Understanding the electrochemical behavior of bulk-synthesized MgZn2 intermetallic compound in aqueous NaCl solutions as a function of pH

doi:10.1007/s10008-019-04210-y

IMR OpenIR

	Understanding the electrochemical behavior of bulk-synthesized MgZn2 intermetallic compound in aqueous NaCl solutions as a function of pH
	Ikeuba, Alexander I.1,2,3,4; Kou, Fujun 5; Duan, Haowei 5; Zhang, Bo 1,2; Wang, Jianqiu 2; Han, En-Hou 2; Ke, Wei 2
通讯作者	Zhang, Bo(bxz011@imr.ac.cn)
	2019-04-01
发表期刊	JOURNAL OF SOLID STATE ELECTROCHEMISTRY
ISSN	1432-8488
卷号	23 期号:4 页码:1165-1177
摘要	The electrochemical behavior of a bulk-synthesized MgZn2 intermetallic compound in aerated 0.1M NaCl solutions has been studied as a function of pH and applied potential using polarization techniques, electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), and focused ion beam-transmission electron microscopy (FIB-TEM). The anodic activity of MgZn2 is seen to decrease with an increase in pH value. Polarization tests reveal two limiting current densities in pH4 solution at relatively high and low potentials. At pH12, passivity is observed with a lower limiting current density compared to those observed at pH4. The corrosion film formed after potentiostatic polarization in the pH4 solution is composed of a bilayer at a less negative potential and a single layer at a more negative potential. In the case of pH12 solution, a protective compact bilayer film is formed irrespective of the potential within the passive zone. Overall, the corrosion mechanism of MgZn2 is by early dissolution of Mg leading to a Zn-enriched surface whose subsequent dissolution depends on the value of the applied potential.
关键词	MgZn2 Intermetallic compound Corrosion EIS XPS FIB-TEM
资助者	National Natural Science Foundation of China
DOI	10.1007/s10008-019-04210-y
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	Electrochemistry
WOS类目	Electrochemistry
WOS记录号	WOS:000463866900011
出版者	SPRINGER
引用统计	被引频次：24[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/321006/132943
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, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China 3.UCAS, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.Univ Calabar, Dept Pure & Appl Chem, PMB 1115, Calabar, Nigeria 5.CRRC Qingdao Sifang CO LTD, Qingdao 266111, Peoples R China
推荐引用方式 GB/T 7714	Ikeuba, Alexander I.,Kou, Fujun,Duan, Haowei,et al. Understanding the electrochemical behavior of bulk-synthesized MgZn2 intermetallic compound in aqueous NaCl solutions as a function of pH[J]. JOURNAL OF SOLID STATE ELECTROCHEMISTRY,2019,23(4):1165-1177.
APA	Ikeuba, Alexander I..,Kou, Fujun.,Duan, Haowei.,Zhang, Bo.,Wang, Jianqiu.,...&Ke, Wei.(2019).Understanding the electrochemical behavior of bulk-synthesized MgZn2 intermetallic compound in aqueous NaCl solutions as a function of pH.JOURNAL OF SOLID STATE ELECTROCHEMISTRY,23(4),1165-1177.
MLA	Ikeuba, Alexander I.,et al."Understanding the electrochemical behavior of bulk-synthesized MgZn2 intermetallic compound in aqueous NaCl solutions as a function of pH".JOURNAL OF SOLID STATE ELECTROCHEMISTRY 23.4(2019):1165-1177.