Quick-drying water-based anticorrosive paint and preparation method thereof

Abstract

The invention relates to the field of coatings, in particular to a quick-drying water-based anticorrosive coating and a preparation method thereof.The water-based anticorrosive coating is prepared from, by weight, 100 parts of water-based epoxy resin emulsion, 18-32 parts of filler, 1.2-2.4 parts of dispersing agent, 0.6-1.8 parts of flatting agent, 0.5-1.5 parts of defoaming agent, 0.2-1 part of flash rust inhibitor, 25-45 parts of curing agent and 20-30 parts of water. The curing agent prepared by the preparation method disclosed by the invention not only solves the problem of slow drying speed of a waterborne epoxy coating on the market at room temperature, but also has better performances in the aspects of hardness, impact resistance, corrosion resistance and the like.

Description

Technical Field

[0001] The invention relates to the field of coatings, and in particular to a quick-drying water-based anti-corrosion coating and a preparation method thereof. Background Art

[0002] Petroleum steel pipes mainly include oil drilling pipes, oil casings, pumping pipes, etc. Newly produced steel pipes and factory-refurbished steel pipes need to be coated with a layer of hard film anti-rust oil, that is, a layer of anti-corrosion paint. Currently, the commonly used anti-corrosion paint for petroleum steel pipes is mostly solvent-based anti-corrosion paint, but due to environmental protection requirements, it is gradually replaced by water-based anti-corrosion paint. In recent years, water-based epoxy coatings have been increasingly widely used in the field of petroleum steel pipe coating due to their low volatile organic compounds, good adhesion on steel substrates, and good corrosion resistance.

[0003] The performance of waterborne epoxy coatings is affected by factors such as temperature, humidity, coating thickness, and degree of curing reaction during the drying process. After waterborne epoxy is mixed with a curing agent and applied to the metal surface, under normal drying conditions, it can generally reach surface dryness within 30 minutes, that is, 80%-90% of the water can evaporate from the coating, but the remaining 10%-20% of the water evaporates very slowly, and it takes 24 hours to completely dry; in addition, if the humidity is relatively high during construction or the coating is too thick to form a water retardation problem, the surface of the coating can dry quickly, but the internal moisture volatilization is limited by the surface drying coating, which not only leads to a significant extension of the drying time, but also the insufficient internal curing makes it difficult to form a dense coating, thereby affecting the quality of the coating and the long-term anti-corrosion effect. Therefore, it is extremely important to have a waterborne anti-corrosion coating that can be used on petroleum steel pipes and can dry quickly as a whole. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a quick-drying water-based anti-corrosion coating and a preparation method thereof.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] In a first aspect, the present invention provides a quick-drying water-based anti-corrosion coating, which comprises the following components in parts by weight:

[0007] 100 parts of waterborne epoxy resin emulsion, 18-32 parts of filler, 1.2-2.4 parts of dispersant, 0.6-1.8 parts of leveling agent, 0.5-1.5 parts of defoamer, 0.2-1 parts of anti-flash rust agent, 25-45 parts of curing agent and 20-30 parts of water.

[0008] Preferably, the preparation method of the waterborne epoxy resin emulsion comprises:

[0009] Weigh the emulsifier and epoxy resin and mix them in a reaction container, heat to 60-80°C, and after fully dispersing them evenly, pour them into a high-speed shearing machine for high-speed shearing and dispersion. During this period, distilled water is continuously added until the solid content of the epoxy resin is 45%-55%, and then continue to shear for 20-30 minutes to obtain a water-based epoxy resin emulsion.

[0010] More preferably, the epoxy resin is a bisphenol A epoxy resin, including at least one of E-51, E-41, and E-20.

[0011] More preferably, the emulsifier is a mixture of octylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 1:0.6-1.2, and the amount of the emulsifier added is 5%-15% of the mass of the epoxy resin.

[0012] More preferably, the speed of the high-speed shearing is 6000-10000 r / min, and the dropping speed of the distilled water is 5-15 g / min.

[0013] Preferably, the filler is at least one of titanium dioxide, talcum powder, mica powder, and zinc phosphate, and the particle size is 10±2 μm. More preferably, the filler is titanium dioxide and mica powder in a mass ratio of 1-5:1.

[0014] Preferably, the leveling agent is at least one of BYK-345, BYK-346 and BYK-349.

[0015] Preferably, the dispersant is at least one of BYK-190, BYK-192 and BYK-194.

