Effects of water content on the corrosion behavior of NiCu low alloy steel emb e dde d in compacte d GMZ b entonite
文献类型：期刊论文
| 作者 | Dhakal, Madhusudan1,2; Wei, Xin1,2; Oli, Hari Bhakta1,2; Chen, Nan1; Sun, Yupeng1,2; Pokharel, Durga Bhakta1,2; Ren, Qiying1; Dong, Junhua1,2; Ke, Wei3 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 222页码:94-110 |
| 关键词 | Low alloy steel Bentonite Water content Corrosion evolution Electrochemical measurement |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2024.08.070 |
| 通讯作者 | Wei, Xin(xwei@imr.ac.cn) ; Dong, Junhua(jhdong@imr.ac.cn) |
| 英文摘要 | Buffer material and metal disposal containers are the key engineering barriers in the geological disposal of high-level radioactive waste. The durability of disposal containers largely depends on the water content in buffer material. This work focused on investigating the corrosion evolution of NiCu low alloy steel in compacted GMZ bentonite with different water contents for 270 d by using weight loss, electrochemical measurements, and various methods for analyzing corrosion products. As the water content increased from 13 % to 20 %, the water in the bentonite transformed from an unsaturated to a critical saturated state, and the corrosion rate of NiCu steel clearly increased. In these two systems, the oxygen could migrate to the thin liquid film on the steel surface through the air pores in the bentonite in the gas phase and undergo cathodic reduction. Meanwhile, it oxidized the ferrous hydrolysis products into ferric corrosion products and formed a rust layer, which could block the diffusion of oxygen. At that moment, the cathodic process of NiCu steel corrosion changed to rust reduction. When the water content continually increased to 30 % and 40 %, the compacted bentonite was in a saturation state, and the corrosion rate of NiCu steel was significantly decreased. This was because most pores among the bentonite particles were occupied by a large amount of free water, which hindered the diffusion of oxygen and inhibited its cathodic reduction. Furthermore, it restrained the oxidation of ferrous corrosion products, which greatly weakened the cathodic depolarization of rust, leading to the cathodic process being dominated by the hydrogen evolution reaction. (c) 2025 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[52173304] ; National Natural Science Foundation of China[U1867216] ; National Key R&D Program of China[2022YFB3207600] ; China Scholarship Council[2018SLJ014508] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001409298800001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Key R&D Program of China ; China Scholarship Council |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wei, Xin; Dong, Junhua |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Environm Corros Ctr Mat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dhakal, Madhusudan,Wei, Xin,Oli, Hari Bhakta,et al. Effects of water content on the corrosion behavior of NiCu low alloy steel emb e dde d in compacte d GMZ b entonite[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2025,222:94-110. |
| APA | Dhakal, Madhusudan.,Wei, Xin.,Oli, Hari Bhakta.,Chen, Nan.,Sun, Yupeng.,...&Ke, Wei.(2025).Effects of water content on the corrosion behavior of NiCu low alloy steel emb e dde d in compacte d GMZ b entonite.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,222,94-110. |
| MLA | Dhakal, Madhusudan,et al."Effects of water content on the corrosion behavior of NiCu low alloy steel emb e dde d in compacte d GMZ b entonite".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 222(2025):94-110. |
入库方式： OAI收割
来源：金属研究所
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