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

摘要

PURPOSE: To suppress corrosion causing in a nonpassivated metallic body such as a heat transfer pipe of a boiler by the influence of water. CONSTITUTION: The method of suppressing corrosion includes a stage where the concentration of citric acid contained in water influencing on a nonpassivated metallic body such as a heat transfer pipe of a boiler is set in at least 50 mg/l. Suppressible corrosion by this method is, e.g. local corrosion occurring in the thickness direction of a nonpassivated metallic body.