Self-passivation of Fe-Cr-PGM alloys in reducing acids studied by electrochemical and electron spectroscopic techniques

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Original languageEnglish
Pages (from-to)301-318
Journal / PublicationApplied Surface Science
Issue number4
Publication statusPublished - 1 Dec 1990
Externally publishedYes


The self-passivation of Fe-40Cr alloys with additions of 0.1 to 0.2% of ruthenium, palladium and platinum in reducing acid solutions is reviewed. Detailed analysis of the surface films formed on these cathodic-modified alloys has been studied by Auger electron spectroscopy and X-ray photoelectron spectroscopy. The role of platinum-group metals in promoting the self-passivation of Fe-40Cr alloys is discussed. Furthermore, the effect of further additions of Mo or V on the self-passivation of Fe-Cr-Ru alloys in hydrochloric acid solution is also examined. © 1990.