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TEM Characterization of Corrosion Products Formed on a Stainless Steel-Zirconium Alloy

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Abstract

The corrosion products formed on a stainless steel-15Zr (SS-15Zr) alloy have been characterized by transmission electron microscopy (TEM) and energy dispersive x-ray spectroscopy (EDS). Examination of alloy particles that were immersed in 90’C deionized water for two years revealed that different corrosion products were formed on the stainless steel and intermetallic phases. Two corrosion products were identified on an austenite particle: trevorite (NiFe2O4) in the layer close to the metal and maghemite (Fe2O3) in the outer layer. The corrosion layer formed on the intermetallic was uniform, adherent, and amorphous. The EDS analysis indicated that the layer was enriched in zirconium when compared with the intermetallic composition. High-resolution TEM images of the intermetallic-corrosion layer interface show an interlocking metal-oxide interface which may explain the relatively strong adherence of the corrosion layer to the intermetallic surface. These results will be used to evaluate corrosion mechanisms and predict long-term corrosion behavior of the alloy waste form.

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Authors and Affiliations

  1. Chemical Technology Division, Argonne National Laboratory, Argonne, IL, 60439, USA

    J. S. Luo & D. P. Abraham

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  1. J. S. Luo
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  2. D. P. Abraham
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Correspondence to J. S. Luo.

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Luo, J.S., Abraham, D.P. TEM Characterization of Corrosion Products Formed on a Stainless Steel-Zirconium Alloy. MRS Online Proceedings Library 608, 583 (1999). https://doi.org/10.1557/PROC-608-583

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  • DOI: https://doi.org/10.1557/PROC-608-583

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