Water-borne rust-based anticorrosion coating and preparation method thereof

Abstract

The invention discloses a water-borne rust-based anticorrosion coating which comprises the following raw materials by weight portion: 60-70 portions of styrene-acrylic emulsion, 30-40 portions of water-borne acrylic emulsion, 2-4 portions of alcohol ester-12 forming additive, 2-3 portions of vanadium oxytrichloride, 0.5-0.8 portions of benzotriazole, 3-4 portions of glycerine, 2-4 portions of 2- methyl-1,3- propylene glycol, 2-3 portions of hydroquinone, 1-2 portions of pyrocatechol, 2-3 portions of Ethylene Diamine Tetra Methylene Phosphonic Acid Sodium, 3-4 porptions of citric acid, 1-2 portions of modified adhesive, 0.1-0.2 portions of carboxymethyl cellulose and an appropriate amount of deionized water. The coating has good comprehensive performances including base body adhesive power, rot resistance, adhesive power, can completely avoid coating preprocessing processes, including sand blasting and shot-blasting, and can provide lasting and efficient protection for iron steels, the surfaces of which are rusty and not subjected to pre-processing; and accordingly, not only is the service life of an anti-corrosion finishing coat prolonged, but also the anti-corrosion coating process is simpler, and more efficient, economical and environment-friendly.

Description

technical field [0001] The invention mainly relates to a water-based paint, in particular to a water-based anti-rust paint with rust 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 manual or electr...

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