Nitesh Kumar et al., 2014

Abstract

The corrosion resistance of austenitic stainless steel grade 316 were performed in 1 M hydrochloric acid solution using the electrochemical potentiostatic polarization method. The result showed the more active corrosion reactions in presence of chloride ion results in pitting corrosion observed on the metal surface. The potential range of passivity was shortened and both the pitting potential and protection potential shifted towards the active direction. Potentiostatic polarization method was used for the pitting corrosion investigation. The electrochemical corrosion reactions exhibited both the passive and active corrosion reactions characteristics. The acids at the intermediate concentrations show more obvious active corrosion reactions; while in the concentrated form they were relatively passive—the passivity that was associated with the oxidizing nature of the concentrated acids