[0016] Preferably, the defoaming agent is at least one of AFE-7610, AFE-1247, and AFE-1410.

[0017] Preferably, the flash rust inhibitor is at least one of ammonium molybdate, sodium molybdate, ammonium benzoate, sodium benzoate, and benzotriazole, and more preferably ammonium benzoate.

[0018] Preferably, the preparation method of the curing agent comprises:

[0019] S1. Add anhydrous ethanol to the reaction bottle, then add 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole, stir evenly at room temperature, then add a photoinitiator, introduce nitrogen to replace the air, and stir again to obtain a mixed reaction liquid;

[0020] S2. Place the reaction bottle under an ultraviolet light source, stir the reaction during the irradiation process, stop stirring after the reaction is completed and remove the light source, and perform rotary evaporation on the reaction solution to remove the solvent to obtain a curing agent.

[0021] Preferably, in S1, the mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinylimidazole and anhydrous ethanol is (0.16-0.32) g: (0.1-0.2) g: (10-30) mL.

[0022] Preferably, in S1, the photoinitiator is benzoin dimethyl ether or benzoin diethyl ether, and the added amount is 3.5%-7.5% of the mass of 5-amino-2-mercaptobenzimidazole.

[0023] Preferably, in S2, the power of the ultraviolet light is 80-160W and the wavelength is 300-400nm.

[0024] Preferably, in S2, the stirring speed of the reaction is 150-350 r / min, and the reaction time is 10-40 min.

[0025] In a second aspect, the present invention provides a method for preparing a quick-drying water-based anti-corrosion coating, comprising the following steps:

[0026] Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring them thoroughly to obtain component A;

[0027] Step 2, mixing the curing agent and water, and stirring them thoroughly to obtain component B;

[0028] Step 3, gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.

[0029] The beneficial effects of the present invention are:

[0030] 1. The present invention prepares a quick-drying water-based anti-corrosion coating. The coating adopts an epoxy system with excellent anti-corrosion performance and uses water as a dispersion medium instead of traditional organic solvents, which greatly reduces the emission of volatile organic compounds (VOCs) and meets green environmental protection requirements.

[0031] 2. The coating prepared by the present invention adopts a homemade curing agent, which uses 5-amino-2-mercaptobenzimidazole and N-vinylimidazole as raw materials and is prepared through a thiol-double bond click chemistry reaction. The obtained curing agent contains a large amount of amino groups, imidazole groups, benzimidazole groups and thioether groups, which has a good promoting effect on the low-temperature curing of epoxy resin.

[0032] 3. The curing agent prepared by the present invention has strong hydrophilicity and can be directly mixed with water to form a curing agent solution, and then mixed with the resin emulsion; moreover, the curing agent has strong activity and can be cured in a humid or low temperature environment, and no additional accelerator (such as DMP-30) is required to achieve rapid drying of the water-based coating.

[0033] 4. The curing agent prepared by the present invention not only solves the problem of slow drying speed of water-based epoxy coatings on the market at room temperature, but also the obtained coating has better performance in hardness, impact resistance and corrosion resistance. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is described below through specific examples. It should be understood that the one or more method steps mentioned in the present invention do not exclude the existence of other method steps before and after the combination step or the insertion of other method steps between these explicitly mentioned steps; it should also be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to limit the scope of the present invention. The change or adjustment of the relative relationship thereof shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0035] In order to better understand the above technical scheme, the exemplary embodiments of the present invention are described in more detail below. Although exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0036] The present invention will be further described below in conjunction with the following examples.

[0037] Example 1

[0038] A quick-drying water-based anti-corrosion coating, calculated by weight, comprises the following components:

[0039] 100 parts of waterborne epoxy resin emulsion, 25 parts of filler, 1.8 parts of dispersant, 1.2 parts of leveling agent, 1 part of defoamer, 0.6 parts of anti-flash rust agent, 35 parts of curing agent and 25 parts of water.

[0040] Wherein, the preparation method of waterborne epoxy resin emulsion comprises:

[0041] Weigh octylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 1:0.8 to obtain an emulsifier, mix the emulsifier and bisphenol A epoxy resin E-51 in a reaction container, the amount of the emulsifier added is 10% of the mass of the epoxy resin, heat to 70°C, fully disperse evenly, pour into a high-speed shearing machine, disperse under a high-speed shearing of 8000r / min, continuously add distilled water at a dropping speed of 10g / min, add until the solid content of the epoxy resin is 50%, and then continue shearing for 25min to obtain an aqueous epoxy resin emulsion.

