Influence of ethanol, acidity and chloride concentration on the corrosion resistance of AISI 316L stainless steel

Journal of the Brazilian Chemical Society

Universidade Federal de Alfenas, Alfenas, Brazil¹  Ferreira, Elivelton A.¹  Universidade Estadual Paulista (UNESP), Araraquara, Brazil¹  Fugivara, Cecílio S.¹  Benedetti, Assis V.¹  Della Noce, Rodrigo¹ 

关键词: 316L stainless steel;    electrochemical impedance spectroscopy;    corrosion resistance;    polarization curves;   

DOI  :  10.5935/0103-5053.20130052

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The influence of ethanol, sulfuric acid and chloride on the corrosion resistance of 316L stainless steel was investigated by means of polarization curves and electrochemical impedance spectroscopy measurements. Over the studied range, the steel corrosion potential was independent of H2SO4 and NaCl concentrations in aqueous solution. On the other hand, in solution containing 65 wt.% ethanol and 35 wt.% water, the corrosion potentials were higher than those obtained in aqueous solution. Besides, the steel corrosion potential was affected by the addition of H2SO4 and NaCl in solution. In solutions with and without ethanol, plus 0.35 wt.% NaCl, the presence of 1 wt.% H2SO4 inhibited the appearance of pitting corrosion.

【 授权许可】

Unknown