Heavy-duty anti-corrosion coatings, their preparation methods and applications, and methods for preparing anti-corrosion coatings.

Abstract

The application relates to the field of metal corrosion prevention, and discloses heavy-duty anticorrosive paint, a preparation method and application thereof, and a method for preparing an anticorrosive coating. The preparation method of the heavy-duty anticorrosive paint comprises the following steps: (1) carrying out a first reaction on 2-amino-4-hydroxy-6-methyl pyrimidine and hexamethylene diisocyanate to obtain a reactant I; (2) carrying out a second reaction on the reactant I and hydroxyl silicone oil in the presence of a solvent and a catalyst to obtain a reactant II; the mass ratio of the reactant I to the hydroxyl silicone oil is 1:50-100; (3) carrying out a first mixing on the reactant II, a curing agent, a defoaming agent and a leveling agent to obtain the heavy-duty anticorrosive paint; wherein, in the step (2), the second reaction is carried out under the conditions that the temperature is 50-80 DEG C and the time is 9-18 h. The heavy-duty anticorrosive paint provided by the application has strong durability, good temperature resistance and self-healing property.

Description

Technical Field

[0001] This invention relates to the field of metal corrosion protection, specifically to heavy-duty anti-corrosion coatings, their preparation methods and applications, and methods for preparing anti-corrosion coatings. Background Technology

[0002] Carbon steel has advantages such as high strength, high hardness, good mechanical properties, and ease of processing, and is widely used in aerospace, automotive, shipbuilding and other fields.

[0003] Although carbon steel itself has better corrosion resistance than some other metals, it is susceptible to different types of corrosion during use, especially in humid environments, with localized corrosion being the most common.

[0004] To improve the corrosion resistance of carbon steel, protective coatings are often applied to its surface. However, most coatings inevitably develop defects such as cracks or micropores during use due to the influence of complex external environments. This exposes the damaged metal substrate to the environment, leading to contact with corrosive media and ultimately corrosion of the metal substrate.

[0005] CN113185899A discloses a self-healing epoxy coating at room temperature. The preparation method of the epoxy coating includes the following steps: 1) Synthesis of D400-UPy: 6-methylpyrimidine is completely dissolved in a solvent, and N,N' is added. - Carbonyl diimidazole mixture was stirred at high temperature for 1.5-2.5 hours; subsequently, the product was cooled to 24-26°C and filtered using a Buchner funnel; the resulting white powder was washed five times with ethanol and dried under vacuum at 28-32°C for 1.5-2.5 hours; the white powder was dispersed in D400 under a nitrogen atmosphere and stirred at 40°C for 46-50 hours, then cooled to 24-26°C; subsequently, the mixture was added to n-hexane at 5°C; the light yellow oily liquid separated at the bottom was collected with an appropriate amount of solvent and The mixture was diluted and then washed three times with saturated brine and deionized water. The resulting liquid was dried in anhydrous sodium sulfate and filtered through filter paper. Residual chloroform in the mixture was removed by rotary evaporation and dried under vacuum overnight to obtain the final product D400-UPy. 2) Preparation of self-healing epoxy coating: D400-UPy, epoxy resin E51, and D400 were stirred in proportion for 20 minutes. The mixture was then coated onto a Q235 steel substrate using a coating rod and cured at high temperature to obtain a self-healing epoxy coating. However, this preparation method is time-consuming and cumbersome, and the self-healing coating prepared from epoxy resin as the matrix has poor temperature resistance, which cannot meet the requirements for applications at higher temperatures.

[0006] Therefore, in response to the existing problems, there is an urgent need to develop an anti-corrosion coating for carbon steel that can achieve self-repair of damaged areas. Summary of the Invention

[0007] The purpose of this invention is to provide an anti-corrosion coating that is durable, has good temperature resistance, and is self-healing.

[0008] To achieve the above objectives, a first aspect of the present invention provides a method for preparing a heavy-duty anti-corrosion coating, the method comprising:

[0009] (1) 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate were reacted to obtain reactant I;

[0010] (2) In the presence of a solvent and a catalyst, reactant I and hydroxyl silicone oil are subjected to a second reaction to obtain reactant II; the mass ratio of reactant I to hydroxyl silicone oil is 1:50-100; the dynamic viscosity of hydroxyl silicone oil at 25°C is 5000-15000 mPa·s.

