The corrosion of hull structures in seawater is a natural electrochemical reaction taking place in an electrolyte. The impressed Current Cathodic Protection System (ICCP) can effectively prevent electrochemical corrosion of wetted hull structures by forcing all surfaces of the structures to be cathodes by providing external anodes.
The ICCP system eliminates anodic area and forces it to be cathodic by impressing a current equal and opposite to the electrical discharge involved in corrosion. The impressed current is provided by direct electric current source (Potentiostat) with assistance of auxiliary anode mounted on the hull.
The ICCP system has been widely used and achieved great protection against corrosion in all kinds of ships and offshore oil drilling platform, pipework, ports as well as steel piles.