Cathodic protection (CP) is a technique to control the
corrosion of a metal surface by making it work as a
cathode of an
electrochemical cell. This is achieved by placing in contact with the metal to be protected another more easily corroded metal to act as the anode of the
electrochemical cell. Cathodic protection systems are most commonly used to
Cathodic protection can be, in some cases, an effective method of preventing
stress corrosion cracking.