Principle of ASTM A242 Corten Steel

When trace elements such as phosphorus, copper, chromium and nickel are added to the ASTM A242 corten steel, a protective film with strong adhesion is formed on the surface of the A242 corten steel. That hinders the diffusion and development of rust and protects the matrix underneath the rust layer to slow down its corrosion rate.

The amorphous spinel oxide layer formed between the rust layer and the matrix is compact and has good adhesion with the matrix metal. Because of the existence of this dense oxide film, oxygen and water in the atmosphere are prevented from infiltrating into the ASTM A242 corten steel matrix, the development of rust into the ASTM A242 corten steel material is slowed down, and the atmospheric corrosion resistance of the ASTM A242 corten steel is greatly improved.

ASTM A242 corten steel can make the products corrosion resistant, prolong life, save labor and consumption. ASTM A242 corten steel is also a steel system that can be integrated into modern metallurgical new mechanism and new technology.