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Journal of Chinese Society for Corrosion and protection  2026, Vol. 46 Issue (3): 671-679    DOI: 10.11902/1005.4537.2025.247
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A Review on environmental degradation of Alumina-forming Austenitic Stainless Steel in Liquid Lead-bismuth Eutectic
ZHANG Xinrui1,2, XUE Baoquan2, TAN Jibo2(), ZHANG Ziyu2, GAO Jun3, WU Xinqiang2
1.School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
2.CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
3.State Key Laboratory of Advanced Nuclear Energy Technology, Nuclear Power Institute of China, Chengdu 610213, China
Cite this article: 

ZHANG Xinrui, XUE Baoquan, TAN Jibo, ZHANG Ziyu, GAO Jun, WU Xinqiang. A Review on environmental degradation of Alumina-forming Austenitic Stainless Steel in Liquid Lead-bismuth Eutectic. Journal of Chinese Society for Corrosion and protection, 2026, 46(3): 671-679.

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Abstract  

Lead-bismuth eutectic (LBE) has emerged as the preferred coolant material for lead-cooled fast reactors owing to its good physical properties and chemical stability. However, many metallic structural materials are prone to degradation in liquid LBE at high temperatures. Among others, alumina-forming austenitic stainless steel (AFA) exhibits excellent corrosion resistance and mechanical properties. Thus, it has been recognized as a promising candidate structural material for lead-cooled fast reactors. This paper presents an overview of AFA stainless steel. The effect of chemical composition, oxygen concentration and pre-oxidation treatment on the corrosion behavior and the mechanical behavior of AFA steel in liquid LBE are summarized. The mechanism underlying liquid metal corrosion and liquid metal induced embrittlement of AFA stainless steel are also discussed. The existing challenges in current research and the future research issues are outlined.

Key words:  alumina-forming austenitic stainless steel      lead-bismuth eutectic      liquid metal embrittlement      liquid metal corrosion     
Received:  03 August 2025      32134.14.1005.4537.2025.247
ZTFLH:  TG174  
Fund: National Natural Science Foundation of China(U23B2074);National Natural Science Foundation of China(52301113);Liaoning Provincial Excellent Youth Foundation(2024JH3/10200020);Strategic Priority Research Program of the Chinese Academy of Sciences(XDA0410000);Funding from Shi Changxu Innovation Center for Advanced Materials(SCXKFJJ202208)
Corresponding Authors:  TAN Jibo, E-mail: jbtan10s@imr.ac.cn

URL: 

https://www.jcscp.org/EN/10.11902/1005.4537.2025.247     OR     https://www.jcscp.org/EN/Y2026/V46/I3/671

Fig.1  Oxyen concentration dependent Oxides film of AFA steel tested in liquid LBE[31-33]: (a) oxides thinckness, (b) percentage of protected surface
Fig.2  Ni content dependent oxide thickness of AFA steel tested in liquid LBE[18,34,35]
Fig.3  Slow tensile test data of AFA steel tested in Air or liquid LBE/Pb[40-42]: (a) temperature dependent total elongation, (b) strain rate dependent total elongation
Fig.4  Schematic diagram of the formation mechanism of the oxidation layer of AFA steel in high-temperature liquid LBE[31]: (a) 10-6 % oxygen, (b) 10-3 % oxygen
Fig.5  Schematic diagram of interactions between dissolution corrosion and precipitation in AFA steel exposed in high temperature LBE[51]: (a) initial stage of dissolution corrosion, (b) long-term dissolution corrosion
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