[0042] Among them, the filler is titanium dioxide and mica powder in a mass ratio of 3:1, and the particle size is 10±2μm; the leveling agent is BYK-346; the dispersant is BYK-192; the defoaming agent is AFE-7610; and the anti-flash rust agent is ammonium benzoate.

[0043] Wherein, the preparation method of the curing agent comprises:

[0044] S1. Add anhydrous ethanol to a reaction vessel, and then add 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole, the mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinyl imidazole and anhydrous ethanol is 0.24g:0.15g:20mL, stir evenly at room temperature, then add a photoinitiator benzoin diethyl ether, the addition amount is 5.5% of the mass of 5-amino-2-mercaptobenzimidazole, nitrogen is introduced to replace the air, and the mixture is fully stirred again to obtain a mixed reaction liquid;

[0045] S2. Place the reaction container under an ultraviolet light source with a power of 120 W and a wavelength of 365 nm. Stir at a speed of 250 r / min during irradiation. After reacting for 30 minutes, stop stirring and remove the light source. Rotary evaporate the reaction solution to remove the solvent to obtain a curing agent.

[0046] The preparation method of the quick-drying water-based anticorrosive coating comprises the following steps:

[0047] Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring them thoroughly to obtain component A;

[0048] Step 2, mixing the curing agent and water, and stirring them thoroughly to obtain component B;

[0049] Step 3, gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.

[0050] Example 2

[0051] A quick-drying water-based anti-corrosion coating, calculated by weight, comprises the following components:

[0052] 100 parts of waterborne epoxy resin emulsion, 18 parts of filler, 1.2 parts of dispersant, 0.6 parts of leveling agent, 0.5 parts of defoamer, 0.2 parts of anti-flash rust agent, 25 parts of curing agent and 20 parts of water.

[0053] Wherein, the preparation method of waterborne epoxy resin emulsion comprises:

[0054] Weigh octylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 1:0.6 to obtain an emulsifier, mix the emulsifier and bisphenol A epoxy resin E-41 in a reaction container, the emulsifier is added in an amount of 5% of the mass of the epoxy resin, heat to 60°C, fully disperse evenly, pour into a high-speed shearing machine, disperse under a high-speed shearing of 6000r / min, continuously add distilled water at a dropping speed of 5g / min, add until the solid content of the epoxy resin is 45%, and then continue shearing for 20min to obtain an aqueous epoxy resin emulsion.

[0055] Among them, the filler is titanium dioxide; the leveling agent is BYK-345; the dispersant is BYK-190; the defoamer is AFE-1247; and the anti-flash rust agent is ammonium molybdate.

[0056] Wherein, the preparation method of the curing agent comprises:

[0057] S1. Add anhydrous ethanol to a reaction vessel, and then add 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole, the mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinyl imidazole and anhydrous ethanol is 0.16g:0.1g:10mL, stir evenly at room temperature, then add a photoinitiator benzoin dimethyl ether, the addition amount is 3.5% of the mass of 5-amino-2-mercaptobenzimidazole, nitrogen is introduced to replace the air, and the mixture is fully stirred again to obtain a mixed reaction liquid;

[0058] S2. Place the reaction container under an ultraviolet light source with a power of 80 W and a wavelength of 365 nm. Stir at a speed of 150 r / min during irradiation. After the reaction treatment for 10 minutes, stop stirring and remove the light source. Rotary evaporate the reaction solution to remove the solvent to obtain a curing agent.

[0059] The preparation method of the quick-drying water-based anticorrosive coating comprises the following steps:

[0060] Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring them thoroughly to obtain component A;

[0061] Step 2, mixing the curing agent and water, and stirring them thoroughly to obtain component B;

[0062] Step 3, gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.

[0063] Example 3

[0064] A quick-drying water-based anti-corrosion coating, calculated by weight, comprises the following components:

[0065] 100 parts of waterborne epoxy resin emulsion, 32 parts of filler, 2.4 parts of dispersant, 1.8 parts of leveling agent, 1.5 parts of defoamer, 1 part of anti-flash rust agent, 45 parts of curing agent and 30 parts of water.

