Abstract
The pitting corrosion behavior of 13Cr steel was investigated in simulated boiler waters containing chloride ions (Cl−) and sulfate ions (SO42−) using potentiodynamic and potentiostatic polarization tests in addition to pit morphology analysis. The presence of 100ppm Cl− in the water caused pitting corrosion of the steel. Pit initiation was inhibited by the addition of 50ppm or 100ppm SO42− into the water containing 100ppm Cl−. Pit growth was also suppressed by the presence of 50ppm SO42− in the water with 100ppm Cl−; however, it was conversely promoted in the presence of 100ppm SO42−.
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