Anodic Protection off Austenitic Stainless Steels In Sulfuric Acid-Chloride Media

Abstract

Anodic polarization measurements show that chloride additions up to 0.1 normality do not seriously affect the passive or transpassive dissolution behavior of austenitic stainless steels in sulfuric acid. However, the primary potential for passivation is shifted to more noble values and the critical current for passivation is greatly increased. Stress-corrosion cracking, which occurs at room temperature in 10 normal sulfuric acid with 0.5 normal sodium chloride, is not observed under anodic protection. Hence, anodic protection not only decreases general corrosion but prevents stress-corrosion cracking. 3.8.3