention is flash graphene, which has the characteristics of disordered layers, few defects, low number of layers and excellent electrical properties; the aromatic hydrocarbon resin has the characteristics of excellent water resistance, acid and alkali resistance, and salt spray resistance; since both are conjugated systems in microstructure, they have very good compatibility and can show obvious synergistic effects in the macroscopic sense, thus greatly improving the mechanical and anti-corrosion properties of the coating;

[0028] 2. The present invention improves the composite effect of graphene and aromatic resin by introducing styrene into the acrylic coating system, and at the same time increases the mechanical properties of the coating;

[0029] 3. The introduction of functional monomers in the present invention can improve the compatibility of the coating system;

[0030] 4. The solvent system of the graphene slurry of the present invention is basically consistent with that of the resin substrate, so the composite process of graphene and resin is simple, the graphene is easy to disperse, and the coating performance is stable;

[0031] 5. The present invention has the advantages of simple preparation process, good coating adhesion, stable anti-corrosion performance and low cost. At the same time, it can be compounded with oily coatings currently on the market and is expected to achieve industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0033] Figure 1The present invention is a schematic flow chart of the method for collaboratively preparing anti-corrosion coatings using graphene and aromatic hydrocarbon resins. DETAILED DESCRIPTION

[0034] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with embodiments.

[0035] The graphene and aromatic hydrocarbon resin synergistically modified anticorrosive coating provided by the present invention comprises raw materials including component A, component B and component C; wherein component A comprises n-butyl acrylate, styrene, an initiator, a functional monomer and a solvent; component B is aromatic hydrocarbon resin, which accounts for 10-30wt% of the total amount of component A; and component C is graphene slurry, in which graphene in the graphene slurry accounts for 0.5-6wt% of the total amount of component A.

[0036] Among the raw materials of anti-corrosion coatings modified synergistically with graphene and aromatic resin, component A is used to prepare acrylic coatings; components B and C are used to modify acrylic coatings; aromatic resins have excellent water resistance, acid and alkali resistance, and salt spray resistance; graphene has the characteristics of disordered layers, few defects, low number of layers and excellent electrical properties; both are conjugated systems in microstructure, have good compatibility, and can exhibit obvious synergistic effects on the macroscopic surface. Introducing the above two into the acrylic coating system can greatly enhance the mechanical and anti-corrosion properties of the coating.

[0037] Component A includes the following ingredients in mass percentage: 20-40% n-butyl acrylate, 5-20% styrene, 0.1-2% initiator, 3-8% functional monomer, 40-60% solvent. Under the initiator, n-butyl acrylate, styrene and functional monomer are dispersed in the solvent as reactive monomers and undergo free radical copolymerization to form a long polymer chain as a coating matrix.

[0038] In a specific embodiment, the initiator used in component A includes one or a composite initiator selected from the group consisting of an inorganic peroxide initiator, an organic peroxide initiator, an azo initiator, or a redox initiator.

[0039] In a specific embodiment, the functional monomer used in component A can improve the compatibility of the coating system, and the functional monomer is selected from one or more of glycidyl methacrylate, hydroxyethyl acrylate, and hydroxypropyl methacrylate.

[0040] In a specific embodiment, the solvent used in component A is selected from one or more of ethyl acetate, toluene, xylene, acetone, dimethyl sulfoxide, ethanol, and n-hexane.

[0041] In a specific embodiment, the aromatic hydrocarbon resin of component B is one or more of coal-based coumarone resin and oil-based petroleum resin; wherein the coal-based coumarone resin is a polymerization product of a mixture containing indene, coumarone and other polymerizable components distilled from the heavy benzene fraction of coal tar, after cationic polymerization, and the content of indene in the coal-based coumarone resin is 50-90wt%, and the content of coumarone is 1-5wt%.

