Galvanic corrosion mechanism of Ti-Al coupling: the impact of passive films on the coupling effect

doi:10.1016/j.electacta.2023.142662

IMR OpenIR

	Galvanic corrosion mechanism of Ti-Al coupling: the impact of passive films on the coupling effect
	Dong, Kaihui 1,2,3; Song, Yingwei 1,2,3; Chang, Fuchun 1,2; Han, En-Hou 2,3
通讯作者	Song, Yingwei(ywsong@imr.ac.cn)
	2023-09-10
发表期刊	ELECTROCHIMICA ACTA
ISSN	0013-4686
卷号	462 页码:14
摘要	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.
关键词	Galvanic corrosion Titanium alloys Aluminum alloys Passive film Hydrogen adsorption
资助者	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
收录类别	SCI
语种	英语
资助项目	Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)[311021013] ; Excellent Graduate Innovation Fund of IMR[1193002090]
WOS研究方向	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:001025286700001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178487
专题	中国科学院金属研究所
通讯作者	Song, Yingwei
作者单位	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
推荐引用方式 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.