| Variations of galvanic currents and corrosion forms of 2024/Q235/304 tri-metallic couple with multivariable cathode/anode area ratios: Experiments and modeling | |
| Shi, Linjun1,2; Song, Yingwei1; Zhao, Pingping1,2; Wang, Haitao1; Dong, Kaihui1; Shan, Dayong1; Han, En-Hou1 | |
| Corresponding Author | Song, Yingwei(ywsong@imr.ac.cn) |
| 2020-11-01 | |
| Source Publication | ELECTROCHIMICA ACTA
 |
| ISSN | 0013-4686 |
| Volume | 359Pages:15 |
| Abstract | Tri-metallic galvanic corrosion is inevitable in practical applications, but relevant investigations are far from sufficient. In this study, a mathematical model based on the Butler-Volmer equation and a finite element model (FEM) of tri-metallic galvanic corrosion were built and validated, which can reasonably predict galvanic corrosion of tri-metallic couples. Simulation and experimental results indicate that galvanic current density and galvanic potential of the tri-metallic couple of 2024 aluminum alloy/Q235 carbon steel/304 stainless steel change with the cathode/anode area ratios in a power function relationship and logarithmic relationship, respectively in 3.5 wt% NaCl. Besides, galvanic corrosion not only accelerates the dissolution of 2024 Al alloy but also transforms its corrosion form. The uncoupled 2024 Al alloy presents pitting corrosion, but the coupled 2024 Al alloy shows typical intergranular corrosion (IGC) morphology. (C) 2020 Elsevier Ltd. All rights reserved. |
| Keyword | Tri-metallic galvanic corrosion Cathode/anode area ratio Intergranular corrosion Mathematical model FEM |
| Funding Organization | National Key Research and Development Program of China |
| DOI | 10.1016/j.electacta.2020.136947 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2017YFB0702100] |
| WOS Research Area | Electrochemistry |
| WOS Subject | Electrochemistry |
| WOS ID | WOS:000575853200013 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/140851 |
| 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, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| Recommended Citation GB/T 7714 | Shi, Linjun,Song, Yingwei,Zhao, Pingping,et al. Variations of galvanic currents and corrosion forms of 2024/Q235/304 tri-metallic couple with multivariable cathode/anode area ratios: Experiments and modeling[J]. ELECTROCHIMICA ACTA,2020,359:15. |
| APA | Shi, Linjun.,Song, Yingwei.,Zhao, Pingping.,Wang, Haitao.,Dong, Kaihui.,...&Han, En-Hou.(2020).Variations of galvanic currents and corrosion forms of 2024/Q235/304 tri-metallic couple with multivariable cathode/anode area ratios: Experiments and modeling.ELECTROCHIMICA ACTA,359,15. |
| MLA | Shi, Linjun,et al."Variations of galvanic currents and corrosion forms of 2024/Q235/304 tri-metallic couple with multivariable cathode/anode area ratios: Experiments and modeling".ELECTROCHIMICA ACTA 359(2020):15. |
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