The electrochemical behavior of stainless steel (SS) in sulfide and chloride mixtures under different environmental conditions is related to corrosion problems such as those encountered in gas, oil, and pulp and paper industries and under ground pipelines. In many cases, the presence of sulfides is related to the metabolic action of sulfate-reducing bacteria.1
The electrochemical behavior of SS in sulfide and chloride mixtures has been analyzed. Pini and Calvillo2 described two anodic current peaks before the breakdown potential was reached. The authors assigned the first anodic peak to the formation of a ferrous sulfide film later electro-oxidized to elemental sulfur in the potential region of the second current peak.
The deposition of elemental sulfur on SS surfaces in SH2- containing media has also been reported.3
The effect of sulfur compounds on the pitting resistance of SS has been studied.4 The addition of thiosulfate, thiocianate,...
