Mineral powder doped water-based anticorrosive paint and preparation method thereof

Abstract

The invention discloses mineral powder doped water-based anticorrosive paint and a preparation method thereof, and belongs to the technical field of anticorrosive paint. The mineral powder doped water-based anticorrosive paint comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 40 to 55 parts of waterborne epoxy resin emulsion, 4 to 16 parts of nano TC4 powder, 0.4 to 2.2 parts of nano TiO2, 1.8 to 6.6 parts of flatting agent, 0.6 to 2.9 parts of nano carbon powder, 15 to 30 parts of steel slag mineral powder, 1.4 to 6.8 parts of polytetrafluoroethylene powder, 1.2 to 8.8 parts of organic titanium and 8 to 20 parts of water; and the component B is 6-24 parts by weight of a curing agent. The coating capable of resisting the severe underground environment is prepared by reasonably selecting the coating materials, proportioning the components and reasonably controlling the technological process, and has the characteristics of high salt corrosion resistance, high humidity corrosion resistance, good acid and alkali resistance, low cost, good film-forming property and convenience in operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a mineral powder-doped water-based anti-corrosion coating and a preparation method thereof. Background Art

[0002] Paint application is the most common on-site corrosion protection and maintenance method for steel structures. Most coatings are typically thermosetting, which cure when a functional resin reacts with a cross-linking material containing functional groups that react with the resin's functional groups. Different coatings require specific modifications depending on the environment in which they are used. Steel structures and metal components used in underground operations are often exposed to humid, acidic, and alkaline environments year-round. Therefore, those skilled in the art have been researching coatings that can withstand the harsh underground environment.

[0003] To further enhance the coating's corrosion resistance, materials such as nano-TC4 powder are added. Nano-TC4 powder exhibits a nano-effect, resulting in a relatively uniform distribution within the coating. Under environmental influences, it readily forms a TiO2 protective film, enhancing the coating's corrosion resistance. The organic titanium polymer, primarily tetraisopropyl titanate, synergizes with the nano-TC4 powder and nano-TiO2 to form a high-performance TiO2 protective film, enhancing corrosion resistance. Furthermore, the organic titanium polymer reacts with metal powders such as zinc and aluminum in the mineral powder, and the addition of a resin solution intensifies the protective effect. Steel slag mineral powder primarily contains metal powders such as zinc and aluminum, as well as their oxides. When reacted with the resin solution, it forms various metal oxide films, enhancing the coating's protective properties. Nano-carbon powder and polytetrafluoroethylene powder work synergistically to improve the coating's fluidity and transparency, imparting its exceptional color. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a mineral powder-doped water-based anti-corrosion coating and a preparation method thereof, so as to meet the needs of the coating for anti-corrosion operations in underground coal mines.

[0005] The present invention is achieved through the following technical solutions: A mineral powder-doped water-based anti-corrosion coating, comprising a component A and a component B; The component A comprises the following raw materials in parts by weight: 40-55 parts of waterborne epoxy resin emulsion, 4-16 parts of nano TC4 powder, 0.4-2.2 parts of nano TiO2, 1.8-6.6 parts of leveling agent, 0.6-2.9 parts of nano carbon powder, 15-30 parts of steel slag powder, 1.4-6.8 parts of polytetrafluoroethylene powder, 1.2-8.8 parts of organic titanium, and 8-20 parts of water; The B component is 6 to 24 parts by weight of a curing agent.

[0006] Furthermore, the steel slag powder has a size of 400-600 mesh, and the polytetrafluoroethylene powder has a size of 1000-1200 mesh.

[0007] Furthermore, the organic titanium is tetraisopropyl titanate.

[0008] Furthermore, the leveling agent is a polyurethane associative compound.

[0009] Furthermore, the curing agent is an amine curing agent.

[0010] Furthermore, the amine curing agent is polyamide.

[0011] In the present invention, the method for preparing the mineral powder-doped water-based anti-corrosion coating comprises the following steps: (1) Mix water-based epoxy resin emulsion, nano TC4 powder, nano TiO2, nano carbon powder, steel slag powder, polytetrafluoroethylene powder, organic titanium and water, add leveling agent during the mixing process, and stir thoroughly to obtain component A; (2) Mixing component A and component B to obtain mineral powder-doped water-based anti-corrosion coating; Furthermore, in step (1), the stirring speed is 300-500 r / min, the stirring time is 3-5 h, and the mixture is placed for 24 h for standby use; in step (2), the stirring speed is 300-500 r / min, and the stirring time is 90-120 min.