[0066] Wherein, the preparation method of waterborne epoxy resin emulsion comprises:

[0067] Weigh octylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 1:1.2 to obtain an emulsifier, mix the emulsifier and epoxy resin E-20 in a reaction container, the emulsifier is added in an amount of 15% of the mass of the epoxy resin, heat to 80°C, fully disperse, pour into a high-speed shearing machine, disperse under a high-speed shearing of 10000r / min, continuously add distilled water at a dropping speed of 15g / min, add until the solid content of the epoxy resin is 55%, and then continue shearing for 30min to obtain an aqueous epoxy resin emulsion.

[0068] The filler is zinc phosphate with a particle size of 10±2 μm; the leveling agent is BYK-349; the dispersant is BYK-194; the defoaming agent is AFE-1410; and the anti-flash rust agent is benzotriazole.

[0069] Wherein, the preparation method of the curing agent comprises:

[0070] S1. Add anhydrous ethanol to a reaction vessel, and then add 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole, the mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinyl imidazole and anhydrous ethanol is 0.32g:0.2g:30mL, stir evenly at room temperature, then add a photoinitiator benzoin dimethyl ether, the addition amount is 7.5% of the mass of 5-amino-2-mercaptobenzimidazole, nitrogen is introduced to replace the air, and the mixture is fully stirred again to obtain a mixed reaction liquid;

[0071] S2. Place the reaction container under an ultraviolet light source with a power of 160W and a wavelength of 400nm. Stir at a speed of 350r / min during irradiation. After the reaction treatment for 40min, stop stirring and remove the light source. Rotary evaporate the reaction solution to remove the solvent to obtain a curing agent.

[0072] The preparation method of the quick-drying water-based anticorrosive coating comprises the following steps:

[0073] Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring them thoroughly to obtain component A;

[0074] Step 2, mixing the curing agent and water, and stirring them thoroughly to obtain component B;

[0075] Step 3, gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.

[0076] Example 4

[0077] A quick-drying water-based anti-corrosion coating, which differs from Example 1 only in that the weight proportions of the components are different.

[0078] Calculated by weight, it includes the following components:

[0079] 100 parts of waterborne epoxy resin emulsion, 21 parts of filler, 1.6 parts of dispersant, 0.9 parts of leveling agent, 0.8 parts of defoamer, 0.4 parts of anti-flash rust agent, 30 parts of curing agent and 25 parts of water.

[0080] Example 5

[0081] A quick-drying water-based anti-corrosion coating, which differs from Example 1 only in that the weight proportions of the components are different.

[0082] Calculated by weight, it includes the following components:

[0083] 100 parts of waterborne epoxy resin emulsion, 28 parts of filler, 2.1 parts of dispersant, 1.2 parts of leveling agent, 1.1 parts of defoamer, 0.7 parts of anti-flash rust agent, 32 parts of curing agent and 25 parts of water.

[0084] Comparative Example 1

[0085] A quick-drying water-based anticorrosive coating is different from Example 1 only in that the curing agent is different. In this comparative example, the curing agent is replaced by 5-amino-2-mercaptobenzimidazole.

[0086] Comparative Example 2

[0087] A quick-drying water-based anticorrosive coating is different from Example 1 only in that the curing agent is different. In this comparative example, the curing agent is replaced by N-vinyl imidazole.

[0088] Comparative Example 3

[0089] A quick-drying water-based anticorrosive coating is different from Example 1 only in that the curing agent composition is different. In this comparative example, the curing agent is replaced by a mixture of 5-amino-2-mercaptobenzimidazole and N-vinylimidazole, and the mass ratio of 5-amino-2-mercaptobenzimidazole to N-vinylimidazole is 0.24:0.15.

[0090] Experimental testing

[0091] The water-based anti-corrosion coatings prepared in Example 1 and Comparative Examples 1-3 were sprayed on different SUS201 stainless steel plates, respectively, with a spraying thickness of 80±2 μm. After spraying, they were cured at room temperature (25°C, 65RH%), and the curing time was tested, followed by performance testing and comparison.

[0092] Testing method: The test reference standard for surface drying time and actual drying time is GB / T 1728-2020; the test reference standard for adhesion is GB / T 9286-2021; the test reference standard for impact resistance is GB / T 1732-2020; the test reference standard for salt spray resistance is GB / T1771-2007; the test reference standard for alkali resistance is GB / T 9274-1988, which is to immerse the actual dried paint in 0.1mol / L NaOH solution for 72 hours, and observe whether bubbling, shedding, cracks, powdering, etc. occur after drying; the acid resistance test also refers to GB / T 9274-1988, except that the actual dried paint is immersed in 0.05mol / L H2SO4 solution for 72 hours, and observe whether bubbling, shedding, cracks, powdering, etc. occur after drying.

