| Galvanic corrosion mechanism of Ti-Al coupling: the impact of passive films on the coupling effect | |
| Dong, Kaihui1,2,3; Song, Yingwei1,2,3; Chang, Fuchun1,2; Han, En-Hou2,3 | |
| Corresponding Author | Song, Yingwei(ywsong@imr.ac.cn) |
| 2023-09-10 | |
| Source Publication | ELECTROCHIMICA ACTA
 |
| ISSN | 0013-4686 |
| Volume | 462Pages:14 |
| Abstract | The light metals of titanium and aluminum are often used together, so the risk of galvanic corrosion is inevitable. However, the passive films on both metals will change during the galvanic corrosion process, which affects the coupling effect. Thus, this work aims to investigate the variation of passive films with increasing galvanic corrosion time, and further clarify their impact on galvanic corrosion rate. Motto-Schottky (M-S) curves, electrochemical impedance spectroscope (EIS), zero charge potential and XPS were used to characterize the state of the passive films, potentiodynamic polarization and zero resistance ammeter (ZRA) were utilized to analyze the cathodic and anodic reactions on Ti-Al coupling. The results indicate that during galvanic corrosion process the passive film on cathode titanium alloy is transformed from titanium dioxide to low-valent titanium oxide and titanium hydroxide due to hydrogen adsorption behavior, resulting in the increase of defect density in passive film. The passive film on anode aluminum alloy degrades rapidly in the initial galvanic corrosion stage due to the action of Cl- accumulation by non-electrostatic action, also the cathodic reaction on anode aluminum alloy is relatively high under coupled condition, which plays an important role in the high corrosion rate of anode aluminum alloy. |
| Keyword | Galvanic corrosion Titanium alloys Aluminum alloys Passive film Hydrogen adsorption |
| Funding Organization | Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) ; Excellent Graduate Innovation Fund of IMR |
| DOI | 10.1016/j.electacta.2023.142662 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)[311021013] ; Excellent Graduate Innovation Fund of IMR[1193002090] |
| WOS Research Area | Electrochemistry |
| WOS Subject | Electrochemistry |
| WOS ID | WOS:001025286700001 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/178487 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Song, Yingwei |
| Affiliation | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China |
| Recommended Citation GB/T 7714 | Dong, Kaihui,Song, Yingwei,Chang, Fuchun,et al. Galvanic corrosion mechanism of Ti-Al coupling: the impact of passive films on the coupling effect[J]. ELECTROCHIMICA ACTA,2023,462:14. |
| APA | Dong, Kaihui,Song, Yingwei,Chang, Fuchun,&Han, En-Hou.(2023).Galvanic corrosion mechanism of Ti-Al coupling: the impact of passive films on the coupling effect.ELECTROCHIMICA ACTA,462,14. |
| MLA | Dong, Kaihui,et al."Galvanic corrosion mechanism of Ti-Al coupling: the impact of passive films on the coupling effect".ELECTROCHIMICA ACTA 462(2023):14. |
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