[0011] (3) The reactant II is first mixed with the curing agent, defoamer and leveling agent to obtain the heavy-duty anti-corrosion coating;

[0012] In step (2), the conditions for the second reaction include a temperature of 50-80°C and a time of 9-18 hours.

[0013] A second aspect of the present invention provides a heavy-duty anti-corrosion coating prepared by the method described in the first aspect above.

[0014] A third aspect of the present invention provides the application of the heavy-duty anti-corrosion coating described in the second aspect above in the field of metal corrosion protection.

[0015] A fourth aspect of the present invention provides a method for preparing an anti-corrosion coating, the method comprising: applying a heavy-duty anti-corrosion coating onto the surface of a substrate material and then performing a curing treatment to form a substrate containing the anti-corrosion coating;

[0016] The heavy-duty anti-corrosion coating is the heavy-duty anti-corrosion coating described in the second aspect above.

[0017] The technical solution provided by this invention has at least the following advantages compared to the prior art:

[0018] (1) The heavy-duty anti-corrosion coating provided by the present invention can achieve self-repair. It only takes a few minutes to repair scratches, and only tens of seconds to repair minor scratches at room temperature.

[0019] (2) The heavy-duty anti-corrosion coating provided by the present invention has excellent performance with strong durability and good temperature resistance, and can play a long-term protective role for metals. When carbon steel is immersed in 3.5wt.% NaCl solution for 180 days, the carbon steel is still not corroded.

[0020] (3) The heavy-duty anti-corrosion coating provided by the present invention forms a dense coating on the metal surface with a large resistance, which can inhibit the metal's electrochemical corrosion reaction and thus has good corrosion resistance. In addition, the coating has good adhesion to the substrate, and the adhesion level with carbon steel substrate is 0. During service, the coating can maintain its integrity for a long time and can provide long-term protection for carbon steel.

[0021] (4) The preparation process of this invention is simple and time-saving. Attached Figure Description

[0022] Figure 1 This is a graph showing the test results of the anti-corrosion coating adhesion of carbon steel material C1-2 after curing treatment;

[0023] Figure 2 These are electrochemical impedance diagrams of the anti-corrosion coating on carbon steel material C1 before and after 100 days of immersion, after curing treatment.

[0024] Figure 3 These are images showing the state of carbon steel materials C1-1 and DC1 after durability testing following curing treatment. Figure 3 The left part of the image shows the condition of carbon steel material C1-1 after durability testing. Figure 3 The right side of the image shows the condition of carbon steel material DC1 after a durability test. Detailed Implementation

[0025] 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.

[0026] In this invention, a silane coupling agent is used as a curing agent.

[0027] As previously described, a first aspect of the present invention provides a method for preparing a heavy-duty anti-corrosion coating, the method comprising:

[0028] (1) 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate were reacted to obtain reactant I;

[0029] (2) In the presence of a solvent and a catalyst, reactant I and hydroxyl silicone oil are subjected to a second reaction to obtain reactant II; the mass ratio of reactant I to hydroxyl silicone oil is 1:50-100; the dynamic viscosity of hydroxyl silicone oil at 25°C is 5000-15000 mPa·s.

[0030] (3) The reactant II is first mixed with the curing agent, defoamer and leveling agent to obtain the heavy-duty anti-corrosion coating;

[0031] In step (2), the conditions for the second reaction include a temperature of 50-80°C and a time of 9-18 hours.

[0032] Preferably, in step (3), the amount of curing agent is 1-5 parts by weight, the amount of defoamer is 0.5-3 parts by weight, and the amount of leveling agent is 0.5-3 parts by weight relative to 100 parts by weight of reactant II.

[0033] More preferably, in step (3), the amount of the curing agent is 1.5-4 parts by weight, the amount of the defoamer is 0.8-2 parts by weight, and the amount of the leveling agent is 0.8-2 parts by weight, relative to 100 parts by weight of reactant II. The inventors have found that, in this preferred embodiment, the heavy-duty anti-corrosion coating provided by the present invention has superior adhesion and superior self-healing properties.

