In this work

the anti-corrosion performance of 304 stainless steel (304SS)in HCl and NaCl media was evaluated after the black and blue-black oxide skin was electrolytically cleaned.The dynamic potential polarization technique was employed to measure pitting breakdown potentials of 304 stainless steel in both solutions.The long-term anti-corrosion behavior of 304SS in 0.5 mol·L-1 HCl was evaluated with the potential step polarization technique.The result showed that 304SS demonstrated enhanced corrosion resistance.It was found that Mn element was enriched to a great extent about 10% (mass) which was 9 times larger than that in 304 stainless steel matrix based on the energy dispersive spectrum (EDS) analysis.At the end

the possible role of Mn richness in enhanced corrosion resistance of 304 stainless steel was discussed.