| Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel | |
| Shi, Linjun1,2; Yang, Xiuying3; Song, Yingwei1; Liu, Dan1,2; Dong, Kaihui1; Shan, Dayong1; Han, En-Hou1 | |
| Corresponding Author | Song, Yingwei(ywsong@imr.ac.cn) |
| 2019-09-01 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 35Issue:9Pages:1886-1893 |
| Abstract | Galvanic corrosion of tri-metallic couples is more complicated than that of bi-metallic couples. In this study, the effect of the pH of corrosive media on the galvanic corrosion of 2024 Al alloy/Q235 mild steel/304 stainless steel tri-metallic couples was investigated using potentiodynamic polarization, scanning electron microscopy, scanning vibrating electrode technique and a multi-channel galvanic corrosion meter. The results show that 2024 always acts as the only anode in 3.5 wt% NaCl at pH 5.56, 9.72 and 12.0, while both Q235 and 2024 act as anodes at pH 2.39 in the initial stage and then the role of Q235 changes at longer coupling time, which can be attributed to the effect of pH on the surface film of 2024. It is also found that the galvanic current density of a hri-metallic couple is the superposition of two bi-metallic couples when cathodic reactions are controlled by the diffusion of oxygen, otherwise it is smaller than that of the sum of two bi-metallic couples. The localized corrosion instead of uniform corrosion of anodic metal is accelerated by galvanic corrosion. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | Galvanic corrosion Tri-metallic couples Corrosive media Scanning vibrating electrode technique Zero resistance ammeter |
| Funding Organization | National Key Research and Development Program of China ; Natural Science Foundation of Liaoning Province |
| DOI | 10.1016/j.jmst.2019.04.022 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2017YFB0702100] ; Natural Science Foundation of Liaoning Province[20170540666] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000475870600010 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/134532 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Song, Yingwei |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 3.Shenyang Inst Technol, Fushun 113122, Peoples R China |
| Recommended Citation GB/T 7714 | Shi, Linjun,Yang, Xiuying,Song, Yingwei,et al. Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(9):1886-1893. |
| APA | Shi, Linjun.,Yang, Xiuying.,Song, Yingwei.,Liu, Dan.,Dong, Kaihui.,...&Han, En-Hou.(2019).Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(9),1886-1893. |
| MLA | Shi, Linjun,et al."Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.9(2019):1886-1893. |
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