Variations of galvanic currents and corrosion forms of 2024/Q235/304 tri-metallic couple with multivariable cathode/anode area ratios: Experiments and modeling

doi:10.1016/j.electacta.2020.136947

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	Variations of galvanic currents and corrosion forms of 2024/Q235/304 tri-metallic couple with multivariable cathode/anode area ratios: Experiments and modeling
	Shi, Linjun 1,2; Song, Yingwei 1; Zhao, Pingping 1,2; Wang, Haitao 1; Dong, Kaihui 1; Shan, Dayong 1; Han, En-Hou 1
刊名	ELECTROCHIMICA ACTA
	2020-11-01
卷号	359 页码:15
关键词	Tri-metallic galvanic corrosion Cathode/anode area ratio Intergranular corrosion Mathematical model FEM
ISSN号	0013-4686
DOI	10.1016/j.electacta.2020.136947
通讯作者	Song, Yingwei(ywsong@imr.ac.cn)
英文摘要	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.
资助项目	National Key Research and Development Program of China[2017YFB0702100]
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000575853200013
资助机构	National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140847]
专题	金属研究所_中国科学院金属研究所
通讯作者	Song, Yingwei
作者单位	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
推荐引用方式 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.