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Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel
Shi, Linjun1,2; Yang, Xiuying3; Song, Yingwei1; Liu, Dan1,2; Dong, Kaihui1; Shan, Dayong1; Han, En-Hou1
刊名JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
2019-09-01
卷号35期号:9页码:1886-1893
关键词Galvanic corrosion Tri-metallic couples Corrosive media Scanning vibrating electrode technique Zero resistance ammeter
ISSN号1005-0302
DOI10.1016/j.jmst.2019.04.022
通讯作者Song, Yingwei(ywsong@imr.ac.cn)
英文摘要Galvanic corrosion of tri-metallic couples is more complicated than that of bi-metallic couples. In this study, the effect of the pH of corrosive media on the galvanic corrosion of 2024 Al alloy/Q235 mild steel/304 stainless steel tri-metallic couples was investigated using potentiodynamic polarization, scanning electron microscopy, scanning vibrating electrode technique and a multi-channel galvanic corrosion meter. The results show that 2024 always acts as the only anode in 3.5 wt% NaCl at pH 5.56, 9.72 and 12.0, while both Q235 and 2024 act as anodes at pH 2.39 in the initial stage and then the role of Q235 changes at longer coupling time, which can be attributed to the effect of pH on the surface film of 2024. It is also found that the galvanic current density of a hri-metallic couple is the superposition of two bi-metallic couples when cathodic reactions are controlled by the diffusion of oxygen, otherwise it is smaller than that of the sum of two bi-metallic couples. The localized corrosion instead of uniform corrosion of anodic metal is accelerated by galvanic corrosion. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目National Key Research and Development Program of China[2017YFB0702100] ; Natural Science Foundation of Liaoning Province[20170540666]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
出版者JOURNAL MATER SCI TECHNOL
WOS记录号WOS:000475870600010
资助机构National Key Research and Development Program of China ; Natural Science Foundation of Liaoning Province
内容类型期刊论文
源URL[http://ir.imr.ac.cn/handle/321006/134530]  
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, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
3.Shenyang Inst Technol, Fushun 113122, Peoples R China
推荐引用方式
GB/T 7714
Shi, Linjun,Yang, Xiuying,Song, Yingwei,et al. Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(9):1886-1893.
APA Shi, Linjun.,Yang, Xiuying.,Song, Yingwei.,Liu, Dan.,Dong, Kaihui.,...&Han, En-Hou.(2019).Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(9),1886-1893.
MLA Shi, Linjun,et al."Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.9(2019):1886-1893.
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