Corrosion Surface Morphology of 13Cr Steel in the Boiler Water Containing Chloride Ions and Formic Acid
摘要
Electrochemical corrosion tests were conducted on 13Cr steel for steam turbine blade material of power plants in the simulated boiler water containing chloride ions (Cl−) and formic acid (HCOOH). The corroded surfaces were observed and analyzed in detail. In the boiler waters containing 100 ppm Cl−, the formation of corrosion products as passivation films on the specimen surfaces inhibited the occurrence of pitting corrosion by the additions of 25–75 ppm HCOOH.