CORROSION PREVENTION METHOD FOR HEAT EXCHANGER NARROW PIPE MADE OF COPPER ALLOY

摘要

PROBLEM TO BE SOLVED: To provide a corrosion prevention method for a heat exchanger narrow pipe made of a copper alloy, which has a high effect for preventing corrosion of the heat exchanger narrow pipe made of the copper alloy.;SOLUTION: The corrosion prevention method for the heat exchanger narrow pipe made of the copper alloy which is in contact with the water includes adding an oxidizing agent having higher oxidation ability than that of oxygen and/or iron salt to the water. Oxidation-reduction potential of the water or natural electrode potential of the copper alloy is measured, and the amount of the oxidizing agent and/or the iron salt to be added is preferably controlled based on the measurement result. The oxidizing agent to be used includes chlorine, sodium hypochlorite, chlorine dioxide and hydrogen peroxide.;COPYRIGHT: (C)2014,JPO&INPIT