[0042] The graphene slurry is composed of graphene, solvent and dispersant. The solvent used in the graphene slurry is basically the same as the solvent used in component A (solvent system of the resin substrate), that is, the solvent used in the graphene slurry is selected from one or more of ethyl acetate, toluene, xylene, acetone, dimethyl sulfoxide, ethanol, and n-hexane; wherein the graphene slurry and component A can use the same solvent, or different solvents (if different solvents are used, the two solvents must be compatible, and the specific choice can be based on the compatibility of the solvents). The dispersant used in the graphene slurry is one or more of sodium dodecylbenzene sulfonate, sodium p-toluenesulfonate, sodium benzenesulfonate, p-hydroxybenzoic acid, and N-methylpyrrolidone. In the graphene slurry, the mass fraction of the dispersant is 0.5-2wt%; the mass fraction of graphene is 10-20wt%. Among them, the graphene can use flash graphene (such as flash graphene prepared by Saiyin New Materials Company), which has the characteristics of chaotic layers, rich raw materials, few defects, and low cost.

[0043] In a specific embodiment, the solid content of the anti-corrosion coating modified synergistically by graphene and aromatic hydrocarbon resin is 40% to 60%.

[0044] Combination Figure 1 As shown, the preparation method of the above-mentioned graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating comprises the following steps:

[0045] S1, mixing n-butyl acrylate, styrene, an initiator, a functional monomer and a solvent, and adding the mixture into a reactor to carry out a free radical copolymerization reaction, and obtaining an acrylic coating after the reaction is completed;

[0046] Specifically, according to the proportion of raw materials in group A, n-butyl acrylate, styrene, initiator, functional monomer and solvent are mixed and added to the reactor, the temperature of the reactor is increased to a specified temperature, stirring is turned on, and the rotation speed is controlled to carry out a free radical copolymerization reaction. After the reaction is completed, stirring and heating are turned off, and the acrylic coating is obtained after standing. During the free radical copolymerization reaction, the temperature of the reactor is 50-90°C, the stirring rate of the reactor is 200-500r / min, and the reaction time of the free radical copolymerization reaction is 2-8h.

[0047] S2, stirring and mixing the acrylic paint and the aromatic resin in proportion to obtain a modified acrylic paint;

[0048] S3, adding the graphene slurry into the modified acrylic paint and dispersing it evenly to obtain the graphene and aromatic resin synergistically modified anti-corrosion paint.

[0049] Specifically, graphene and a dispersant are dispersed in a solvent to obtain graphene slurry, the graphene slurry is added to a modified acrylic paint, and after the graphene slurry is evenly dispersed through mechanical stirring and ultrasonic dispersion, a graphene and aromatic resin synergistically modified anti-corrosion coating is obtained.

[0050] The following is a further introduction to the graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating and its preparation method of the present invention in conjunction with specific examples; in the following embodiments, the dispersant used in the graphene slurry is one or more of sodium dodecylbenzenesulfonate, sodium p-toluenesulfonate, sodium benzenesulfonate, p-hydroxybenzoic acid, and N-methylpyrrolidone, and the mass fraction of the dispersant is 0.5 to 2 wt%.

[0051] Example 1

[0052] The method for preparing the anti-corrosion coating modified by the synergistic combination of graphene and aromatic hydrocarbon resin in this embodiment, wherein the aromatic hydrocarbon resin is coumarone resin, comprises the following steps:

[0053] 1) 30 parts by weight of n-butyl acrylate, 6 parts by weight of styrene, 0.5 parts by weight of dibenzoyl peroxide, 4 parts by weight of hydroxypropyl methacrylate and 50 parts by weight of ethyl acetate were mixed and poured into a reactor;

[0054] 2) Raise the reactor temperature to 75°C, start stirring, control the speed to 350r / min, and the reaction time to 5h. After the reaction is completed, turn off stirring and stop heating, let it stand, and then take out the coating.

[0055] 3) 20 parts by weight of the acrylic paint obtained in step 2 and 2 parts by weight of coumarone resin are stirred and mixed to prepare a coumarone-modified acrylic paint.

