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Effects of bentonite content on the corrosion evolution of low carbon steel in simulated geological disposal environment
Wei, Xin1; Dong, Junhua1; Chen, Nan2; Yadav, Amar Prasad2,3; Ren, Qiying2; Wei, Jie1; Wang, Changgang1; Ma, Rongyao1; Ke, Wei2
Corresponding AuthorDong, Junhua(jhdong@imr.ac.cn)
2021-03-10
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume66Pages:46-56
AbstractThe effects of bentonite content on the corrosion behavior of low carbon steel in 5 mM NaHCO3 + 1 mM NaCl + 1 mM Na2SO4 solution were investigated by electrochemical measurements combined with X-ray diffraction (XRD) and scanning electron microscopy (SEM). In the initial immersion stage, the cathodic process of low carbon steel corrosion was dominated by the reduction of dissolved oxygen, while it transformed to the reduction of ferric corrosion products with the immersion time. The presence of bentonite colloids could suppress the cathodic reduction of oxygen due to their barrier effect on the diffusion of oxygen. However, the barrier performance of bentonite layer was gradually deteriorated due to the coagulation and separation of bentonite colloids caused by the charge neutralization of iron corrosion products dissolved from the steel substrate. More bentonite colloids could maintain the barrier effect for a long time before it was deteriorated by the accumulation of corrosion products. Conversely, it could lose the performance completely, and the corrosion behavior of low carbon steel reverted to the same as that in the blank solution. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordLow carbon steel Bentonite Electrochemical measurements Corrosion products Corrosion evolution
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.jmst.2020.04.071
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51701222] ; National Natural Science Foundation of China[U1867216 and51471175]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000610200200006
PublisherJOURNAL MATER SCI TECHNOL
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159124
Collection中国科学院金属研究所
Corresponding AuthorDong, Junhua
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Environm Corros Ctr Mat, Inst Met Res, Shenyang 110016, Peoples R China
3.Tribhuvan Univ, Cent Dept Chem, Kathmandu, Nepal
Recommended Citation
GB/T 7714
Wei, Xin,Dong, Junhua,Chen, Nan,et al. Effects of bentonite content on the corrosion evolution of low carbon steel in simulated geological disposal environment[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,66:46-56.
APA Wei, Xin.,Dong, Junhua.,Chen, Nan.,Yadav, Amar Prasad.,Ren, Qiying.,...&Ke, Wei.(2021).Effects of bentonite content on the corrosion evolution of low carbon steel in simulated geological disposal environment.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,66,46-56.
MLA Wei, Xin,et al."Effects of bentonite content on the corrosion evolution of low carbon steel in simulated geological disposal environment".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 66(2021):46-56.
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