Cell

In corrosion processes, a cell is a source of electrical current that is responsible for corrosion. It consists of an anode and a cathode immersed in an electrolyte and electrically bonded together. The anode and cathode may be separate metals or dissimilar areas on the same metal. They will develop a difference in potential that causes current to flow and corrosion to occur at the anode. Because this cell involves an electrolyte in corrosion processes, it is referred to as an electrolytic cell.