CN-122011894-A - Water-based non-carbon static conductive anticorrosive paint and preparation method thereof

Abstract

The invention provides a water-based non-carbon static conductive anticorrosive paint and a preparation method thereof. The method is simple and convenient, the prepared anticorrosive paint has excellent salt spray resistance and chemical medium resistance, the 5%H 2 SO 4 resistance can reach more than 60 days, the adopted bisphenol A/F copolymerization type aqueous epoxy resin improves the polarity and the water degree of a system, the optimal anticorrosive performance of the paint is ensured, the aqueous polyaniline is matched with the conductive mica powder to serve as a non-carbon conductive filler of the system, the environment-friendly requirement is met, the conductivity and the anticorrosive performance of the paint are ensured, the adhesive force of a paint film is improved by adopting a silane coupling agent containing reactive glycidoxy and methoxy groups, the service life is prolonged, and the aqueous non-carbon conductive anticorrosive paint can be used for anticorrosive engineering of steel structures such as petroleum storage tanks, equipment pipelines, ocean platforms and the like.

Inventors

• LI HONGYUAN
• KANG SHAOWEI
• HAN ZHONGZHI
• BAI FENGXIANG
• WANG LEI
• GUO XIAOJUN
• WANG PENGZHEN
• LIU DEYANG
• CUI CANCAN
• DING CHAO

Assignees

• 中国石油天然气集团有限公司
• 中国石油集团海洋工程有限公司
• 中国石油集团工程技术研究有限公司

Dates

Publication Date

20260512

Application Date

20241108

Claims (10)

1. 1. The water-based non-carbon static conductive anticorrosive paint is characterized by comprising the following components in parts by weight: The component A comprises 50-55 parts by weight of aqueous epoxy resin, 8-10 parts by weight of deionized water; 1-1.5 parts of dispersing agent, 0.4-0.6 part of defoamer, 3-5 parts of titanium pigment, 4-6 parts of aluminum tripolyphosphate, 10-15 parts of polyaniline, 15-20 parts of conductive mica powder, 2-3 parts of film forming additive, 0.25-0.4 part of wetting agent, 0.3-0.5 part of thickener and 0.6-1.0 part of silane coupling agent; The component B comprises 62-65 parts by weight of epoxy curing agent, 30-35 parts by weight of deionized water; 0.1 to 0.2 weight portion of flash rust inhibitor; Wherein the weight ratio of the component A to the component B is 7:1.
2. 2. The aqueous non-carbon static conductive anticorrosive paint according to claim 1, wherein the component A comprises 52 parts by weight of aqueous epoxy resin, 8 parts by weight of deionized water, 1 part by weight of dispersing agent, 0.4 part by weight of defoamer, 4 parts by weight of titanium pigment, 4 parts by weight of aluminum tripolyphosphate, 4 parts by weight of polyaniline, 12 parts by weight of conductive mica powder, 15 parts by weight of film forming additive, 2 parts by weight of wetting agent, 0.4 part by weight of thickener, 0.5 part by weight of silane coupling agent, 0.8 part by weight of epoxy curing agent, 62 parts by weight of deionized water, 30 parts by weight of flash rust inhibitor and 0.2 part by weight of flash rust inhibitor.
3. 3. The aqueous non-carbon static conductive anticorrosive paint according to claim 1, wherein the aqueous epoxy resin is bisphenol a/F copolymerized aqueous epoxy resin, and the dispersant is a block copolymer solution containing pigment affinity groups.
4. 4. The aqueous non-carbon static conductive anticorrosive paint according to claim 1, wherein the defoamer is a polysiloxane solution containing hydrophobic particles, and the titanium white powder is 800 mesh anatase titanium white powder.
5. 5. The aqueous non-carbon based static conductive anticorrosive paint according to claim 1, wherein the aluminum tripolyphosphate is an aminosilane modified aluminum tripolyphosphate, and the polyaniline is an aqueous polyaniline solution.
6. 6. The aqueous non-carbon based static conductive anticorrosive paint according to claim 1, wherein the powder resistivity of the conductive mica powder is less than 150Ω -cm.
7. 7. The aqueous non-carbon static conductive anticorrosive paint according to claim 1, wherein the film forming additive is one or more of dipropylene glycol methyl ether and dipropylene glycol butyl ether, and the thickener is one or more of nonionic low-shear polyurethane thickener and nonionic medium-shear polyurethane thickener.
8. 8. The aqueous non-carbon based static conductive anticorrosive paint according to claim 1, wherein the wetting agent is a gemini type organically modified polysiloxane compound, and the silane coupling agent contains reactive glycidoxy and methoxy groups.
9. 9. The preparation method of the water-based non-carbon static conductive anticorrosive paint according to claim 1, wherein the epoxy curing agent is a self-emulsifying nonionic modified amine epoxy curing agent, and the anti-flash rust agent is an organic zinc chelate.
10. 10. A method of preparing an aqueous non-carbon based static conductive anticorrosive coating according to any one of claims 1 to 9, comprising: Preparing water-based non-carbon static conductive slurry, preparing deionized water in advance, sequentially adding a dispersing agent and a defoaming agent for dispersing, then adding titanium dioxide, aluminum tripolyphosphate, polyaniline and conductive mica powder for continuous dispersion, and finally grinding to obtain water-based non-carbon static conductive slurry; The method comprises the steps of (1) preparing a component A, adding a preset amount of aqueous epoxy resin into the aqueous slurry, sequentially adding a film forming auxiliary agent, a wetting agent and a silane coupling agent for dispersion, and finally adding a thickening agent for continuous dispersion to obtain the component A of the aqueous non-carbon static conductive anticorrosive paint; Preparing the component B, preparing a preset amount of modified amine epoxy curing agent, and then respectively adding deionized water and a flash rust inhibitor for dispersion to obtain the component B of the water-based non-carbon static conductive anticorrosive paint; and (3) preparing the water-based non-carbon static conductive anticorrosive paint, and uniformly mixing the prepared component A and component B according to the weight part ratio of the preset proportion to obtain the water-based non-carbon static conductive anticorrosive paint.

