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Corrosion Behaivour of X65 Low Carbon Steel During Redox State Transition Process of High Level Nuclear Waste Disposal
Liu Canshuai1,2; Tian Zhaohui2; Zhang Zhiming1; Wang Jianqiu1; Han En-Hou1
Corresponding AuthorWang Jianqiu(wangjianqiu@imr.ac.cn)
2019-07-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume55Issue:7Pages:849-858
AbstractDomestic and foreign researches on the corrosion behavior of low carbon steel canister in high level nuclear waste geological repositories focus on the initial aerobic stage and the later anaerobic stage, while few researches have been reported on the corrosion behavior during the disposal transition period. The long term electrochemical corrosion behavior of X65 low carbon steel in 80 degrees C Gaomiaozi bentonite saturated with anaerobic Beishan groundwater has been studied by electrochemical measurement system in anaerobic glovebox constructed independently. The results indicated that the open circuit potential of X65 low carbon steel decreased gradually during 150 d, while the electrochemical impedance of the corrosion film increased with immersion time. Pitting corrosion occurred at the beginning of immersion tests, and finally transformed into general corrosion. Morphologies, compositions, and phases of the corrosion film formed on the carbon steel surface were examined by SEM, EDS and mu-XRD. The results showed that the corrosion film was mainly composed of blocks, slices, rods and swellings. The elemental distribution in the corrosion film was uniform, and the phases were composed of magnetite and hematite. The average corrosion rates were detected by weight loss measurement, which decreased from 195.88 mu m/a to 20.58 mu m/a. The corrosion rates (V) followed a power function pattern V=8.34t(-0.88), indicating that the film growth process was controlled by oxygen diffusion.
Keywordgeological dispodal low carbon steel corrosion electrochemical disffusion
Funding OrganizationKey Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences
DOI10.11900/0412.1961.2018.00481
Indexed BySCI
Language英语
Funding ProjectKey Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDY-SSWJSC012] ; Key Program of the Chinese Academy of Sciences[ZDRW-CN-2017-1]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000471268000005
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/134203
Collection中国科学院金属研究所
Corresponding AuthorWang Jianqiu
Affiliation1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China
2.Suzhou Nucl Power Res Inst Co Ltd, Suzhou 215008, Peoples R China
Recommended Citation
GB/T 7714
Liu Canshuai,Tian Zhaohui,Zhang Zhiming,et al. Corrosion Behaivour of X65 Low Carbon Steel During Redox State Transition Process of High Level Nuclear Waste Disposal[J]. ACTA METALLURGICA SINICA,2019,55(7):849-858.
APA Liu Canshuai,Tian Zhaohui,Zhang Zhiming,Wang Jianqiu,&Han En-Hou.(2019).Corrosion Behaivour of X65 Low Carbon Steel During Redox State Transition Process of High Level Nuclear Waste Disposal.ACTA METALLURGICA SINICA,55(7),849-858.
MLA Liu Canshuai,et al."Corrosion Behaivour of X65 Low Carbon Steel During Redox State Transition Process of High Level Nuclear Waste Disposal".ACTA METALLURGICA SINICA 55.7(2019):849-858.
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