Investigation on pitting resistance of Sn-containing ferritic stainless steel with solution simulation method

Abstract In this study, Sn 2+ solution simulation method is used to investigate the effect of on pitting corrosion behavior tin-containing ferritic stainless steel 430LX. It found that correlation between E pit and [Sn ] opposite critical potential temperature (CPT) ]. After potentiostatic polarization at a specific potential, correlations become same. The CPT experiment after series steps proves exhibits positive influence only when pH within certain range. All complicated phenomena can be explained by under-potential deposition mechanism. SnO 2 passivation film enhances resistance produced occurs.