Corrosion Resistance Evaluation of Ferrite Stainless Steel in Hot Water Environment

Abstract

In order to clarify the applicable conditions, the corrosion resistance of SUS445 as a pipe in which 80℃ hot water flows was evaluated under the condition simulating an actual environment. In case of combination with a resin joint, pitting corrosion may occur at the chloride ion concentration of 65mg/L and more when the residual chlorine concentration is 1.0 mg/L. Same in case of combination with a resin joint, the chloride ion concentration at which pitting corrosion may occur is 110mg/L and more when the residual chlorine concentration is 0.5 mg/L. In case of combination with a brass joint, pitting corrosion may occur at the chloride ion concentration of 1000mg/L and more when the residual chlorine concentration is 1.0mg/L.