The electrical impedance response of steel surface oxide layers in molten lead-bismuth eutectic

James F. Stubbins; Alan Michael Bolind; Xiang Chen

doi:10.1016/j.jnucmat.2008.02.091

The electrical impedance response of steel surface oxide layers in molten lead-bismuth eutectic

James F. Stubbins, Alan Michael Bolind, Xiang Chen

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Stainless steel 316L samples were preoxidized and then immersed in molten lead-bismuth eutectic (LBE) alloy at 200 °C. The changes in their electrical impedance responses were observed over time. Negligible impedance magnitudes were observed at first, followed by a rapid increase to thousands of ohm-cm². The impedance response is sensitive to changes in the immersed sample area. Micro-indentations on samples caused their impedance magnitudes to decrease initially, but the magnitudes recovered within a few days. SEM analysis showed that the indentations were still present and visible even after the recovery of impedance response, demonstrating that the physical features of the oxide layers which govern the electrical response must be smaller than the micrometer length scale.

Original language	English
Pages (from-to)	243-252
Number of pages	10
Journal	Journal of Nuclear Materials
Volume	377
Issue number	1
DOIs	https://doi.org/10.1016/j.jnucmat.2008.02.091
State	Published - Jun 30 2008
Externally published	Yes

Funding

The authors would like to thank Ning Li and R. Scott Lillard from Los Alamos National Laboratory for their support and research guidance and contributions. Also, Eric P. Loewen (now at GE Energy) contributed valuable experimental expertise. This research was funded by a grant from Los Alamos National Laboratory (Contract No. 57384-001-02 8).

Funders	Funder number
Los Alamos National Laboratory	57384-001-02 8

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10.1016/j.jnucmat.2008.02.091

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abstract = "Stainless steel 316L samples were preoxidized and then immersed in molten lead-bismuth eutectic (LBE) alloy at 200 °C. The changes in their electrical impedance responses were observed over time. Negligible impedance magnitudes were observed at first, followed by a rapid increase to thousands of ohm-cm2. The impedance response is sensitive to changes in the immersed sample area. Micro-indentations on samples caused their impedance magnitudes to decrease initially, but the magnitudes recovered within a few days. SEM analysis showed that the indentations were still present and visible even after the recovery of impedance response, demonstrating that the physical features of the oxide layers which govern the electrical response must be smaller than the micrometer length scale.",

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The electrical impedance response of steel surface oxide layers in molten lead-bismuth eutectic

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