[0034] In a preferred embodiment, in step (1), the mass ratio of the 2-amino-4-hydroxy-6-methylpyrimidine to the hexamethylene diisocyanate is 1:8-15, more preferably 1:10-14.

[0035] Preferably, in step (1), the conditions for the first reaction include: a temperature of 80-110°C and a time of 16-26 hours.

[0036] More preferably, in step (1), the conditions for the first reaction include: a temperature of 85-100°C and a time of 18-24 hours. The inventors of this invention have discovered that, under this preferred condition, the heavy-duty anti-corrosion coating provided by this invention exhibits superior temperature resistance.

[0037] To obtain a heavy-duty anti-corrosion coating with better self-healing properties, preferably, in step (1), after the first reaction, the obtained reactants are washed and dried to obtain reactant I. The present invention does not have special requirements for the washing process; any washing method known in the art is acceptable. Exemplarily, the present invention uses n-hexane for washing.

[0038] Preferably, the drying conditions include: a vacuum of -0.08 MPa to -0.1 MPa, a temperature of 40-80°C, and a time of 24-48 hours.

[0039] In a preferred embodiment, in step (2), the catalyst is dibutyltin dilaurate.

[0040] Preferably, in step (2), the amount of catalyst is 0.05-0.2 wt%, based on the total amount of reactant I and hydroxyl silicone oil.

[0041] Preferably, in step (2), the solvent is chloroform and / or butyl acetate.

[0042] In a preferred embodiment, in step (2), the amount of solvent used is 30-100 mL relative to 1 g of reactant I.

[0043] Preferably, in step (2), the mass ratio of reactant I to the hydroxyl silicone oil is 1:60-90. The inventors of this invention have discovered that, under this preferred condition, the heavy-duty anti-corrosion coating provided by this invention exhibits superior durability and temperature resistance.

[0044] In a preferred embodiment, in step (2), the conditions for the second reaction include a temperature of 60-70°C and a time of 11-15 hours. The inventors of this invention have discovered that, under this preferred embodiment, the heavy-duty anti-corrosion coating provided by this invention exhibits superior adhesion and superior self-healing properties.

[0045] It should be noted that in step (2), the second reaction is carried out under stirring conditions. The present invention does not have special requirements for the stirring rate, and any stirring rate known in the art can be used. For example, the stirring rate is 500-800 rpm.

[0046] In a preferred embodiment, in step (3), the curing agent is selected from at least one of silane coupling agent KH550, silane coupling agent KH560 and silane coupling agent KH570.

[0047] Preferably, in step (3), the defoamer is selected from at least one of polydimethylsiloxane, propylene glycol, and organosilicon compounds;

[0048] In a preferred embodiment, in step (3), the leveling agent is selected from at least one of polyether-modified polydimethylsiloxane, polyester-modified polymethylalkylsiloxane, and aralkyl-modified polymethylalkylsiloxane.

[0049] As previously stated, a second aspect of the present invention provides a heavy-duty anti-corrosion coating prepared by the method described in the first aspect.

[0050] As previously stated, a third aspect of the present invention provides the application of the heavy-duty anti-corrosion coating described in the second aspect in the field of metal corrosion protection.

[0051] As mentioned above, a fourth aspect of the present invention provides a method for preparing an anti-corrosion coating, the method comprising: applying a heavy-duty anti-corrosion coating onto the surface of a substrate material and then performing a curing treatment to form a substrate containing the anti-corrosion coating;

[0052] The heavy-duty anti-corrosion coating is the heavy-duty anti-corrosion coating described in the second aspect above.

[0053] According to a particularly preferred embodiment, the operation of applying a heavy-duty anti-corrosion coating to the surface of a substrate material includes:

[0054] (S1) Grind the surface of the substrate material to remove impurities and oxide film from the surface of the substrate material, and then rinse the ground substrate material to obtain a pretreated substrate material.

[0055] (S2) Apply the heavy-duty anti-corrosion coating to the surface of the pretreated substrate material using a coating applicator.

