In Situ Multielement XANES Study of Formation and Reduction of the Oxide Film on Stainless Steel
- 1 January 1994
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 141 (1) , L6-L8
- https://doi.org/10.1149/1.2054720
Abstract
The effectiveness of in situ multielement x-ray absorption near edge spectroscopy for studying the passivation of alloys is demonstrated.By simultaneously windowing the appropriate Kalpha fluorescence lines with a 13-element energy-dispersive germanium detector it ispossible to measure concurrently the behavior of different alloying elements during electrochemical polarization. A thin film of stainless steelwas stepped between u20131.5 and +0.4 V (MSE) (the transpassive region of chromium) in a pH 8.4 borate buffer. On the first oxidation, nometal was lost and Fe and Ni showed some oxidation. On reduction, significant Fe and a barely detectable quantity of Ni dissolved. Duringthe second oxidation, some Cr and a smaller fraction of Ni dissolved.Peer reviewed: NoNRC publication: YeKeywords
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