Water-based heavy-duty anti-corrosion one-component rust primer and its preparation method and application

Abstract

A water-based heavy-anticorrosion single-component primer for a rusty surface consists of the following compositions: deionized water, a main conversion agent, an auxiliary conversion agent, a penetrant, a coalescing agent, an anti-freezing agent, an anti-corrosion agent, a thickening agent, a filler, an antifoam agent, a dispersant, a pH modifier, a film former, and a substrate wetting agent. The main conversion agent is an EDTA, phytic acid or tannic acid metal ion complexing agent. The auxiliary conversion agent is one or more of oxalic acid, tartaric acid, and citric acid. To apply the primer, it is only required to simply remove loose rusts and old coatings on pipes, and it is not necessary to polish tightly adhered rusts completely.

Description

technical field [0001] The invention belongs to the field of chemical coatings, and in particular relates to a water-based heavy-duty anti-corrosion single-component rust-carrying primer and a preparation method and application thereof. Background technique [0002] The current use of water-based anti-corrosion coatings in the field of heavy-duty anti-corrosion is still very low. The reasons are complex and multifaceted: 1. Some users are more conservative and unwilling to try coating products based on new technologies. 2. The price of solvent-based coatings is relatively cheap, but the amount of VOC emissions is large, causing serious environmental pollution. However, there are few environmental protection regulations that restrict its use, which cannot effectively restrict its use. 3. The price of water-based coatings is high, and the performance in some aspects is not ideal, and there are certain limitations in use. However, the benefits of using water as a solvent and t...

AI Technical Summary

Problems solved by technology

[0002] The amount of water-based anti-corrosion coatings used in the field of heavy-duty anti-corrosion is still very low. The reasons are complex and multifaceted: 1. Some users are conservative and unwilling to try coating products based on new technologies

2. The price of solvent-based coatings is relatively cheap, but the amount of VOC emissions is large, and the environmental pollution is serious. However, there are few environmental protection regulations restricting it, and its use cannot be effectively restricted.

3. The price of water-based coatings is high, and the performance in some aspects is not ideal, and there are certain limitations in use

They have some defects such as high pre-treatment requirements, easy to cause flash rust, troublesome two-component construction, slow drying speed, high price, high VOC content, etc.