Nanometer sheet-shaped carbon-containing silicon-planting body SiO2 powder anticorrosive paint and preparation method thereof

Abstract

The invention relates to a nanosheet-shaped carbon-containing silicon-planting body S < O2 > powder anticorrosive coating and a preparation method thereof, the coating comprises a component A and a component B, and the component A comprises nanosheet-shaped carbon-containing silicon-planting body S < O2 > powder and epoxy resin. The invention relates to the technical field of anticorrosive paint. According to the preparation method disclosed by the invention, carbon-containing modification of the nano-sheet-shaped carbon-containing silicon-implanted body S < 2 > powder is obtained through treatment, so that the nano-sheet-shaped carbon-containing silicon-implanted body S < 2 > powder and the nano-sheet-shaped carbon-containing silicon-implanted body S < 2 > powder generate a synergistic interaction effect, and furthermore, an effective shielding layer can be formed under a relatively small mixing amount of the nano-sheet-shaped carbon-containing silicon-implanted body S < 2 > powder, and later repairing and polishing are Due to the fact that the nano-sheet-shaped carbon-containing silicon-planting body S < O2 > powder in the coating has a fish scale effect, thousands of nano-sheets are arranged in a staggered mode, a complex and tortuous permeation and diffusion path in the coating is formed, the diffusion path of a corrosive medium becomes tortuous and is difficult to reach a base material, the diffusion path and speed of the corrosive medium in a coating film are greatly prolonged, and the corrosion resistance of the coating film is improved. Therefore, the corrosion of the corrosive medium to the substrate material is effectively delayed.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-corrosion coatings, and in particular to a nano-flaky carbon-containing phytolith SiO 2 Powder anticorrosive coating and preparation method thereof. Background Art

[0002] Corrosion coating refers to coating that can provide long-term protection for the object to be protected in a corrosive environment. 2 Powder anti-corrosion coating is based on corrosion-resistant resin as the main film-forming material, with corrosion-resistant nano-sheet carbon-containing phytolith SiO 2 The powder is used as aggregate, and various additives are added to form a thick paste type coating. 2 Powder anti-corrosion coatings are widely used in the anti-corrosion engineering of metallurgical, chemical, petroleum, marine and other system equipment and buildings. 2 The powder has a fish scale effect. Thousands of nano-flakes are arranged in a staggered manner, forming a complex and tortuous penetration and diffusion pathway in the coating, making the diffusion route of the corrosive medium quite tortuous and difficult to reach the substrate, greatly extending the diffusion path and speed of the corrosive medium in the coating, thereby effectively delaying the corrosion of the corrosive medium to the substrate material.

[0003] Nano-sheet carbon-containing phytolith SiO 2 Powder coatings have received widespread attention and application prospects due to their excellent anti-penetration properties, good corrosion resistance and long service life.

[0004] Although a Chinese patent document (application number 201610312743.1) also discloses a solvent-free epoxy glass flake paint, the document still has the following technical defects: the damaged coating needs to be polished first when the coating is repaired later, but the glass flakes are hard, difficult to polish, and have a large particle size. Introducing more glass flakes will undoubtedly seriously increase the difficulty of later repair and polishing. Summary of the invention

[0005] According to the shortcomings of the prior art, the present invention aims to provide a nano-sheet carbon-containing phytolith SiO 2 Powder anticorrosive coating and preparation method thereof, nano-sheet carbon-containing phytolith SiO is obtained by treatment 2 The powder is modified with carbon, so that the two have a synergistic effect, thereby realizing the nano-sheet carbon-containing phytolith SiO 2 The powder can form an effective shielding layer at a relatively small dosage, and is convenient for later repair and polishing. 2The powder has a fish scale effect. Thousands of nano-flakes are arranged in a staggered manner, forming a complex and tortuous penetration and diffusion pathway in the coating, making the diffusion route of the corrosive medium quite tortuous and difficult to reach the substrate, greatly extending the diffusion path and speed of the corrosive medium in the coating, thereby effectively delaying the corrosion effect of the corrosive medium on the substrate material.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A nano-sheet carbon-containing phytolith SiO 2 Powder anticorrosive coating, the coating comprises component A and component B, the component A comprises nano-flaky carbonaceous phytolith SiO 2 powder, epoxy resin, active diluent, aluminum tripolyphosphate, talcum powder and defoaming agent; the B component is epoxy curing agent H633, and the mass ratio of component A to component B is 1:0.2-0.25.

[0008] Preferably, the sheet-like phytolith SiO 2 The powder is made of newly discovered phytolith SiO 2 The ore is sieved with 200 mesh, calcined at 400-650 degrees without oxygen, and then ball-milled to obtain nano-sheet carbon-containing phytolith SiO 2 Powder, SiO 2 The content is 85-90%, the C content is 5-10%, the flake thickness is less than 100 nanometers, and the width is 300nm-5μm.