[0056] 4) Add 2 parts by weight of graphene slurry to the coumarone modified acrylic paint obtained in step 3, wherein the mass fraction of graphene in the graphene slurry is 10%. After mechanical stirring with a high-speed stirrer, the mixture is dispersed in an ultrasonic dispersant to prepare a graphene and coumarone synergistic modified anti-corrosion paint.

[0057] The anti-corrosion coating modified by graphene and coumarone was sprayed onto the steel plate to prepare an anti-corrosion sample for subsequent performance testing. The test results are shown in Table 1, where the anti-corrosion test method adopted the salt spray resistance performance test.

[0058] Example 2

[0059] The method for preparing the anti-corrosion coating modified by the synergistic combination of graphene and aromatic hydrocarbon resin in this embodiment, wherein the aromatic hydrocarbon resin is coumarone resin, comprises the following steps:

[0060] 1) 25 parts by weight of n-butyl acrylate, 11 parts by weight of styrene, 0.5 parts by weight of dibenzoyl peroxide, 4 parts by weight of hydroxypropyl methacrylate and 50 parts by weight of ethyl acetate were mixed and poured into a reactor;

[0061] 2) Raise the reactor temperature to 75°C, start stirring, control the speed to 350r / min, and the reaction time to 5h. After the reaction is completed, turn off stirring and stop heating, let it stand, and then take out the coating.

[0062] 3) 20 parts by weight of the acrylic paint obtained in step 2 and 2 parts by weight of coumarone resin are stirred and mixed to prepare a coumarone-modified acrylic paint.

[0063] 4) Add 2 parts by weight of graphene slurry to the coumarone-modified acrylic paint obtained in step 3, wherein the mass fraction of graphene in the graphene slurry is 10%. After mechanical stirring with a high-speed stirrer, the mixture is dispersed in an ultrasonic dispersant to prepare a graphene and coumarone synergistic anti-corrosion paint.

[0064] The anti-corrosion coating modified by graphene and coumarone was sprayed onto the steel plate to prepare an anti-corrosion sample for subsequent performance testing. The test results are shown in Table 1, where the anti-corrosion test method adopted the salt spray resistance performance test.

[0065] Example 3

[0066] The method for preparing the anti-corrosion coating modified by the synergistic combination of graphene and aromatic hydrocarbon resin in this embodiment, wherein the aromatic hydrocarbon resin is coumarone resin, comprises the following steps:

[0067] 1) 25 parts by weight of n-butyl acrylate, 11 parts by weight of styrene, 0.5 parts by weight of dibenzoyl peroxide, 4 parts by weight of hydroxypropyl methacrylate and 50 parts by weight of ethyl acetate were mixed and poured into a reactor;

[0068] 2) Raise the reactor temperature to 75°C, start stirring, control the speed to 350r / min, and the reaction time to 5h. After the reaction is completed, turn off stirring and stop heating, let it stand, and then take out the coating.

[0069] 3) 20 parts by weight of the acrylic paint obtained in step 2 and 4 parts by weight of coumarone resin are stirred and mixed to prepare a coumarone-modified acrylic paint.

[0070] 4) Add 4 parts by weight of graphene slurry to the coumarone modified acrylic paint obtained in step 3, wherein the mass fraction of graphene in the graphene slurry is 10%. After mechanical stirring with a high-speed stirrer, the mixture is dispersed in an ultrasonic dispersant to prepare a graphene and coumarone synergistic anti-corrosion coating. Spray the coating onto a steel plate to prepare an anti-corrosion sample for subsequent performance testing.

[0071] The anti-corrosion coating modified by graphene and coumarone was sprayed onto the steel plate to prepare an anti-corrosion sample for subsequent performance testing. The test results are shown in Table 1, where the anti-corrosion test method adopted the salt spray resistance performance test.