[0056] Preferably, the matrix material is a metallic material.

[0057] More preferably, the matrix material is carbon steel.

[0058] In a preferred embodiment, the curing conditions include a temperature of 60-150°C and a time of 0.5-4 hours.

[0059] More preferably, the curing conditions include a temperature of 80-130°C and a time of 1.5-2.5 hours. The inventors of this invention have discovered that, under this preferred condition, the adhesion between the anti-corrosion coating and the substrate material is stronger.

[0060] Preferably, the thickness of the anti-corrosion coating is 40-200 μm.

[0061] The present invention will be described in detail below through examples. Unless otherwise specified, the instruments, reagents, and materials involved in the following examples are all conventional instruments, reagents, and materials, which can be obtained through legitimate commercial channels. Unless otherwise stated, all reagents used are commercially available analytical grade products.

[0062] 2-Amino-4-hydroxy-6-methylpyrimidine: purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0063] Hexamethylene diisocyanate: purchased from Shanghai Maclean Biochemical Technology Co., Ltd.;

[0064] Solvent: chloroform, purchased from Xilong Scientific Co., Ltd.;

[0065] Catalyst: Dibutyltin dilaurate, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0066] Hydroxyl silicone oil I: dynamic viscosity at 25°C is 8000 mPa·s, purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd.

[0067] Hydroxyl silicone oil II: dynamic viscosity at 25°C is 15000 mPa·S, purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd.

[0068] Hydroxysilicone oil III: dynamic viscosity at 25°C is 1000 mPa·S, purchased from Shenzhen Jipeng Silicon Fluorine Materials Co., Ltd.

[0069] Curing agent I: Silane coupling agent KH550, purchased from Shanghai Maclean Biochemical Technology Co., Ltd.;

[0070] Curing agent II: Polyetheramine, brand name D230, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0071] Defoamer: Organosilicon, brand name MOK-6020, purchased from Suzhou Qicaishi Composite Materials Co., Ltd.

[0072] Leveling agent: polyether modified polydimethylsiloxane, brand name BYK300, purchased from BYK Additives (Shanghai) Co., Ltd.

[0073] Base material: carbon steel, grade Q235, purchased from China Baowu Steel Group Co., Ltd.

[0074] Unless otherwise specified, all ingredient amounts in the following examples are by weight, and each by weight represents 1g.

[0075] Example 1

[0076] (1) 2-Amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate were subjected to a first reaction. The resulting reactant was washed with n-hexane (5 times in total, 20 mL of n-hexane each time) and dried to obtain reactant I. The drying conditions were: vacuum degree of -0.09 MPa, temperature of 60 °C, and time of 36 h.

[0077] (2) In the presence of a solvent and a catalyst, reactant I and hydroxyl silicone oil are subjected to a second reaction to obtain reactant II;

[0078] (3) The above reactant II is mixed with curing agent, defoamer and leveling agent to obtain heavy-duty anti-corrosion coating T1.

[0079] The specific types, amounts, and process parameters of raw materials in Example 1 are shown in Table 1. Unless otherwise specified, the other examples follow the same process as Example 1, except that the types, amounts, and process parameters of raw materials used are different, as detailed in Table 1.

[0080] Table 1

[0081]

[0082]

[0083] Example 4

[0084] This embodiment uses a method similar to that of Embodiment 1. The difference is that the amount of curing agent I in step (3) of this embodiment is adjusted to 6 parts by weight to obtain heavy-duty anti-corrosion coating T4.

[0085] Example 5

[0086] This embodiment uses a method similar to that of Embodiment 1, except that the amount of hexamethylene diisocyanate in step (1) of this embodiment is adjusted to 7 parts by weight to obtain heavy-duty anti-corrosion coating T5.

[0087] Example 6

[0088] This embodiment uses a method similar to that of Example 1. The difference is that in step (3) of this embodiment, the same amount of curing agent II as in Example 1 is used to obtain heavy-duty anti-corrosion coating T6.

[0089] Comparative Example 1

[0090] This comparative example was carried out using a method similar to that of Example 1. The difference was that the amount of hydroxyl silicone oil I in step (2) of this comparative example was adjusted to 210 parts by weight to obtain heavy-duty anti-corrosion coating DT1.