[0009] Preferably, the nano-sheet-shaped carbon-containing phytolith SiO 2 The weight portion of the powder is 20 to 35 parts, the weight portion of the epoxy resin is 30 to 40 parts, the weight portion of the active diluent is 5 to 10 parts, the weight portion of the aluminum tripolyphosphate is 12 to 25 parts, the weight portion of the talc is 20 to 30 parts, and the weight portion of the defoaming agent is 0.2 to 0.5 parts.

[0010] A nano-sheet carbon-containing phytolith SiO 2 Powder anticorrosive coating, comprising the following steps:

[0011] S1. Add epoxy resin and active diluent into a stirring kettle at a speed of 100 to 300 rpm and stir evenly to obtain a premix a.

[0012] S2, at a speed of 200 to 400 rpm, aluminum tripolyphosphate, defoamer, nano-sheet carbon-containing phytolith SiO 2 powder and talcum powder, and then disperse them at a speed of 800-1300 rpm for 30-60 min. The temperature during the stirring process is controlled not to exceed 40°C. Stir until they are evenly dispersed to obtain component A.

[0013] S3. Mix component A and component B in a mass ratio of 1:0.23 to obtain the coating.

[0014] In summary, the present invention includes at least one of the following beneficial technical effects:

[0015] 1. Nano-sheet carbon-containing phytolith SiO 2 The powder nano-flakes strengthen the adhesion between scales through the pedicle bond, while effectively ensuring complete spreading;

[0016] 2. Filling the nano-sheet carbon-containing phytolith SiO in a spreading state 2 The pores at the connection between the powder scales effectively increase the carbon-containing phytolith SiO 2 The shielding ability of the powder is conducive to achieving longer-lasting and more effective corrosion protection;

[0017] 3. It is helpful to greatly reduce the nano-sheet carbon-containing phytolith SiO 2 The amount of powder scales used to facilitate later repairs and polishing;

[0018] 4. Nano-sheet carbon-containing phytolith SiO 2 The carbon inside the powder will have affinity with the binder and increase the strength;

[0019] 5. Nano-sheet carbon-containing phytolith SiO 2 Reducing the amount of powder can also effectively reduce the construction thickness and improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a nano-sheet carbon-containing phytolith SiO 2 SEM image of powder. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0022] Embodiment 1:

[0023] Reference Figure 1 The present invention discloses a nano-sheet carbon-containing phytolith SiO 2 Powder anticorrosive coating, the coating comprises component A and component B, the component A comprises nano-flaky carbonaceous phytolith SiO 2 powder, epoxy resin, active diluent, aluminum tripolyphosphate, talcum powder and defoaming agent; the B component is epoxy curing agent H633, and the mass ratio of component A to component B is 1:0.23.

[0024] The flake phytolith SiO 2 The powder is made of newly discovered phytolith SiO 2The ore is sieved to 200 mesh, calcined at 400-650 degrees without oxygen, and then ball-milled to obtain nano-sheet carbon-containing phytolith SiO 2 Powder, SiO 2 The content is 85-90%, the C content is 5-10%, the flake thickness is less than 100 nanometers, and the width is 300nm-5μm.

[0025] The nano-sheet-shaped carbon-containing phytolith SiO in component A 2 The weight parts of powder are 35 parts, the weight parts of epoxy resin are 30 parts, the weight parts of active diluent are 5 parts, the weight parts of aluminum tripolyphosphate are 10 parts, the weight parts of talc powder are 10 parts, and the weight parts of defoaming agent are 0.2 parts.

[0026] Example 2

[0027] Similar to Example 1, the difference is that: the raw materials of component A are prepared according to the following mass parts: nano-sheet carbon-containing phytolith SiO 2 The weight part of powder is 25 parts, the weight part of epoxy resin is 30 parts, the weight part of active diluent is 7 parts, the weight part of aluminum tripolyphosphate is 10 parts, the weight part of talc is 25 parts, and the weight part of defoaming agent is 0.5 parts.

[0028] Example 3

[0029] Similar to Example 1, the difference is that: the raw materials of component A are prepared according to the following mass parts: nano-sheet carbon-containing phytolith SiO 2 The weight part of powder is 15 parts, the weight part of epoxy resin is 35 parts, the weight part of active diluent is 8 parts, the weight part of aluminum tripolyphosphate is 10 parts, the weight part of talc is 30 parts, and the weight part of defoaming agent is 0.4 parts.

