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Effect of applied potential on the microstructure, composition and corrosion resistance evolution of fluoride conversion film on AZ31 magnesium alloy
Wu, Liping; Wang, Changgang; Pokharel, Durga Bhakta; Etim, Ini-Ibehe Nabuk; Zhao, Lin; Dong, Junhua; Ke, Wei; Chen, Nan
Corresponding AuthorDong, Junhua(jhdong@imr.ac.cn)
2018-11-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume34Issue:11Pages:2084-2090
AbstractAZ31 magnesium (Mg) alloy was potentiostatic polarized in 0.1 M deaerated KF solution with pH 7.5 from -0.4 V to -1.4 V with an interval of -0.2 V. The polarization process was described by the potentiostatic current decay. The resultant film was analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). The results demonstrated that the deposited film included a Mg(OH)(2)/MgF2 containing inner layer and a Mg(OH)(2)/MgF2/KMgF3 comprising outer layer. The high polarized potential produced high content of MgF2 but low content of KMgF3 and thin film. Conversely, the low polarized potential produced small content of MgF2 but high content of KMgF3 and thick film. The optimal corrosion resistance of the deposited film was obtained at -1.4V, which was closely related with the content of MgF2 and KMgF3 and the film thickness. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordPotentiostatic Fluoride conversion film AZ31 magnesium alloy KF solution Corrosion
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.jmst.2018.04.009
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51701221]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000439396700012
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/135919
Collection中国科学院金属研究所
Corresponding AuthorDong, Junhua
AffiliationChinese Acad Sci, Inst Met Res, Environm Corros Ctr, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Wu, Liping,Wang, Changgang,Pokharel, Durga Bhakta,et al. Effect of applied potential on the microstructure, composition and corrosion resistance evolution of fluoride conversion film on AZ31 magnesium alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(11):2084-2090.
APA Wu, Liping.,Wang, Changgang.,Pokharel, Durga Bhakta.,Etim, Ini-Ibehe Nabuk.,Zhao, Lin.,...&Chen, Nan.(2018).Effect of applied potential on the microstructure, composition and corrosion resistance evolution of fluoride conversion film on AZ31 magnesium alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(11),2084-2090.
MLA Wu, Liping,et al."Effect of applied potential on the microstructure, composition and corrosion resistance evolution of fluoride conversion film on AZ31 magnesium alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.11(2018):2084-2090.
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