Environment-friendly water-based anticorrosive paint and preparation method thereof

Abstract

The invention discloses environment-friendly water-based anticorrosive paint. The paint comprises the following raw materials in part by weight: 70-76 parts of styrene-acrylic emulsion, 26-35 parts of water-based acrylic emulsion, 2-3 parts of ethylene glycol monobutyl ether, 2-3 parts of sodium carboxymethyl cellulose, 3-4 parts of alcohol, 3-4 parts of sorbitol, 2-3 parts of hydroquinone, 1-2 part (s) of pyrogallic acid, 3-4 parts of EXTylene Diamine Tetra (MeXTylene Phosphonic Acid) Sodium, 2-3 parts of oxalic acid, 1-2 part (s) of malic acid, 1-2 part (s) of modified adhesive, 0.5-0.7 part of Methylbenzotriazole, 0.1-0.3 part of methyl hydroxy propyl cellulose and a proper amount of deionized water. The environment-friendly water-based anticorrosive paint has excellent comprehensive performances, such as adhesive force and corrosive resistance, to a base body, can completely replace coating pretreatment processes, such as sand blasting and shot blasting, and provides long-term efficient protection to rusty iron steel surfaces which are not subject to pretreatment, thereby not only remarkably prolonging the service life of anticorrosion finish paint but also achieving a simpler and more efficient, economical and environment-friendly anticorrosion coating process.

Description

technical field [0001] The invention mainly relates to a water-based paint, in particular to an environment-friendly water-based anti-rust paint 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 manu...

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