[0030] Embodiment 4:

[0031] Similar to Example 1, the difference is that: the raw materials of component A are prepared according to the following mass parts: nano-sheet carbon-containing phytolith SiO 2 The weight part of powder is 5 parts, the weight part of epoxy resin is 30 parts, the weight part of active diluent is 5 parts, the weight part of aluminum tripolyphosphate is 15 parts, the weight part of talc is 30 parts, and the weight part of defoaming agent is 0.5 parts.

[0032] Embodiment 5:

[0033] Similar to Example 1, the difference is that: Component A prepares the raw materials according to the following weight parts: 35 parts by weight of glass flakes, 30 parts by weight of epoxy resin, 10 parts by weight of active diluent, 25 parts by weight of aluminum tripolyphosphate, and 0.5 parts by weight of defoaming agent.

[0034] Combined with Example 1 to Example 5, the product test results are shown in the following table:

[0035] Table 1;

[0036]

[0037] It can be seen from Table 1 that the sheet-like phytolith SiO 2 Powder anti-corrosion coating has better performance than ordinary glass flake anti-corrosion coating, with strong adhesion, impact resistance and better salt resistance.

[0038] Embodiment 6:

[0039] A nano-sheet carbon-containing phytolith SiO 2 Powder anticorrosive coating, comprising the following steps:

[0040] S1. Add epoxy resin and active diluent into a stirring kettle at a speed of 100 to 300 rpm and stir evenly to obtain a premix a.

[0041] S2. At a speed of 200-400 rpm, add aluminum tripolyphosphate, defoamer, nano-flaky carbonaceous phytolith SiO2 powder and talcum powder to premix a in sequence, and then disperse at a speed of 800-1300 rpm for 30-60 min. Control the temperature during the stirring process not to exceed 40°C and stir until uniformly dispersed to obtain component A.

[0042] S3. Mix component A and component B in a mass ratio of 1:0.23 to obtain the coating.

[0043] The invention provides a nano-sheet phytolith SiO 2 Powder anti-corrosion coating, through the treatment to obtain nano-sheet carbon-containing phytolith SiO 2 The powder is modified with carbon, so that the two have a synergistic effect, thereby realizing the nano-sheet carbon-containing phytolith SiO 2 The powder can form an effective shielding layer at a relatively small dosage, and is convenient for later repair and polishing. 2 The powder has a fish scale effect. Thousands of nano-flakes are arranged in a staggered manner, forming a complex and tortuous penetration and diffusion pathway in the coating, making the diffusion route of the corrosive medium quite tortuous and difficult to reach the substrate, greatly extending the diffusion path and speed of the corrosive medium in the coating, thereby effectively delaying the corrosion of the corrosive medium to the substrate material.

[0044] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A nano-flaky carbon-containing phytolith SiO2 powder anticorrosive coating, characterized in that: The coating comprises component A and component B, wherein component A comprises nano-flaky carbonaceous phytolith SiO2 powder, epoxy resin, active diluent, aluminum tripolyphosphate, talcum powder and defoamer; component B is epoxy curing agent H633, and the mass ratio of component A to component B is 1:0.2-0.

25.

2. A nano-flaky carbon-containing phytolith SiO2 powder anticorrosive coating according to claim 1, characterized in that: Nano-flaky phytolith SiO2 powder is made from the newly discovered phytolith SiO2 ore in Fengcheng, Jiangxi Province. It is sieved with 200 mesh, calcined at 400-650 degrees without oxygen, and then ball-milled to obtain nano-flaky carbon-containing phytolith SiO2 powder. The SiO2 content is 85-90%, the C content is 5-10%, the flake thickness is less than 100 nanometers, and the width is 300nm-5μm.

3. The nano-flaky carbon-containing phytolith SiO2 powder anticorrosive coating according to claim 1, characterized in that: The weight portion of the nano-flaky carbon-containing phytolith SiO2 powder in component A is 20 to 35 parts, the weight portion of the epoxy resin is 30 to 40 parts, the weight portion of the active diluent is 5 to 10 parts, the weight portion of aluminum tripolyphosphate is 12 to 25 parts, the weight portion of talc is 20 to 30 parts, and the weight portion of the defoaming agent is 0.2 to 0.5 parts.

4. A nano-flaky carbon-containing phytolith SiO2 powder anti-corrosion coating, according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Add epoxy resin and active diluent into a stirring kettle at a speed of 100 to 300 rpm and stir evenly to obtain a premix a. S2. At a speed of 200-400 rpm, add aluminum tripolyphosphate, defoamer, nano-flaky carbonaceous phytolith SiO2 powder and talcum powder to premix a in sequence, and then disperse at a speed of 800-1300 rpm for 30-60 min. Control the temperature during the stirring process not to exceed 40°C and stir until uniformly dispersed to obtain component A. S3. Mix component A and component B in a mass ratio of 1:0.23 to obtain the coating.

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