Abstract
Recently, anti-corrosive pipe lined with rubber or polyethylene is used for sea water system, especially sea water cooling system in many vessels.
In such system using lining pipe, pipes without lining are very often installed near pumps and heat exchangers in order to protect them. They are called sacrificial pipe.
This paper shows the effect of the sacrificial pipe and gives the instruction for its installation. The instruction is based on two activities of the sacrificial pipe, one of which is sacrificial anode and the other is supplier of ferrous ion.
