Mechanism and variety of metal antirust paint

Most afraid of rust. Anti-rust work has always been the subject of the metal industry class forever. Paint rust is an effective method. For rust prevention, since steel accounts for 95% of the metal used, and 70% of the steel is used in the rust-prone atmosphere, isolation of air is the main task of the antirust paint.

First, anti-rust paint rust mechanism Overview Anti-rust paint is the main component of anti-rust paint and film-forming substances. The mechanism of anti-rust mechanism can be roughly classified into four types: physical anti-rust paint, chemical anti-rust paint, electrochemical anti-rust paint and comprehensive anti-rust paint.

1. Anti-rust effect of physical anti-rust paint This kind of anti-rust paint and the metal surface to be coated are basically no chemical or electrochemical reaction. Its anti-rust effect is that they are insoluble in water and should not be decomposed and destroyed by corrosive media. Chemically stable inert pigments and fillers, the coating itself is safe; some anti-rust paint with fine scaly material as the main pigment, the scales in the paint film and the substrate is arranged in parallel, overlap and overlap each other, It can block the contact between the corrosive medium and the substrate, or extend the penetration path of the corrosive medium into the substrate to achieve corrosion inhibition, such as iron-red flakes, micaceous iron oxide, and glass flakes.

2. Anti-rust effect of chemical anti-rust paint Chemical anti-rust paint is the main anti-rust paint. They use a variety of chemically active pigments and rely on chemical reactions to change the nature of the surface and the nature of the reaction products to achieve rust protection.

Chemical anti-rust pigments interact with metal surfaces, such as passivation, phosphating, saponification, corrosion inhibition, and complex formation.

The main varieties of chemical anti-rust pigments include: red lead, zinc chrome yellow, zinc phosphate, aluminum tripolyphosphate, barium metaborate, and calcium iron powder.

3. Anti-rust effect of electrochemical anti-rust paint According to electrochemical corrosion theory, the negative electrode potential is eroded in the corrosion battery. The most commonly used is a zinc-rich primer. ** It is gradually consumed during the protection process, but it is slow. ** is the main anti-rust paint paint anti-rust paint.

Second, the type of metal anti-rust paint 1, red iron anti-rust paint: red iron acrylate anti-rust paint, iron red phenolic anti-rust paint, epoxy ester red iron anti-rust paint, epoxy iron red anti-rust paint, chlorinated Rubber iron red anti-rust paint.

2, micaceous iron oxide anti-rust paint: alkyd cloud iron anti-rust paint, epoxy cloud iron anti-rust paint, chlorinated rubber cloud iron anti-rust paint.

3, ** anti-rust paint: alkyd ** anti-rust paint, epoxy ** anti-rust paint, chlorinated rubber ** anti-rust paint and so on.

4, red Dan antirust paint: red alkyd antirust paint, phenol red Dandan antirust paint, red epoxy anti-rust paint, chlorinated rubber red Dan antirust paint.

5, zinc chrome yellow anti-rust paint: epoxy ester zinc yellow anti-rust paint, epoxy zinc yellow anti-rust paint, chlorinated rubber zinc yellow anti-rust paint.

6, zinc phosphate anti-rust paint: epoxy ester zinc phosphate anti-rust paint, epoxy zinc phosphate anti-rust paint, chlorinated rubber zinc phosphate anti-rust paint.

7, zinc-rich primer: inorganic zinc-rich shop primer, inorganic zinc silicate primer, water-based inorganic zinc-rich primer, epoxy zinc-rich shop primer, epoxy zinc-rich primer.

8, phosphate primer.

9, with rust anti-rust paint: alkyd rust anti-rust paint, epoxy rust anti-rust paint, chlorinated rubber rust anti-rust paint, polyurethane rust anti-rust paint.

The variety of metal anti-rust paints is particularly large. In practical applications, appropriate types of anti-rust paints are selected according to construction requirements for construction support.