[0072] Example 4

[0073] The method for preparing the anti-corrosion coating modified by the synergistic combination of graphene and aromatic hydrocarbon resin in this embodiment, wherein the aromatic hydrocarbon resin is coumarone resin, comprises the following steps:

[0074] 1) 25 parts by weight of n-butyl acrylate, 11 parts by weight of styrene, 0.5 parts by weight of dibenzoyl peroxide, 4 parts by weight of hydroxypropyl methacrylate and 50 parts by weight of ethyl acetate were mixed and poured into a reactor;

[0075] 2) Raise the reactor temperature to 75°C, start stirring, control the speed to 350r / min, and the reaction time to 5h. After the reaction is completed, turn off stirring and stop heating, let it stand, and then take out the coating.

[0076] 3) 20 parts by weight of the acrylic paint obtained in step 2 and 4 parts by weight of coumarone resin are stirred and mixed to prepare a coumarone-modified acrylic paint.

[0077] 4) Add 4 parts by weight of graphene slurry to the coumarone-modified acrylic paint obtained in step 3, wherein the mass fraction of graphene in the graphene slurry is 20%. After mechanical stirring with a high-speed stirrer, the mixture is dispersed in an ultrasonic dispersant to prepare a graphene and coumarone synergistic anti-corrosion paint.

[0078] The anti-corrosion coating modified by graphene and coumarone was sprayed onto the steel plate to prepare an anti-corrosion sample for subsequent performance testing. The test results are shown in Table 1, where the anti-corrosion test method adopted the salt spray resistance performance test.

[0079] Comparative Example 1

[0080] The preparation method of the graphene anticorrosive coating of this comparative example does not use aromatic hydrocarbon resin, and specifically comprises the following steps:

[0081] 1) 25 parts by weight of n-butyl acrylate, 11 parts by weight of styrene, 0.5 parts by weight of dibenzoyl peroxide, 4 parts by weight of hydroxypropyl methacrylate and 50 parts by weight of ethyl acetate were mixed and poured into a reactor;

[0082] 2) Raise the reactor temperature to 75°C, start stirring, control the speed to 350r / min, and the reaction time to 5h. After the reaction is completed, turn off stirring and stop heating, let it stand, and then take out the coating.

[0083] 3) Add 4 parts by weight of graphene slurry to 20 parts by weight of acrylic paint obtained in step 2, wherein the mass fraction of graphene in the graphene slurry is 10%. After mechanical stirring with a high-speed stirrer, the mixture is dispersed in an ultrasonic dispersant to prepare a graphene anticorrosive paint.

[0084] The graphene anti-corrosion coating was sprayed onto the steel plate to prepare an anti-corrosion sample for subsequent performance testing. The test results are shown in Table 1, where the anti-corrosion test method adopted the salt spray resistance performance test.

[0085] Comparative Example 2

[0086] The preparation method of the epoxy zinc-rich anticorrosive coating of this comparative example specifically comprises the following steps:

[0087] I. The preparation method of component A of epoxy zinc-rich anticorrosive coating is:

[0088] 1) Add 16 parts by weight of epoxy resin in component A into a stirring container and stir at a speed of 1000-1500 r / min;

[0089] 2) adding 14 parts by weight of solvent (xylene and isobutyl alcohol are prepared into a mixed solvent at a ratio of 3:1), 35 parts by weight of zinc powder, 1 part by weight of graphene and 34 parts by weight of barium sulfate in sequence, and continuing to stir at a speed of 2000-3000 r / min until the mixture is evenly dispersed;

[0090] 3) adding the mixture obtained in step (2) into a three-stage grinding mill and grinding to 20-60 μm to obtain component A;

[0091] II. The preparation method of component B of epoxy zinc-rich anticorrosive coating is:

[0092] 4) preparing a mixed solvent of xylene and isobutyl alcohol in a weight ratio of 1:1 as the solvent of component B. Sequentially mix the curing agent and the solvent in component B in a weight ratio of 1:1 to obtain component B;

[0093] III. Before use, mix the prepared component A and component B (the mass ratio of component A to component B is 10:1) to obtain the epoxy zinc-rich anti-corrosion coating.

[0094] The epoxy zinc-rich anti-corrosion coating was sprayed onto the steel plate to prepare an anti-corrosion sample for subsequent performance testing. The test results are shown in Table 1, where the anti-corrosion test method adopted the salt spray resistance performance test.