[0012] Beneficial effects The present invention prepares a coating that can withstand the harsh environment of the underground mine through reasonable selection of coating materials and ratio of components, and reasonable control of the process. The coating has the characteristics of high salt corrosion resistance, high humidity corrosion resistance, good acid and alkali resistance, low cost, good film-forming property, and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an SEM image of the coating surface after curing of the water-based anti-corrosion coating of Example 1; Figure 2 This is an SEM image of the coating surface after curing of the water-based anti-corrosion coating of Example 2; Figure 3 This is an SEM image of the coating cross section after the water-based anti-corrosion coating of Example 3 is cured. DETAILED DESCRIPTION

[0014] The present invention is described below with reference to examples, which are only used to explain the present invention and are not used to limit the scope of the present invention.

[0015] Unless otherwise specified, the raw materials in the following examples and comparative examples are all commercially available.

[0016] Example 1 A water-based anti-corrosion coating, comprising component A and component B, wherein component A comprises the following substances in parts by weight: 40 parts of water-based epoxy resin emulsion, 6 parts of nano-TC4 powder, 0.8 parts of nano-TiO2, 2.0 parts of a leveling agent polyurethane associative compound, 1.0 part of nano-carbon powder, 15 parts of steel slag powder (400-600 mesh), 2.3 parts of polytetrafluoroethylene powder (1000-1200 mesh), 1.8 parts of organic titanium tetraisopropyl titanate, and 10 parts of water; and component B comprises 6 parts by weight of a curing agent polyamide. Preparation process and method: (1) Preparation of coating: Weigh the materials of component A in order of weight, stir the waterborne epoxy resin emulsion, nano TC4 and other powders with a mixer at a stirring speed of 300 r / min for 3 hours. Finally, add the leveling agent gradually during the stirring process, stir thoroughly to prepare component A, observe whether the components of the coating are evenly dispersed, and leave it for 24 hours for use; (2) Add component B to component A gradually and perform magnetic stirring at a stirring speed of 300 r / min for 90 min to prepare an anti-corrosion coating for standby use; (3) Prepare the test substrate, polish it with 200#-600# sandpaper, then clean the surface of the substrate with acetone solution and ethanol solution to remove the dirt on the surface of the substrate, put it into a vacuum drying oven for drying at 80℃ for 15 minutes, and then set aside; (4) Apply or spray Use a special paint brush or sprayer to evenly apply the paint on the surface of the substrate. The surface of the substrate should be even, flat and without dead corners. Place it at a temperature of 25±2℃ for 48 hours. (5) The surface morphology of the substrate coating was observed using SEM. The coating surface had no cracks, good film formation, relatively uniform distribution of solid powder, and no agglomeration. The experimental results are as follows: Figure 1 shown.

[0017] Example 2 A water-based anti-corrosion coating, comprising component A and component B, wherein component A comprises the following substances in parts by weight: 50 parts of water-based epoxy resin emulsion, 10 parts of nano-TC4 powder, 1.2 parts of nano-TiO2, 2.8 parts of polyurethane associative compound as a leveling agent, 1.8 parts of nano-carbon powder, 20 parts of steel slag powder (400-600 mesh), 2.9 parts of polytetrafluoroethylene powder (1000-1200 mesh), 5.6 parts of organic titanium tetraisopropyl titanate, and 18 parts of water; and component B comprises 12 parts by weight of polyamide as a curing agent. Preparation process and method: (1) Preparation of coating: Weigh the materials of component A in order of weight, stir the waterborne epoxy resin emulsion, basalt flakes and other powders in a mixer at a stirring speed of 400 r / min for 4 h. Finally, add the leveling agent gradually during the stirring process, stir thoroughly to prepare component A, observe whether the components of the coating are evenly dispersed, and leave it for 24 h for use; (2) Add component B to component A gradually and perform magnetic stirring at a stirring speed of 400 r / min for 100 min to prepare an anti-corrosion coating for standby use; (3) Prepare the test substrate, polish it with 200#-600# sandpaper, then clean the surface of the substrate with acetone solution and ethanol solution to remove the dirt on the surface of the substrate, put it into a vacuum drying oven for drying at 80℃ for 20min, and then set aside; (4) Apply or spray Use a special paint brush or sprayer to evenly apply the paint on the surface of the substrate. The surface of the substrate should be even, flat and without dead corners. Place it at a temperature of 25±2℃ for 48 hours. (5) The surface morphology of the substrate coating was observed using SEM. The coating surface had no cracks, good film formation, relatively uniform distribution of solid powder, and no agglomeration. The experimental results are as follows: Figure 2 shown.