[0091] Comparative Example 2

[0092] This comparative example was carried out using a method similar to that of Example 1. The difference is that in step (2) of this comparative example, hydroxyl silicone oil III of the same weight as in Example 1 was used to obtain heavy-duty anti-corrosion coating DT2.

[0093] Comparative Example 3

[0094] This comparative example was carried out using a method similar to that of Example 1. The difference was that the temperature of the second reaction in step (2) of this comparative example was adjusted to 90°C to obtain the heavy-duty anti-corrosion coating DT3.

[0095] Test case

[0096] Carbon steel materials were polished using silicon carbide sandpaper to remove impurities and oxide films from the surface. The polished carbon steel materials were then rinsed until the surface was free of foreign matter, resulting in pretreated carbon steel materials. Heavy-duty anti-corrosion coatings T1, T2, T3, T4, T5, T6, DT1, DT2, and DT3 obtained in the above example were applied to the surface of the pretreated carbon steel materials using a coating applicator. The coatings were then cured at 120°C for 2 hours to form a 55μm thick anti-corrosion coating, resulting in cured carbon steel materials C1-1, C2, C3, C4, C5, C6, DC1, DC2, and DC3, respectively.

[0097] The heavy-duty anti-corrosion coating T1 obtained in the above example was applied to the surface of the pretreated carbon steel material and then cured at 80°C for 2.5 hours to form a 70μm thick anti-corrosion coating, resulting in the cured carbon steel material C1-2. The adhesion between the coating and the carbon steel material was tested using the manual cross-cut test according to the national standard GB9286-2021. The results are as follows. Figure 1 As shown.

[0098] The corrosion resistance was tested using electrochemical impedance spectroscopy (EIS) in a 3.5 wt.% NaCl solution. A Gamry Reference 600 electrochemical workstation was used, and the test system was a three-electrode system, with the cured carbon steel material as the working electrode, a saturated calomel electrode as the reference electrode, and a platinum sheet as the counter electrode. The corrosive medium was a 3.5 wt.% NaCl solution, and the operating temperature was 25 ± 2 °C. The open-circuit potential was tested first, and after the open-circuit potential stabilized, the EIS was tested. The EIS test range was 100,000 Hz - 0.01 Hz, with an amplitude of 10 mV. The coating impedance value was obtained from this; a higher impedance value indicates a slower corrosion rate and better corrosion resistance. This invention exemplarily tested the corrosion resistance of cured carbon steel material C1 before and after immersion in a 3.5 wt.% NaCl solution for 100 days. The test results are as follows: Figure 2 As shown.

[0099] Durability, thermal decomposition temperature and repair efficiency were tested on the cured carbon steel materials C1-1, C2, C3, C4, C5, C6, DC1, DC2 and DC3 respectively. The specific test results are shown in Table 2.

[0100] Durability was tested according to GB / T 1771-2007 "Standard for Determination of Resistance to Neutral Salt Spray of Paints and Varnishes", using a precision salt spray test chamber ASR-90A manufactured by Guangdong Aisrui Instrument Technology Co., Ltd. The temperature inside the test chamber was 35±2℃, and the appearance of the samples was observed after 30 days of testing. This invention exemplarily provides state diagrams of C1-1 and DC1 after the durability test, see... Figure 3 .

[0101] The method for testing the thermal decomposition temperature is as follows: using a Shimadzu DTG-60 instrument, with an atmosphere of N2, and a heating rate of 20℃·min. -1 Thermogravimetric analysis was conducted at temperatures ranging from 40℃ to 600℃.

[0102] The test method for repair efficiency is as follows: A WDL-5000 instrument manufactured by Yangzhou Daochun Testing Machine Factory is used to perform a tensile test on the sample that has undergone the cut-and-repair process, and the results are compared with those of the original sample. The tensile rate used in the test is 500 mm·min. -1 .