[0093] The test results are shown in Table 1:

[0094] Table 1 Performance test results of different water-based anti-corrosion coatings

[0095] Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Surface drying time (h) 0.5-0.6 0.7-0.8 0.8-0.9 0.7-0.8 Drying time (h) 11-12 16-17 23-24 19-20 Adhesion(grade) 1 1 1 1 Impact resistance (cm) 50 45 45 45 Hardness (pencil) 4H 3H 3H 3H Salt spray resistance (h) ＞800 500-600 600-700 550-650 Alkali resistance Basically intact A small amount of foaming A small amount of foaming A small amount of foaming Acid resistance Basically intact Basically intact Basically intact Basically intact

[0096] It can be seen from Table 1 that the water-based anti-corrosion coating prepared in Example 1 of the present invention not only has significantly shortened surface drying time and actual drying time compared to Comparative Examples 1-3, but also has better performance in terms of hardness, impact resistance and corrosion resistance.

[0097] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0098] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A quick-drying water-based anti-corrosion coating, characterized in that: Calculated by weight, it includes the following components: 100 parts of waterborne epoxy resin emulsion, 18-32 parts of filler, 1.2-2.4 parts of dispersant, 0.6-1.8 parts of leveling agent, 0.5-1.5 parts of defoamer, 0.2-1 parts of anti-flash rust agent, 25-45 parts of curing agent and 20-30 parts of water.

2. A quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The preparation method of the waterborne epoxy resin emulsion comprises: Weigh the emulsifier and epoxy resin and mix them in a reaction container, heat to 60-80°C, and after fully dispersing them evenly, pour them into a high-speed shearing machine for high-speed shearing and dispersion. During this period, distilled water is continuously added until the solid content of the epoxy resin is 45%-55%, and then continue to shear for 20-30 minutes to obtain a water-based epoxy resin emulsion.

3. A quick-drying water-based anti-corrosion coating according to claim 2, characterized in that: The epoxy resin is a bisphenol A epoxy resin, including at least one of E-51, E-41, and E-20; the emulsifier is a mixture of octylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 1:0.6-1.2, and the added amount of the emulsifier is 5%-15% of the mass of the epoxy resin.

4. A quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The filler is at least one of titanium dioxide, talcum powder, mica powder and zinc phosphate, and has a particle size of 10±2 μm.

5. The quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The leveling agent is at least one of BYK-345, BYK-346, and BYK-349; the dispersant is at least one of BYK-190, BYK-192, and BYK-194; and the defoaming agent is at least one of AFE-7610, AFE-1247, and AFE-1410.

6. The quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The flash rust preventer is at least one of ammonium molybdate, sodium molybdate, ammonium benzoate, sodium benzoate and benzotriazole.

7. The quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The preparation method of the curing agent comprises: S1. Add anhydrous ethanol to the reaction bottle, then add 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole, stir evenly at room temperature, then add a photoinitiator, introduce nitrogen to replace the air, and stir again to obtain a mixed reaction liquid; S2. Place the reaction bottle under an ultraviolet light source, stir the reaction during the irradiation process, stop stirring after the reaction is completed and remove the light source, and perform rotary evaporation on the reaction solution to remove the solvent to obtain a curing agent.

8. The quick-drying water-based anti-corrosion coating according to claim 7, characterized in that: In the S1, the mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinyl imidazole and anhydrous ethanol is (0.16-0.32) g: (0.1-0.2) g: (10-30) mL; the photoinitiator is benzoin dimethyl ether or benzoin diethyl ether, and the added amount is 3.5%-7.5% of the mass of 5-amino-2-mercaptobenzimidazole.

9. The quick-drying water-based anti-corrosion coating according to claim 7, characterized in that: In S2, the power of the ultraviolet light is 80-160W, and the wavelength is 300-400nm; the stirring speed of the reaction is 150-350r / min, and the reaction time is 10-40min.

10. A method for preparing the quick-drying water-based anticorrosive coating according to claim 1, characterized in that: The following steps are involved: Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring them thoroughly to obtain component A; Step 2, mixing the curing agent and water, and stirring them thoroughly to obtain component B; Step 3, gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.