METHOD FOR SUPPRESSING CORROSION OF NONPASSIVATED METALLIC BODY, AND METHOD FOR SUPPRESSING CORROSION OF BOILER

摘要

PROBLEM TO BE SOLVED: To suppress local corrosion occuring in a nonpassivated metallic body such as a heat transfer tube of a boiler caused by the influence of moisture. SOLUTION: The method for suppressing corrosion includes a stage where the pH of moisture giving an influence on a nonpassivated metallic body such as a heat transfer tube of a boiler is set in the range of 11 to 12.5. In this method, the pH of the moisture is preferably set in the above range in accordance with the concentration of dissolved oxygen in the moisture.