Corrosion of F/M steels and austenitic steels in Pb-Mg at different temperatures

•Dissolution is the only corrosion mechanism in all steels exposure to liquid Pb-Mg.•The selective dissolution of Ni in austenitic steels results in FCC-BCC transformation.•The corrosion rate of austenitic steels is controlled by dissolution or diffusion at different temperatures. Pb83Mg17 is expect...

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Bibliographic Details
Published in:Nuclear materials and energy 2024-09, Vol.40, p.101705, Article 101705
Main Authors: Zhao, Li, Zhang, Hongpeng, Liu, Xudong, Wang, Zhiguang, Xu, Hushan, Yao, Cunfeng
Format: Article
Language:English
Subjects:
Austenitic steels
F/M steels
Liquid metal corrosion
Pb-Mg
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Summary:•Dissolution is the only corrosion mechanism in all steels exposure to liquid Pb-Mg.•The selective dissolution of Ni in austenitic steels results in FCC-BCC transformation.•The corrosion rate of austenitic steels is controlled by dissolution or diffusion at different temperatures. Pb83Mg17 is expected to be a potential coolant for lead cooled fast reactors because of its less toxic radioactive products and possible acceptable corrosion rate without additional oxygen control in comparison with LBE. In order to evaluate the compatibility of structural steels and Pb-Mg, two F/M steels (SIMP, T91) and two austenitic steels (316L, 15-15Ti) were tested in Pb-Mg at 350, 450 and 550 °C with exposure time ranging from 100 h to 2000 h in this work. Compared with the slight corrosion or no obvious corrosion of F/M steels, austenitic steels have suffered very serious dissolution corrosion which is significantly influenced by temperature and exposure time. The corrosion rate of austenitic steels is controlled by dissolution or diffusion mechanism at different temperatures.
ISSN:2352-1791
2352-1791
DOI:10.1016/j.nme.2024.101705