The anti-corrosion principle of general anti-corrosion coatings lies in the direction of chemistry, physics and electrochemistry. The following is a detailed explanation:

The chemical principle of anti-corrosion

The chemical principle of anti-corrosion is to neutralize harmful acid-base substances into neutral and harmless substances to protect the materials in the anti-corrosion coating from corrosive substances. Some amphoteric compounds, such as aluminum hydroxide, barium hydroxide and zinc oxide, are often added to anti-rust coatings. These substances can easily react with acid and alkali harmful substances to achieve anti-corrosion effects.

The physical principle of anti-corrosion

The physical principle of anti-corrosion is to isolate the protected material from external corrosive substances by anti-corrosion coating. The physical principle of anti-rust paint is to use a film-forming agent to obtain a dense anti-corrosion coating to isolate the damage of the anti-corrosion effect on the protected material. For example, lead-containing paint and oil can form lead soap to ensure the anti-corrosion coating. Compactness.

Electrochemical effect of corrosion protection

The electrochemical effect of anti-corrosion refers to the addition of some special substances to the anti-rust paint, so that when moisture and oxygen pass through the anti-rust paint, they will react to form anti-corrosion ions, which will passivate the surface of metals such as steel and prevent metal ions from deteriorating. Dissolution, to achieve the purpose of anti-corrosion, the most common of this special substance is chromate.