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The Special Role of Anodic Second Phases in the Micro-galvanic Corrosion of EW75 Mg Alloy
Liu, Jinhui; Song, Yingwei; Chen, Jiachen; Chen, Peng; Shan, Dayong; Han, En-Hou; ywsong@imr.ac.cn
2016
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume189Pages:190-195
AbstractIt is well known that second phases act as micro-cathodes in the corrosion of traditional Mg alloys. However, the effect of second phases on the corrosion behavior of Mg-rare earth (RE) alloys is ambiguous in view of the second phases consisting of Mg and more active RE elements. The role of second phases in the corrosion of cast EW75 (Mg-5Y-7Gd-1Nd-0.5Zr) was studied by scanning electron microscopy (SEM) observations, Scanning Kelvin Probe Force Microscopy (SKPFM) analysis, immersion and electrochemical tests. It is found that the second phases in EW75 are more active than Mg matrix and preferentially dissolved at the initial corrosion stage. It indicates that the second phases act as micro-anodes, which are greatly different from the role of second phases in traditional Mg alloys. (C) 2015 Elsevier Ltd. All rights reserved.
description.department[liu, jinhui] northeastern univ, shenyang 110004, peoples r china ; [liu, jinhui ; song, yingwei ; chen, peng ; shan, dayong ; han, en-hou] chinese acad sci, inst met res, natl engn ctr corros control, shenyang 110016, peoples r china ; [chen, jiachen] xi an jiao tong univ, sch chem engn & technol, xian 710049, peoples r china
KeywordSecond Phases Micro-galvanic Corrosion Mg-re Alloys Micro-anodes Skpfm
Funding OrganizationNational Key Basic Research Program of China [2013CB632205]; National Natural Science Foundation of China [51471174]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75208
Collection中国科学院金属研究所
Corresponding Authorywsong@imr.ac.cn
Recommended Citation
GB/T 7714
Liu, Jinhui,Song, Yingwei,Chen, Jiachen,et al. The Special Role of Anodic Second Phases in the Micro-galvanic Corrosion of EW75 Mg Alloy[J]. ELECTROCHIMICA ACTA,2016,189:190-195.
APA Liu, Jinhui.,Song, Yingwei.,Chen, Jiachen.,Chen, Peng.,Shan, Dayong.,...&ywsong@imr.ac.cn.(2016).The Special Role of Anodic Second Phases in the Micro-galvanic Corrosion of EW75 Mg Alloy.ELECTROCHIMICA ACTA,189,190-195.
MLA Liu, Jinhui,et al."The Special Role of Anodic Second Phases in the Micro-galvanic Corrosion of EW75 Mg Alloy".ELECTROCHIMICA ACTA 189(2016):190-195.
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