ABSTRACT
Corrosion is an electrochemical process governed by the universal laws of nature. Many metals suffer at least one source of corrosion degradation during their service life; it is a matter of time and exposure. Several protection schemes can reduce/control the corrosion process but cannot eliminate it completely. Take for example steel metal: it is a manmade material produced by applying energy to convert raw iron materials to steel metal. Therefore, the steel metal is not stable, and once protection ends and exposure reaches the steel surface, the metal steel will easily turn to iron oxide again.
