Unveiling the pitting corrosion mechanism of borated stainless steel in the wet storage environment of spent nuclear fuels
文献类型：期刊论文
| 作者 | Wang, Debin1,2; Cui, Jingping1; Ma, Aili3; Ji, Baoting1,2; Shi, Jian4; Liu, Zhiwen5; Yu, Bo4; Chen, Xingqiu1; Ma, Hui1; Zhang, Suode1 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2024-01-15 |
| 卷号 | 263页码:20 |
| 关键词 | Stainless steel Dual-phase Corrosion Passive film First-principles calculation |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2023.119477 |
| 通讯作者 | Ma, Hui(hma@imr.ac.cn) ; Zhang, Suode(sdzhang@imr.ac.cn) ; Wang, Jianqiang(jqwang@imr.ac.cn) |
| 英文摘要 | Borated stainless steels (BSSs) with high neutron absorbability are promising alloys for the wet storage of spent nuclear fuel. However, consensus on the underlying mechanisms for the effects of B content in BSS and H3BO3 in wet storage environment on the pitting corrosion resistance of BSSs is still lacking. To determine the mecha-nisms, we designed three hypoeutectic BSSs containing 0.6, 1.2 and 1.8 wt.% B and systematically investigated their electrochemical behavior in solutions with various Cl- /H3BO3 ratios through experimental and computa-tional studies. Results revealed that the pitting corrosion resistance of BSS was dependent on the synergistic effect of the pit initiation induced by localized Cr depletion and the pit stable growth caused by microgalvanic effect, causing the pitting corrosion preferentially occurred at the (Cr, Fe)2B/matrix interface. A higher B content increased the density and width while reduced the Cr contents of the Cr-depleted regions, enhancing the sus-ceptibility to pitting initiation. Meanwhile, the strengthened micro-galvanic effect between the (Cr, Fe)2B phase and gamma matrix further facilitated the stable pit growth. For the H3BO3 effect, the first-principles calculations indicated that the competitive adsorption of B(OH)4- to Cl- inhibited pitting initiation in solutions with lower Cl- /H3BO3 ratios. However, as the Cl-/H3BO3 increased, the inhibition effect of the H3BO3 was weakened, and the acidizing effect became the dominant factor deteriorating the corrosion property. Ultimately, based on the Cr depletion-microgalvanic synergetic mechanism, the corrosion resistance of the BSS was significantly improved by tailoring the size and distribution of the (Cr, Fe)2B phase. |
| 资助项目 | National Natural Science Foundation of China[52171163] ; National Natural Science Foundation of China[U1908219] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-2-2] ; National Science and Technology Major Project[J2019 -VI-0019-0134] ; Natural Science Foundation Project of Liaoning Province[2023 -MS -017] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001111772400001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; National Science and Technology Major Project ; Natural Science Foundation Project of Liaoning Province |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Ma, Hui; Zhang, Suode; Wang, Jianqiang |
| 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, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 4.Shenyang Res Inst Foundry, Natl Key Lab Adv Casting Technol, Shenyang 110022, Peoples R China 5.Oxford Instruments Technol China, Floor 1, Bldg 17, 31 Xishiku St, Beijing 100034, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Debin,Cui, Jingping,Ma, Aili,et al. Unveiling the pitting corrosion mechanism of borated stainless steel in the wet storage environment of spent nuclear fuels[J]. ACTA MATERIALIA,2024,263:20. |
| APA | Wang, Debin.,Cui, Jingping.,Ma, Aili.,Ji, Baoting.,Shi, Jian.,...&Wang, Jianqiang.(2024).Unveiling the pitting corrosion mechanism of borated stainless steel in the wet storage environment of spent nuclear fuels.ACTA MATERIALIA,263,20. |
| MLA | Wang, Debin,et al."Unveiling the pitting corrosion mechanism of borated stainless steel in the wet storage environment of spent nuclear fuels".ACTA MATERIALIA 263(2024):20. |
入库方式： OAI收割
来源：金属研究所
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