Description

Water-based non-carbon static conductive anticorrosive paint and preparation method thereof Technical Field The invention relates to the technical field of anticorrosive coatings, in particular to an aqueous non-carbon static conductive anticorrosive coating and a preparation method thereof. Background The petroleum storage tank is used as important equipment of oil-gas field and refining enterprises, and plays a key role in guaranteeing production stability and improving energy utilization rate. However, the petroleum storage tank is easily influenced by factors such as static hazard and complex corrosive medium, so that corrosion or static fire occurs on the inner wall of the storage tank, fire or explosion accidents are caused, the production safety of petroleum and petrochemical enterprises is influenced, and huge economic and environment-friendly pressure is caused. The static conductive paint can ensure the safe construction of the petroleum storage tank through corrosion protection and static charge accumulation removal, thereby avoiding disaster accidents. The conventional static conductive paint mainly takes solvent-type and solvent-free type, the solvent-type static conductive paint has potential safety hazards of environmental pollution, harm to the health of workers and high concentration of organic volatile matters in sealing construction, and the solvent-free static conductive paint has the defects of difficult roller coating and brushing construction due to high solid content and high viscosity, so that the coating efficiency is reduced. The application requirements of the electrostatic conductive paint with safety, environmental protection and high construction efficiency are increasing. The water-based paint is developed with high quality under the promotion of national security and environmental protection policies, GB/T50393-2017 technical Standard for anticorrosion engineering of Steel Petroleum storage tanks particularly mentions and prescribes the performance requirement of the water-based heavy anticorrosion paint, the water-based static conductive paint can replace the traditional solvent static conductive paint, meets the requirements of safety and environmental protection, and solves the technical problems of high viscosity and difficult roll coating and brush coating construction of the solvent-free static conductive paint, but the corrosion problem caused by potential difference exists in the traditional water-based carbon static conductive paint, and the performance index of hot water resistance and chemical medium resistance prescribed by GB/T50393-2017 is difficult to reach. Therefore, the water-based non-carbon static conductive anticorrosive paint with excellent corrosion resistance, stable static conductive performance and good construction adaptability is developed, and has extremely high market popularization value for guaranteeing safe construction of a closed space, improving coating efficiency and guaranteeing stable operation of a petroleum storage tank. Disclosure of Invention In view of the above, the invention provides an aqueous non-carbon static conductive anticorrosive paint, which comprises the following components in parts by weight: The component A comprises 50-55 parts by weight of aqueous epoxy resin, 8-10 parts by weight of deionized water; 1-1.5 parts of dispersing agent, 0.4-0.6 part of defoamer, 3-5 parts of titanium pigment, 4-6 parts of aluminum tripolyphosphate, 10-15 parts of polyaniline, 15-20 parts of conductive mica powder, 2-3 parts of film forming additive, 0.25-0.4 part of wetting agent, 0.3-0.5 part of thickener and 0.6-1.0 part of silane coupling agent; The component B comprises 62-65 parts by weight of epoxy curing agent, 30-35 parts by weight of deionized water and 0.1-0.2 part by weight of flash rust inhibitor; Wherein the weight ratio of the component A to the component B is 7:1. The component A comprises 52 parts by weight of aqueous epoxy resin, 8 parts by weight of deionized water, 1 part by weight of dispersing agent, 0.4 part by weight of defoaming agent, 4 parts by weight of titanium dioxide, 4 parts by weight of aluminum tripolyphosphate, 4 parts by weight of polyaniline, 12 parts by weight of conductive mica powder, 15 parts by weight of film forming additive, 2 parts by weight of wetting agent, 0.4 part by weight of thickener, 0.5 part by weight of silane coupling agent, 0.8 part by weight of epoxy curing agent, 62 parts by weight of deionized water, 30 parts by weight of anti-flash rust agent and 0.2 part by weight of anti-flash rust agent. Further, the aqueous epoxy resin is bisphenol A/F copolymerized aqueous epoxy resin. Further, the dispersant is a block copolymer solution containing pigment affinic groups. Further, the defoamer is a polysiloxane solution containing hydrophobic particles. Further, the titanium dioxide is 800-mesh anatase titanium dioxide. Further, the aluminum tripolyphosphate is an aminosilane modified alu