1. Add some rare elements and other ingredients to the ordinary steel to change the internal structure of the metal.
2. Cover the metal surface with a protective layer to isolate the surrounding corrosive medium to prevent corrosion. For example, the surface of the steel mesh is coated with engine oil, petroleum jelly, paint or non-metallic materials such as enamel and pvc; and electroplated, hot-plated, sprayed, etc., coated with a layer of zinc, chromium, nickel, etc. Chemically form a fine and stable oxide film on the steel surface. For example, a fine black ferrotitan oxide film is formed on the surface of steel parts such as machine parts and guns.
3. Regularly wipe metal equipment or place desiccant in precision instruments and add a small amount of corrosion inhibitor to the corrosive medium to slow down the corrosion rate.
