Understanding the galvanic corrosion of the Q-phase/Al couple using SVET and SIET

doi:10.1016/j.jmst.2019.03.001

IMR OpenIR

	Understanding the galvanic corrosion of the Q-phase/Al couple using SVET and SIET
	Ikeuba, Alexander I.1,2,3,4; Zhang, Bo 1,2,5; Wang, Jianqiu 2; Han, En-Hou 2; Ke, Wei 2
通讯作者	Zhang, Bo(bxz011@imr.ac.cn)
	2019-07-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	35 期号:7 页码:1444-1454
摘要	The galvanic corrosion of the Q-phase/Al couple in 0.1 M NaCl solutions has been studied using the scanning vibrating electrode technique (SVET), the scanning ion-selective electrode technique (SIET) and energy dispersive X-ray spectroscopy (EDX). The galvanic corrosion of the Q-phase/Al couple was found to be dependent on pH and immersion time. Current density maps obtained by SVET shows that the anodic oxidation processes emerge from Al in a localized manner in pH 2 and 6 solutions but is initiated in a uniform manner in pH 13 solution, whereas, the cathodic processes are more homogeneously distributed over the Q-phase at pH 2, 6 and 13. It is seen that the Q-phase remains cathodic in the Q-phase/Al couple in acidic, neutral and alkaline solutions indicating that the galvanic polarity of the Q-phase is independent of pH. The effect of the galvanic corrosion was largest at pH 2 and 13 compared to pH 6. The pH map obtained by SIET indicates that the galvanic activity of the Q-phase/Al couple proceeds via heavy alkalization of the Q-phase surface with the generation of appreciable amounts of OH-ions. The enrichment of Cu indicated by EDX is responsible for the observed cathodic activity of the Q-phase in the Q-phase/Al couple. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Q-phase Galvanic corrosion Scanning vibrating electrode technique (SVET) Scanning ion-selective electrode technique (SIET) Energy dispersive X-ray spectroscopy (EDX)
资助者	National Natural Science Foundation of China
DOI	10.1016/j.jmst.2019.03.001
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51571201]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000466369600028
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：45[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/321006/133300
专题	中国科学院金属研究所
通讯作者	Zhang, Bo
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.Univ Calabar, Dept Pure & Appl Chem, PMB 1115, Calabar, Nigeria 5.72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Ikeuba, Alexander I.,Zhang, Bo,Wang, Jianqiu,et al. Understanding the galvanic corrosion of the Q-phase/Al couple using SVET and SIET[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(7):1444-1454.
APA	Ikeuba, Alexander I.,Zhang, Bo,Wang, Jianqiu,Han, En-Hou,&Ke, Wei.(2019).Understanding the galvanic corrosion of the Q-phase/Al couple using SVET and SIET.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(7),1444-1454.
MLA	Ikeuba, Alexander I.,et al."Understanding the galvanic corrosion of the Q-phase/Al couple using SVET and SIET".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.7(2019):1444-1454.