Parameter Sensitivity Analysis of Pit Initiation at Single Sulfide Inclusions in Stainless Steel

摘要

Recently,there have been numberous studies utilizing mathematical modeling to study the process of pit initation.A model previously defined by Webb and Alkire (J.Electrochem.Soc.,149,B286,2002) which hypothesized that pit initiation occurs by depassivation of the stainless steel due to an accumulation of thiosulfate ions above a critical concentration in the presence of chloride,and that the rate of inclusion dissolution is catalyzed by chlorice,was solved using a finite difference method by Kamrunnahar et al.at the University of Illinois.