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Influence of the lithium content on the negative difference effect of Mg-Li alloys
Li, C. Q.1; Xu, D. K.2; Zhang, Z. R.1; Han, E. H.2
Corresponding AuthorLi, C. Q.(cqli13s@alum.imr.ac.cn) ; Xu, D. K.(dkxu@imr.ac.in)
2020-11-15
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume57Pages:138-145
AbstractThe so-called 'negative difference effect' (NDE) was often defined by the increasing rate of hydrogen evolution from magnesium (Mg) surface under anodic polarization. In this work, a series of electrochemical tests and microstructure observations were performed to provide an evidence that the NDE of Mg-Li alloys can be retarded by increasing lithium content. Potentiostatic, galvanostatic and potentiodynamic polarization experiments using Mg-xLi (x = 4, 7.5 and 14 wt%) alloys electrodes indicated that Mg-4Li alloy maintained the enhancing NDE prior to anodic dissolution as that of conventional Mg alloys. However, the emergence of beta-Li phase weakened the NDE of duplex Mg-7.5Li alloy at a low anodic current density, but it was still enhanced apparently after a high applied anodic value (more than 2 mA/cm(2)). The surface observations, including the plane and cross-sectional morphologies, confirmed that the cracked surface film derived from the anodic dissolution resulted in the catalytic activity of NDE for Mg-4Li and Mg-7.5Li alloys. Furthermore, the NDE of Mg-14Li alloy was suppressed obviously after a prior applied anodic polarization, which was attributed to the persistent and integrated surface film which endured a higher level of applied anodic potential and current. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordMg-Li alloy Negative difference effect Electrochemical property Corrosion Anodic dissolution
Funding OrganizationNationalKey Research and Development Program of China ; National Natural Science Foundation of China Projects ; Doctor Startup Fund of Natural Science Foundation Program of Liaoning Province ; StrategicNew Industry Development Special Foundation of Shenzhen ; Funds of International Joint Laboratory for Light Alloys ; Liaoning BaiQianWan Talents Program ; Domain Foundation of Equipment Advance Research of 13thFiveyear Plan ; Innovation Fund of Instituteof Metal Research (IMR), Chinese Academy of Sciences (CAS) ; National Basic Research Program of China
DOI10.1016/j.jmst.2020.03.046
Indexed BySCI
Language英语
Funding ProjectNationalKey Research and Development Program of China[2017YFB0702001] ; NationalKey Research and Development Program of China[2016YFB0301105] ; National Natural Science Foundation of China Projects[51901047] ; National Natural Science Foundation of China Projects[51871211] ; National Natural Science Foundation of China Projects[51701129] ; Doctor Startup Fund of Natural Science Foundation Program of Liaoning Province[2019-BS-200] ; StrategicNew Industry Development Special Foundation of Shenzhen[JCYJ20170306141749970] ; Funds of International Joint Laboratory for Light Alloys ; Liaoning BaiQianWan Talents Program ; Domain Foundation of Equipment Advance Research of 13thFiveyear Plan[61409220118] ; Innovation Fund of Instituteof Metal Research (IMR), Chinese Academy of Sciences (CAS) ; National Basic Research Program of China[2013CB632205]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000572537200013
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140617
Collection中国科学院金属研究所
Corresponding AuthorLi, C. Q.; Xu, D. K.
Affiliation1.Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Li, C. Q.,Xu, D. K.,Zhang, Z. R.,et al. Influence of the lithium content on the negative difference effect of Mg-Li alloys[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,57:138-145.
APA Li, C. Q.,Xu, D. K.,Zhang, Z. R.,&Han, E. H..(2020).Influence of the lithium content on the negative difference effect of Mg-Li alloys.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,57,138-145.
MLA Li, C. Q.,et al."Influence of the lithium content on the negative difference effect of Mg-Li alloys".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 57(2020):138-145.
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