Marine ship undergoes corrosion in various aspects. To raise the level of corrosion suppression, impressed current cathodic protection (ICCP) system is considered to be an optimum solution – fuel cost saving achieved by a smoothier hull surface compared with sacrificial anode system.

The electrical potential is monitored by reference electrodes which are fitted at both port side and starboard side between the anodes and been reflected to the power supply unit. Thus the whole system could continuously defect the electrical potential at the hull/seawater interface and automatically adjust the protection level.