Antirust coating with high acid resistance and preparation method thereof

Abstract

The invention discloses an antirust coating with high acid resistance, which comprises the following components by weight: 70-80 parts of styrene-acrylic emulsion, 24-30 parts of pure acrylic emulsion, 6-8 parts of ethanol, 1-3 parts of ethylene glycol monobutyl ether, 2-3 parts of triethanolamine, 1-3 parts of hydroquinone, 1-3 parts of 2,6-butylated hydroxytoluene, 3-4 parts of sodium ethylenediamine tetramethylene phosphonate, 2-3 parts of tartaric acid, 1-2 parts of citric acid, 1-2 parts of modified adhesive, 0.6-0.9 part of 1-hydroxybenzotriazole, 0.3-0.5 part of sodium polyacrylate, and a proper amount of deionized water. The coating is excellent in comprehensive performance of adhesion to a substrate, corrosion resistance and adhesion, completely replaces the sand blasting and shot-blasting coating pretreatment process, protects the surface of steel which is rusted and not pre-treated efficiently for a long time, and not only prolongs the service life of anti-corrosion finish, but also is simpler, more efficient, more economic, and more environmental-friendly in the anti-corrosion coating process.

Description

technical field [0001] The invention mainly relates to a water-based paint, in particular to a water-based anti-rust paint with high acid resistance and a preparation method thereof. Background technique [0002] In order to protect steel from corrosion and prolong its service life, anti-corrosion coating on steel has become the most economical and effective method. In order to obtain excellent corrosion resistance, the rust on the steel must be removed before painting, otherwise the paint film and anti-corrosion effect will be poor due to the continuous expansion of the rust. Therefore, the rust removal treatment is an important part of the coating process Part, plays a decisive role in the success or failure of anti-corrosion coating. However, due to the limitation of construction conditions in the maintenance process of many large buildings, bridges, ships, and other complex steel structure components, it is difficult to use mechanized construction methods, and only ...

AI Technical Summary

Problems solved by technology

At present, the anticorrosion of domestic steel structures still uses the old process of painting after sandblasting. Although the anticorrosion effect is good, there are also complex structural parts with dead angles in sandblasting and shot blasting processes, high power consumption, dust pollution, noise pollution, and cost. Therefore, it is very necessary to prepare rusty coatings that can be directly applied on rusty surfaces.

[0003] The traditional process uses phosphoric acid as a conversion agent. Although phosphoric acid can convert rust into a phosphating film, due to hydrogen precipitation, the paint film is prone to foaming, resulting in a decrease in adhesion