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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, Linjun1,2; Song, Yingwei1; Zhao, Pingping1,2; Wang, Haitao1; Dong, Kaihui1; Shan, Dayong1; Han, En-Hou1
Corresponding AuthorSong, Yingwei(ywsong@imr.ac.cn)
2020-11-01
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume359Pages:15
AbstractTri-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.
KeywordTri-metallic galvanic corrosion Cathode/anode area ratio Intergranular corrosion Mathematical model FEM
Funding OrganizationNational Key Research and Development Program of China
DOI10.1016/j.electacta.2020.136947
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFB0702100]
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000575853200013
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140848
Collection中国科学院金属研究所
Corresponding AuthorSong, Yingwei
Affiliation1.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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