[0103] Table 2

[0104] Durability (based on salt spray test) Thermal decomposition temperature (°C) Repair efficiency (%) C1-1 No corrosion observed after 30 days 360 92.2 C2 No corrosion observed after 30 days 366.2 90.8 C3 No corrosion observed after 30 days 358 91.8 C4 Pitting occurred after 30 days 346.2 86.3 C5 No corrosion observed after 30 days 352.7 86.5 C6 No corrosion observed after 30 days 345.9 84.9 DC1 Pitting occurred after 30 days 310.9 69.1 DC2 Multiple pitting corrosions appeared within 30 days. 321.1 59.4 DC3 Multiple pitting corrosions appeared within 30 days. 296.8 78.2

[0105] As can be seen from the results in Table 2, the heavy-duty anti-corrosion coating provided by the present invention has superior durability, temperature resistance and self-healing properties.

[0106] from Figure 1 The results show that the bonding strength between the anti-corrosion coating formed by the carbon steel material C1-2 after curing treatment and the carbon steel is level 0, which is the highest level. This indicates that the coating has good bonding strength with the carbon steel and can well guarantee the long-term service performance of the coating.

[0107] from Figure 2 It can be seen that the corrosion resistance of carbon steel material C1 after immersion in curing treatment is not significantly different from that before immersion, indicating that C1 has excellent corrosion resistance and durability.

[0108] Figure 3 The left part of the image shows the condition of carbon steel material C1-1 after durability testing. Figure 3 The right side of the image shows the condition of carbon steel material DC1 after durability testing. Figure 3 It can be seen that the substrate coated with the heavy-duty anti-corrosion coating provided by the present invention did not show corrosion, while the substrate not coated with the heavy-duty anti-corrosion coating provided by the present invention showed corrosion.

[0109] 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 process for the preparation of heavy-duty coatings, characterized in that, The method comprises: (1) performing a first reaction of 2-amino-4-hydroxy-6-methylpyrimidine and hexamethylene diisocyanate to obtain a reactant I; (2) performing a second reaction of the reactant I and a hydroxyl silicone oil in the presence of a solvent and a catalyst to obtain a reactant II; the mass ratio of the reactant I to the hydroxyl silicone oil is 1:50-100; the dynamic viscosity of the hydroxyl silicone oil at 25°C is 5000-15000 mPa·S; (3) performing a first mixing of the reactant II, a curing agent, a defoaming agent and a leveling agent to obtain the heavy-duty anticorrosive coating. In step (2), the conditions of the second reaction include: a temperature of 50-80°C and a time of 9-18h.

2. The method of claim 1, wherein, In step (3), the amount of the curing agent is 1-5 parts by weight, the amount of the defoaming agent is 0.5-3 parts by weight, and the amount of the leveling agent is 0.5-3 parts by weight, relative to 100 parts by weight of the reactant II.

3. The method of claim 1 or 2, wherein, In step (1), the mass ratio of the 2-amino-4-hydroxy-6-methylpyrimidine to the hexamethylene diisocyanate is 1:8-15.

4. The method of claim 1 or 2, wherein, In step (1), the conditions of the first reaction include: a temperature of 80-110°C and a time of 16-26h.

5. The method of claim 1 or 2, wherein, In step (2), the catalyst is dibutyltin dilaurate; and / or, in step (2), the amount of the catalyst is 0.05-0.2wt%, based on the total amount of the reactant I and the hydroxyl silicone oil; and / or, in step (2), the solvent is chloroform and / or butyl acetate.

6. The method of claim 1 or 2, wherein, In step (3), the curing agent is selected from at least one of silane coupling agent KH550, silane coupling agent KH560 and silane coupling agent KH570.

7. A heavy-duty anticorrosive coating prepared by the method of any one of claims 1-6.

8. The use of the heavy-duty anticorrosive coating of claim 7 in the field of metal corrosion protection.

9. A method of preparing a corrosion protective coating, characterized in that, The method comprises: performing a curing treatment on a surface of a base material after the heavy-duty anticorrosive coating is applied to the surface to form a base material containing an anticorrosive coating; The heavy-duty anticorrosive coating is the heavy-duty anticorrosive coating of claim 7.

10. The method of claim 9, wherein, The base material is a metal material; and / or, the conditions of the curing treatment include: a temperature of 60-150°C and a time of 0.5-4h.

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