A new method to determine the synergistic effects of area ratio and microstructure on the galvanic corrosion of LAS A508/309 L/308 L SS dissimilar metals weld

doi:10.1016/j.jmst.2020.10.044

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	A new method to determine the synergistic effects of area ratio and microstructure on the galvanic corrosion of LAS A508/309 L/308 L SS dissimilar metals weld
	Okonkwo, Bright O.2,3; Ming, Hongliang 2; Wang, Jianqiu 2; Han, En-Hou 2; Rahimi, Ehsan 4,5; Davoodi, Ali 4,6; Hosseinpour, Saman 1
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2021-07-10
卷号	78 页码:38-50
关键词	Low alloy steel Stainless steel SEM AFM Galvanic corrosion Inclusion
ISSN号	1005-0302
DOI	10.1016/j.jmst.2020.10.044
通讯作者	Ming, Hongliang(hlming12s@imr.ac.cn) ; Wang, Jianqiu(wangjianqiu@imr.ac.cn)
英文摘要	The synergistic effects of area ratio and microstructure on the galvanic corrosion of A508/309 L/308 L dissimilar metals weld (DMW) are studied by a multi-analytical approach. It was demonstrated that decreasing the anode/cathode surface area ratio obviously enhances the corrosion rate of A508, both locally and globally. Deeper analyses of the AFM results enabled quantitative comparison of the corrosion behaviour of the different surface constituents. It was revealed that in the galvanic interaction of the DMW, the grain refined region corrodes most, followed by the partial grain refined region and base metal matrix of the A508, respectively. The electrochemical localization index (LI) estimation method and AFM analysis both confirmed the presence of a mixed (localized and uniform) corrosion phenomenon occurring on the surface of the A508 anode metal in the galvanic interaction of the dissimilar metals. Finally, the degree of synergism equation was utilized to describe the synergistic effects of anode/cathode area ratio and the microstructure of the samples on the galvanic corrosion of LAS A508/309L/308L SS DMW. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Natural Science Foundation of China[51771211] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC012] ; Key Program of the Chinese Academy of Sciences[ZDRW-CN-2017-1]
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:000652023600004
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Key Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/161309]
专题	金属研究所_中国科学院金属研究所
通讯作者	Ming, Hongliang; Wang, Jianqiu
作者单位	1.Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Particle Technol LFG, D-91058 Erlangen, Germany 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Ferdowsi Univ Mashhad, Fac Engn, Mat & Met Engn Dept, Mashhad 9177948974, Razavi Khorasan, Iran 5.Univ Udine, Polytech Dept Engn & Architecture, I-33100 Udine, Italy 6.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA
推荐引用方式 GB/T 7714	Okonkwo, Bright O.,Ming, Hongliang,Wang, Jianqiu,et al. A new method to determine the synergistic effects of area ratio and microstructure on the galvanic corrosion of LAS A508/309 L/308 L SS dissimilar metals weld[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,78:38-50.
APA	Okonkwo, Bright O..,Ming, Hongliang.,Wang, Jianqiu.,Han, En-Hou.,Rahimi, Ehsan.,...&Hosseinpour, Saman.(2021).A new method to determine the synergistic effects of area ratio and microstructure on the galvanic corrosion of LAS A508/309 L/308 L SS dissimilar metals weld.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,78,38-50.
MLA	Okonkwo, Bright O.,et al."A new method to determine the synergistic effects of area ratio and microstructure on the galvanic corrosion of LAS A508/309 L/308 L SS dissimilar metals weld".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 78(2021):38-50.