Abstract
In order to understand corrosion behavior, it is important to learn and understand electrochemically. Electrode potential, electrical potential and its variation which is caused by anodic and cathodic reaction balance were explained. Acidity progress in corrosion pits as a accelerator of anodic reactions, and size effect, velocity of sea water, metal salts, microbes as accelerators of cathodic reactions on the stainless steel in sea water are explained electrochemically.