[0095] Table 1 Properties of coatings

[0096] Salt spray resistant Pencil hardness Adhesion Number average molecular weight (g / mol) Example 1 2500h 2H Level 0 94300 Example 2 2500h 3H Level 0 65400 Example 3 3000h 3H Level 1 79800 Example 4 4000h 3H Level 1 67800 Comparative Example 1 2000h 3H Level 0 81700 Comparative Example 2 1000h 2H Level 2 slightly

[0097] As shown in Table 1, compared with Comparative Example 2, the salt spray resistance of the anti-corrosion coating modified by the synergistic effect of graphene and aromatic resin in the embodiments of the present invention is more than 2500h (especially the salt spray resistance in Example 4 reaches 4000h), and the coating has good mechanical properties and adhesion; compared with Comparative Example 1, the anti-corrosion coating modified by the synergistic effect of graphene and aromatic resin in the embodiments of the present invention utilizes the synergistic effect of graphene and aromatic resin, and its anti-corrosion performance far exceeds other acrylic anti-corrosion coatings.

[0098] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating, characterized in that: Its raw materials include component A, component B and component C; The component A comprises n-butyl acrylate, styrene, an initiator, a functional monomer and a solvent; The B component is an aromatic hydrocarbon resin, and the aromatic hydrocarbon resin accounts for 10 to 30 wt% of the total amount of the A component; The C component is graphene slurry, and the graphene in the graphene slurry accounts for 0.5-6wt% of the total amount of the A component.

2. The graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 1, characterized in that: The component A comprises the following ingredients in mass percentage: 20-40% n-butyl acrylate, 5-20% styrene, 0.1-2% initiator, 3-8% functional monomer, and 40-60% solvent.

3. The graphene and aromatic resin synergistically modified anti-corrosion coating according to claim 1, characterized in that: The initiator includes one of an inorganic peroxide initiator, an organic peroxide initiator, an azo initiator or a redox initiator, or a composite initiator.

4. The graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 1, characterized in that: The functional monomer is selected from one or more of glycidyl methacrylate, hydroxyethyl acrylate, and hydroxypropyl methacrylate.

5. The graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 1, characterized in that: The solvent is selected from one or more of ethyl acetate, toluene, xylene, acetone, dimethyl sulfoxide, ethanol, and n-hexane.

6. The graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 1, characterized in that: The aromatic hydrocarbon resin is selected from one or more of coal-based coumarone resin and oil-based petroleum resin.

7. The graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 6, characterized in that: The coal-based coumarone resin has an indene content of 50-90 wt % and a coumarone content of 1-5 wt %.

8. The graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 1, characterized in that: The graphene slurry consists of graphene, a solvent and a dispersant.

9. The graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 8, characterized in that: The solvent used in the graphene slurry is selected from one or more of ethyl acetate, toluene, xylene, acetone, dimethyl sulfoxide, ethanol, and n-hexane.

10. The graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 8, characterized in that: In the graphene slurry, the mass fraction of the graphene is 10-20wt%.

11. A method for preparing the graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to any one of claims 1 to 10, characterized in that: The following steps are involved: S1, mixing n-butyl acrylate, styrene, an initiator, a functional monomer and a solvent, and adding the mixture into a reactor to carry out a free radical copolymerization reaction, and obtaining an acrylic coating after the reaction is completed; S2, stirring and mixing the acrylic paint and aromatic hydrocarbon resin in proportion to obtain a modified acrylic paint; S3, adding the graphene slurry into the modified acrylic paint and dispersing it evenly to obtain a graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion paint.

12. The method for preparing the graphene and aromatic hydrocarbon resin synergistically modified anti-corrosion coating according to claim 11, characterized in that: In the step S1, during the free radical copolymerization reaction, the temperature of the reactor is 50 to 90° C., the stirring rate of the reactor is 200 to 500 r / min, and the reaction time of the free radical copolymerization reaction is 2 to 8 h.

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