A new communication method based on RS- 485 interface is introduced in this paper, which combined with the develop- ment for detection system of cathodic protection current used in mitigate corrosion of the underwater steel stack.

The impressed current cathodic protection system for the oil field region canbe considered as a constant current field approximately and the potential distribution inthe region obeys the Polsson Equation.

A 1∶100 physical scale model of a vessel is established and used to study the distribution of the potential in the impressed current cathodic protection(ICCP) system of a hull′s double-zones.

The main contents include: choosing of anti-corrosion coating technology and construction, comparison and choosing of cathodic protection method, adoption of impressed current cathodic protection method, selection of current density and calculating of protection current, selection of the plus current equipment and materials, as well as the system installation.

Application of applied current cathodic protection technique for steel pipe pile structures in seaport engineering;

Electrochemical corrosion of metal and principle of the applied current cathodic protection are expounded.

The corrosion currents of propeller revolution modulation and the currents which results from impressed current cathodic protection system (ICCP) are two important sources of ELFE.

Based on engineering examples,the paper introduces the design process of forced current cathode protection technology used in long-distance water delivery steel pipe and analyzes and discusses some technical problems encountered du.