Abstract
The corrosion behavior of 304 stainless steel (SS) in the as-received and sensitized conditions has been investigated at room temperature and at 60 °C in the presence of oxidizing ions in 6 and 8 M nitric acid media. Corrosion of 304 SS in nitric acid was far more severe in sensitized condition than in as-received condition. Further, decrease in corrosion resistance was observed with increase in the temperature of nitric acid. The corrosion potential shifted to noble direction with increase in the concentration of nitric acid and the potential shifted further to transpassive potential at 60 °C. Increase in corrosion potential towards transpassive domain led to severe intergranualar attack. Impedance spectra showed two time constant which could be attributed to the redox reaction on the surface of oxide film. However, the effect of oxidizing metal ions was not prominent.
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Priya, R., Mallika, C. & Mudali, U.K. Corrosion Behavior of Sensitized 304 SS in Nitric Acid Medium Containing Oxidizing Ions. Trans Indian Inst Met 67, 459–467 (2014). https://doi.org/10.1007/s12666-013-0366-3
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DOI: https://doi.org/10.1007/s12666-013-0366-3