SURFACE POTENTIAL MEASUREMENT UNDER WATERLINE FOR SHIP′S IMPRESSED CURRENT CATHODIC PROTECTION SYSTEM BASED ON PHYSICAL SCALE MODEL

A physical scale modeling technique has been used to study the influecing factors which determine the distribution of shipbull surface potentials for impressed current cathodic protection(ICCP).Results from a single-zone system showed that the shape of potential profile was determined by anode location and its level by the setting of reference electrode.The potential was optimized by increasing the number of anode.It is proved that the use of physical scale model provides a practical and flexible tool for the collection of data suitable for the further development of design criteria for ship ICCP.