Effects of bentonite content on the corrosion evolution of low carbon steel in simulated geological disposal environment

doi:10.1016/j.jmst.2020.04.071

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	Effects of bentonite content on the corrosion evolution of low carbon steel in simulated geological disposal environment
	Wei, Xin 1; Dong, Junhua 1; Chen, Nan 2; Yadav, Amar Prasad 2,3; Ren, Qiying 2; Wei, Jie 1; Wang, Changgang 1; Ma, Rongyao 1; Ke, Wei 2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2021-03-10
卷号	66 页码:46-56
关键词	Low carbon steel Bentonite Electrochemical measurements Corrosion products Corrosion evolution
ISSN号	1005-0302
DOI	10.1016/j.jmst.2020.04.071
通讯作者	Dong, Junhua(jhdong@imr.ac.cn)
英文摘要	The 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.
资助项目	National Natural Science Foundation of China[51701222] ; National Natural Science Foundation of China[U1867216 and51471175]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000610200200006
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159123]
专题	金属研究所_中国科学院金属研究所
通讯作者	Dong, Junhua
作者单位	1.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
推荐引用方式 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.