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Corrosion Behaviors and Mechanisms of ODS Steel Exposed to Static Pb-Bi Eutectic at 600 and 700 degrees C
Bao Feiyang1,2; Li Yanfen1,2,3; Wang Guangquan2,4; Zhang Jiarong2; Yan Wei1,2,3; Shi Quanqiang2,3; Shan Yiyin1,2,3; Yang Ke1,2; Xu Bin5; Song Danrong5; Yan Mingyu5; Wei Xuedong5
Corresponding AuthorLi Yanfen(yfli@imr.ac.cn)
2020-10-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume56Issue:10Pages:1366-1376
AbstractWith good neutron properties, anti-irradiation performances, heat transfer properties and inherent safety characteristics, liquid lead or Pb-Bi eutectic (LBE) has been a primary candidate coolant for accelerator driven system and advanced nuclear reactors. However, corrosion of structural materials is a critical challenge in the use of liquid lead and LBE in high temperature nuclear reactors. Therefore, research on corrosion compatibility of structural materials with LBE at elevated temperatures is of great significance. In this work, the long-term corrosion experiments in static LBE for a oxide dispersion strengthened (ODS) steel were carried out at 600 and 700 degrees C. The temperature effects on different corrosion behaviors were studied by the analyses of XRD, SEM and EDS, and the underlying mechanisms were clarified. After exposing to LBE at 600 degrees C for up to 2000 h, a typical double-layer oxide scale with the thickness of about 10 mu m was formed on the surface of ODS steel, which was composed of outer layers of Pb-Fe-O and Fe3O4 and inner layer of Fe-Cr-Al spinal. In addition, a thin Al-rich layer was also formed under the inner layer. Due to the protective effect of the relatively dense inner layer and the Al-rich layer, ODS steel showed excellent resistance to LBE corrosion at 600 degrees C with a significantly lower corrosion rate. On the contrary, when exposed to LBE at 700 degrees C, the structure and thickness of the oxide scale formed on the surface of the ODS steel were obviously different. After exposure for 100 h, a dense protective Al2O3 oxide layer with a thickness of about 500 nm was formed, greatly reducing the corrosion rate. With the corrosion time prolonging to 500 h at 700 degrees C, most of Al2O3 layer was still remained. However, a few of nodular-like oxides were formed originated from local weak areas, which broken off the continuity of protective Al2O3 and led to deeper corrosion by LBE.
Keywordadvanced nuclear energy system Pb-Bi eutectic (LBE) oxide dispersion strengthened (ODS) steel high temperature corrosion oxide scale
Funding OrganizationNuclear Power Technology Innovation Center Project of Nuclear Power Institute of China ; National Natural Science Foundation of China ; Institute of Metal Research, Chinese Academy of Science ; Excellent Scholar Funding
DOI10.11900/0412.1961.2020.00035
Indexed BySCI
Language英语
Funding ProjectNuclear Power Technology Innovation Center Project of Nuclear Power Institute of China[HDLCXZX-2019-HD-15-01] ; National Natural Science Foundation of China[U1832206] ; Institute of Metal Research, Chinese Academy of Science[JY7A7A111A1] ; Excellent Scholar Funding
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000571986900006
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140697
Collection中国科学院金属研究所
Corresponding AuthorLi Yanfen
Affiliation1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
4.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215000, Peoples R China
5.Nucl Power Inst China, Chengdu 610005, Peoples R China
Recommended Citation
GB/T 7714
Bao Feiyang,Li Yanfen,Wang Guangquan,et al. Corrosion Behaviors and Mechanisms of ODS Steel Exposed to Static Pb-Bi Eutectic at 600 and 700 degrees C[J]. ACTA METALLURGICA SINICA,2020,56(10):1366-1376.
APA Bao Feiyang.,Li Yanfen.,Wang Guangquan.,Zhang Jiarong.,Yan Wei.,...&Wei Xuedong.(2020).Corrosion Behaviors and Mechanisms of ODS Steel Exposed to Static Pb-Bi Eutectic at 600 and 700 degrees C.ACTA METALLURGICA SINICA,56(10),1366-1376.
MLA Bao Feiyang,et al."Corrosion Behaviors and Mechanisms of ODS Steel Exposed to Static Pb-Bi Eutectic at 600 and 700 degrees C".ACTA METALLURGICA SINICA 56.10(2020):1366-1376.
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