Difference between anticorrosive coating and antirust coating

2022-09-27

There are many kinds of paint products on the market, and many of them will be compared and differentiated when purchasing and using. For example, there will be a certain comparison between industrial paint and home decoration paint in some indicators or parameters, which can help us better select the appropriate paint products. So, what are the main differences between anti-corrosion coating and anti-rust coating?

1、 Anti-rust coating is a coating that can protect metal surface from chemical or electrochemical corrosion of atmosphere, seawater, etc. It can be divided into physical and chemical properties. The former relies on the appropriate pigments and paints to form a dense paint film to prevent the invasion of corrosive substances, such as iron red, aluminum powder, graphite antirust paint, etc; The latter relies on the chemical rust inhibition effect of antirust pigments, such as red lead, zinc yellow antirust paint, etc. Used for rust prevention of bridges, ships, pipelines and other metals.

2、 Antirust pigment is an important part of antirust paint. Physical anti-rust pigments are a kind of pigments with relatively stable chemical properties. They rely on their physical properties, stable chemical properties, hard texture, fine particles, and excellent filling properties to improve the density of the paint film and reduce the permeability of the paint film, thus playing a role in anti-rust. Iron oxide red belongs to this kind of material, and the rust resistance of metal aluminum powder is due to the scale structure of aluminum powder, which forms a tight paint film, and has a strong ability to reflect ultraviolet light, which can improve the anti-aging ability of the paint film.

3、 Anti-corrosion paint is a kind of paint used on the surface of objects to protect the interior of objects from corrosion. It is a kind of paint commonly used in industrial construction and widely used in aviation, shipbuilding, chemical industry, oil pipeline, steel structure, bridge, oil brick well platform and other fields. The paint can be used under harsh conditions, and has good durability and weather resistance. It can be used for 10 or more years under harsh conditions such as ocean and underground, even in acid, alkali, salt and solvent media, and under certain temperature conditions, it can also be used for more than 5 years.

4、 Many anticorrosive coatings cannot be directly applied to the metal surface with rust to achieve antirust effect; Instead, the rust layer on the metal surface must be scraped off first, and then coated with anticorrosive paint, which can play a role in corrosion prevention, but not used.

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