[0018] Example 3 A water-based anti-corrosion coating, comprising component A and component B, wherein component A comprises the following substances in parts by weight: 5 parts of water-based epoxy resin emulsion, 12 parts of nano-TC4 powder, 2.0 parts of nano-TiO2, 5.6 parts of polyurethane associative compound as a leveling agent, 2.8 parts of nano-carbon powder, 30 parts of steel slag powder (400-600 mesh), 5.8 parts of polytetrafluoroethylene powder (1000-1200 mesh), 6.8 parts of organic titanium tetraisopropyl titanate, and 20 parts of water; and component B comprises 24 parts by weight of polyamide as a curing agent. Preparation process and method: (1) Preparation of coating: Weigh the materials of component A in order of weight, stir the waterborne epoxy resin emulsion, basalt flakes and other powders in a mixer at a stirring speed of 500 r / min for 5 h. Finally, add the leveling agent gradually during the stirring process, stir thoroughly to prepare component A, observe whether the components of the coating are evenly dispersed, and leave it for 24 h for use; (2) Add component B to component A gradually and perform magnetic stirring at a stirring speed of 500 r / min for 120 min to prepare an anti-corrosion coating for standby use; (3) Prepare the test substrate, polish it with 200#-600# sandpaper, then clean the surface of the substrate with acetone solution and ethanol solution to remove the dirt on the surface of the substrate, put it into a vacuum drying oven for drying at 80℃ for 30min, and then set aside; (4) Apply or spray Use a special paint brush or sprayer to evenly apply the paint on the surface of the substrate. The surface of the substrate should be even, flat and without dead corners. Place it at a temperature of 25±2℃ for 48 hours. (5) The cross-sectional morphology of the substrate coating was observed using SEM. The coating cross-sectional morphology showed no cracks, good film formation, relatively uniform distribution of solid powder, and no agglomeration. The experimental results are as follows: Figure 3 shown.

[0019] Comparative Example 1 A waterborne epoxy zinc-rich paint consists of a component A and a component B, wherein the component A comprises the following substances in parts by weight: 50 parts of waterborne epoxy emulsion, 20 parts of zinc powder, and 1 part of a leveling agent polyurethane associative compound; and the component B is 20 parts by weight of a curing agent polyamide.

[0020] The coating's pull-off strength, salt spray test and other properties were tested in accordance with GB / T5210-2006, GB / T10125-2021 and other standards. The test results are shown in Table 1: Table 1. Performance of coatings in Examples 1-3 .

Claims

1. A mineral powder-doped water-based anti-corrosion coating, characterized in that: It includes component A and component B; The component A comprises the following raw materials in parts by weight: 40-55 parts of waterborne epoxy resin emulsion, 4-16 parts of nano TC4 powder, 0.4-2.2 parts of nano TiO2, 1.8-6.6 parts of leveling agent, 0.6-2.9 parts of nano carbon powder, 15-30 parts of steel slag powder, 1.4-6.8 parts of polytetrafluoroethylene powder, 1.2-8.8 parts of organic titanium, and 8-20 parts of water; The B component is 6 to 24 parts by weight of a curing agent.

2. The mineral powder-doped water-based anti-corrosion coating according to claim 1, characterized in that: The steel slag powder has a size of 400-600 mesh, and the polytetrafluoroethylene powder has a size of 1000-1200 mesh.

3. The mineral powder-doped water-based anti-corrosion coating according to claim 1, characterized in that: The organic titanium is tetraisopropyl titanate.

4. The mineral powder-doped water-based anti-corrosion coating according to claim 3, characterized in that: The leveling agent is a polyurethane associative compound.

5. The mineral powder-doped water-based anti-corrosion coating according to claim 1, characterized in that: The curing agent is an amine curing agent.

6. The mineral powder-doped water-based anti-corrosion coating according to claim 5, characterized in that: The amine curing agent is polyamide.

7. A method for preparing a mineral powder-doped water-based anti-corrosion coating according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) Mix water-based epoxy resin emulsion, nano TC4 powder, nano TiO2, nano carbon powder, steel slag powder, polytetrafluoroethylene powder, organic titanium and water, add leveling agent during the mixing process, and stir thoroughly to obtain component A; (2) Component A and component B are mixed to obtain mineral powder-doped water-based anti-corrosion coating.

8. The method for preparing the mineral powder-doped water-based anti-corrosion coating according to claim 7, characterized in that: In step (1), the stirring speed is 300-500 r / min, the stirring time is 3-5 h, and the mixture is placed for 24 h for standby use; in step (2), the stirring speed is 300-500 r / min, and the stirring time is 90-120 min.

Images