IMR OpenIR
Effect of variations of Al content on microstructure and corrosion resistance of PEO coatings on Mg-Al alloys
Wei, Fangfang; Zhang, Wei; Zhang, Tao; Wang, Fuhui; Zhang, W; Zhang, T (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, 62 Wencui Rd, Shenyang 110016, Peoples R China.
2017-01-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume690Pages:195-205
AbstractThe corrosion behavior of PEO coatings of four Mg-Al alloys was investigated with the emphasis on the effect of Al contents in the substrates. Results indicate that the volume fraction of beta phase (Mg17Al12) and interfaces of beta/eutectic phase (alpha+beta) increased with the increasing Al content, which have strong influences on the microstructure, the components and the porosity level of PEO coatings. PEO coatings were composed of two layers: an inner layer (IL) and an outer layer (OL). The differences in components of the IL can be ascribed to the enrichment of Al in beta phase and eutectic phase (alpha+beta) compared to alpha phase, which facilitate to form MgAl2O4. The increased defects of the IL caused by the increasing interfaces could be related to the high misfit degree and difference of Fermi energy (E-f) of components of IL. The porosity level of the PEO coatings first decreases and then increases with the increasing Al content caused by different discharging behaviors. It is found that the corrosion resistance first increases and later decreases, and resulted from microstructures of PEO coatings on different Mg-Al alloys. (C) 2016 Elsevier B.V. All rights reserved.; The corrosion behavior of PEO coatings of four Mg-Al alloys was investigated with the emphasis on the effect of Al contents in the substrates. Results indicate that the volume fraction of beta phase (Mg17Al12) and interfaces of beta/eutectic phase (alpha+beta) increased with the increasing Al content, which have strong influences on the microstructure, the components and the porosity level of PEO coatings. PEO coatings were composed of two layers: an inner layer (IL) and an outer layer (OL). The differences in components of the IL can be ascribed to the enrichment of Al in beta phase and eutectic phase (alpha+beta) compared to alpha phase, which facilitate to form MgAl2O4. The increased defects of the IL caused by the increasing interfaces could be related to the high misfit degree and difference of Fermi energy (E-f) of components of IL. The porosity level of the PEO coatings first decreases and then increases with the increasing Al content caused by different discharging behaviors. It is found that the corrosion resistance first increases and later decreases, and resulted from microstructures of PEO coatings on different Mg-Al alloys. (C) 2016 Elsevier B.V. All rights reserved.
description.department[wei, fangfang] univ sci & technol china, sch mat sci & engn, hefei 230026, peoples r china ; [wei, fangfang ; zhang, wei ; zhang, tao ; wang, fuhui] chinese acad sci, inst met res, lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china
KeywordMagnesium Alloys Tem Plasma Electrolytic Oxidation Oxide Coatings
Subject AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationHundred Talents Program of Chinese Academy of Sciences; National Natural Science Foundation of China [5153000271, 51001107]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78351
Collection中国科学院金属研究所
Corresponding AuthorZhang, W; Zhang, T (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, 62 Wencui Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Wei, Fangfang,Zhang, Wei,Zhang, Tao,et al. Effect of variations of Al content on microstructure and corrosion resistance of PEO coatings on Mg-Al alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,690:195-205.
APA Wei, Fangfang,Zhang, Wei,Zhang, Tao,Wang, Fuhui,Zhang, W,&Zhang, T .(2017).Effect of variations of Al content on microstructure and corrosion resistance of PEO coatings on Mg-Al alloys.JOURNAL OF ALLOYS AND COMPOUNDS,690,195-205.
MLA Wei, Fangfang,et al."Effect of variations of Al content on microstructure and corrosion resistance of PEO coatings on Mg-Al alloys".JOURNAL OF ALLOYS AND COMPOUNDS 690(2017):195-205.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wei, Fangfang]'s Articles
[Zhang, Wei]'s Articles
[Zhang, Tao]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wei, Fangfang]'s Articles
[Zhang, Wei]'s Articles
[Zhang, Tao]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wei, Fangfang]'s Articles
[Zhang, Wei]'s Articles
[Zhang, Tao]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.