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The Distribution of Li Ions in the Oxide Film Formed on Zircaloy-4 Corroded in Lithiated Water at 633 K

Institute of materials, Shanghai University, Shanghai 200072, China
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Materials 2020, 13(4), 873; https://doi.org/10.3390/ma13040873 (registering DOI)
Received: 31 December 2019 / Revised: 6 February 2020 / Accepted: 13 February 2020 / Published: 15 February 2020
(This article belongs to the Special Issue Corrosion and Corrosion Inhibition of Metals and Their Alloys)
Transmission electron microscopy (TEM), second ion mass spectrum (SIMS) and atom probe tomography (APT) techniques are used to study the Li ion distribution in the oxide formed on the rolling surface (SN) of Zircaloy-4 corroded in lithiated water with 0.01 M LiOH at 633 K/18.6 MPa. The results showed that the Li ions segregated in the grain boundaries and subgrain boundaries in the oxide film, but nearly no Li ions were found in the oxide around the interface between the oxide and matrix. Finally, we discussed the mechanism of the LiOH influence on the corrosion resistance of Zircaloy-4. View Full-Text
Keywords: Zircaloy-4; corrosion resistance; Li ion segregation; oxide grain boundary; atom probe tomography Zircaloy-4; corrosion resistance; Li ion segregation; oxide grain boundary; atom probe tomography
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Xie, S.; Zhou, B.; Liang, X.; Li, Q.; Liu, W.; Yao, M.; Zhang, J. The Distribution of Li Ions in the Oxide Film Formed on Zircaloy-4 Corroded in Lithiated Water at 633 K. Materials 2020, 13, 873.

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