Metal protection method

1. Change the internal structure of the metal (such as alloying); 2. Cover the metal surface with protective layer; 3. Electrochemical protection method: Cathodic protection method with external power supply, Cathodic protection method for sacrificial anode; 4. Corrosion inhibitor law.

Metal surface engineering technology is a technology that can change the characteristics of metal surfaces to prevent metal corrosion, improve metal fatigue strength and stress corrosion resistance. In China, the application of this technology can be traced back to ancient times thousands of years ago.