Rust finish paint is often referred to as rust paint. Rust finish paint refers to a primer that can be painted on steel surfaces that have not been fully derusted and has an antirust function. Well-pretreated substrate ten coating can give full play to its effect. However, in many cases it is very difficult or impossible to carry out surface rust removal according to the regulations. Rust coatings are designed to adapt to this situation, but rust coatings are not willing to be used on any severely corroded surfaces. Paint upwards, the floating rust must be eradicated, and the rusty paint can only be painted after brushing with a wire brush.
There are more than 100 kinds of rust surface coatings. According to the antirust mechanism, the surface coatings are often divided into three types: stable type, penetrating scraping, and transformation. The stable type of rust surface coating is composed of film-forming substances, active pigments and additives. The film is mainly made of alkyd and oil-based resin, and the active pigments include zinc phosphate, salt and quack, etc. After the film is formed, the active pigment and rust slowly form insoluble matter, which stabilizes the rust and prevents it from entering- The stable rust surface coating is suitable for 1 occasions where the rust layer is not too thick and the requirements are not high. The scale, flake thick rust and oil stains should be removed before painting. The penetrating rust surface coating is composed of film-forming substances and antirust pigments. penetrating agent etc. The film-forming material is oleoresin or grease, such as clear oil oil-based resin, alkyd, epoxy resin, etc. The antirust pigments are red lead and iron red, or ferrites of alkali metals and alkaline earth metals. The film-forming material of the penetrating rust surface paint has strong penetrability, can penetrate into the loose rust, separate the rust, remove the moisture and air in the rust layer, and prevent the further development of the rust, and the penetrating rust surface paint is suitable For steel surfaces with relatively old rust and less chemical pollution; the transformation type rust surface coating t is to use the Korean agent in the paint to react with the rust to convert the rust into a harmless or protective substance, such as phosphoric acid. The effect of the conversion type rust surface coating on the steel surface with uniform rust layer and no flake rust is better.
