SVET and ToF-SIMS Studies on the Galvanic Corrosion of beta-phase/Aluminum Couple in Aqueous Solutions as a Function of pH
文献类型：期刊论文
| 作者 | Ikeuba, Alexander I.2,3; Zhang, Bo1,2; Ita, Benedict I.3 |
| 刊名 | JOURNAL OF THE ELECTROCHEMICAL SOCIETY
 |
| 出版日期 | 2020-01-28 |
| 卷号 | 167期号:2页码:14 |
| ISSN号 | 0013-4651 |
| DOI | 10.1149/1945-7111/ab6a66 |
| 通讯作者 | Zhang, Bo(bxz011@imr.ac.cn) |
| 英文摘要 | The galvanic corrosion of the beta-phase (Al3Mg2)/Al couple has been studied using electrochemical methods, scanning vibrating electrode technique (SVET) and Time of flight-secondary ion spectroscopy (ToF-SIMS). Polarization tests reveal that Al3Mg2 is anodic relative to pure Al at pH <= 10. Visualization of the current density distribution over the Al3Mg2/Al galvanic couple by SVET reveals that at pH 2, an intense and stochastic anodic current density is evolved from Al3Mg2 while a heavy cathodic current flux is sustained on the surrounding Al matrix. At pH 6 and 10, localized both cathodic and anodic regions are seen on Al3Mg2 indicating its self-dissolution while the surrounding Al matrix remained relatively inert. However, at pH 13, a reversal of polarity occurs and Al3Mg2 becomes cathodic relative to Al. The severity of the galvanic coupling of Al3Mg2 to Al is in the order pH 13 > pH 2 > pH 6 > pH 10. ToF-SIMS analysis reveals that the dealloying of Al3Mg2 in the galvanic couple is by selective dissolution of Mg leading to the deposition of corrosion products dominated by Mg compounds in an acidic and neutral environment. In an alkaline environment, a relatively thin hydroxide rich film is formed. (C) 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. |
| 资助项目 | ministry of science and technology of China[2017YFA0204401] ; National Natural Science Foundation of China[51571201] |
| WOS研究方向 | Electrochemistry ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000517813100001 |
| 出版者 | ELECTROCHEMICAL SOC INC |
| 资助机构 | ministry of science and technology of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/137375]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, Bo |
| 作者单位 | 1.72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Univ Calabar, Dept Pure & Appl Chem, Calabar, Nigeria |
| 推荐引用方式 GB/T 7714 | Ikeuba, Alexander I.,Zhang, Bo,Ita, Benedict I.. SVET and ToF-SIMS Studies on the Galvanic Corrosion of beta-phase/Aluminum Couple in Aqueous Solutions as a Function of pH[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2020,167(2):14. |
| APA | Ikeuba, Alexander I.,Zhang, Bo,&Ita, Benedict I..(2020).SVET and ToF-SIMS Studies on the Galvanic Corrosion of beta-phase/Aluminum Couple in Aqueous Solutions as a Function of pH.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,167(2),14. |
| MLA | Ikeuba, Alexander I.,et al."SVET and ToF-SIMS Studies on the Galvanic Corrosion of beta-phase/Aluminum Couple in Aqueous Solutions as a Function of pH".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 167.2(2020):14. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。