IMR OpenIR
Influence of second phase on corrosion performance and formation mechanism of PEO coating on AZ91 Mg alloy
Chen, Yan; Yang, Yange; Zhang, Wei; Zhang, Tao; Wang, Fuhui; Zhang, W; Zhang, T (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Wencui RD 62, Shenyang 110016, Peoples R China.
2017-09-25
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号718页码:92-103
摘要Plasma electrolytic oxidation (PEO) treatment has been performed on AZ91 Mg alloy in a silicate-containing alkaline electrolyte to disclose the relationship between second phase and resultant coating. The morphology and corrosion behavior were characterized for PEO coatings on three different AZ91 substrates with microstructures altered by heat treatment. In the presence of beta phase, both the substrate and PEO coating exhibit enhanced corrosion resistance with finer and more evenly distributed b phase precipitates. In the as-cast AZ91, the anodized coating displays chemically and morphologically discontinuity on a and b phase with very coarse and defective regions on two-phase boundaries. In aged AZ91 with nano-sized b phase precipitates, the PEO coating shows no obvious difference on two-phase boundaries and is more homogenous with fewer pores and defects. The residual stress values given by Xray diffraction ( XRD) analysis indicate that PEO coating on aged AZ91 with finest b phase has the smallest stress which might be the reason for its improved corrosion resistance under synergetic effect of corrosive ions and residual stress. Conversely, in the absence of b phase, i.e. after solid solution treatment, the coating is characterized by the most inhomogeneous microstructure and the worst corrosion resistance, presumably owing to the absence of protective aluminum-containing oxides in the coating and more severe localized oxidation behavior adjacent to AlMn phase. Understanding the effect of second phase on PEO coating will enable us to optimize porous oxide structures for improved corrosion resistance by properly altering the substrate microstructure. (C) 2017 Published by Elsevier B.V.; Plasma electrolytic oxidation (PEO) treatment has been performed on AZ91 Mg alloy in a silicate-containing alkaline electrolyte to disclose the relationship between second phase and resultant coating. The morphology and corrosion behavior were characterized for PEO coatings on three different AZ91 substrates with microstructures altered by heat treatment. In the presence of beta phase, both the substrate and PEO coating exhibit enhanced corrosion resistance with finer and more evenly distributed b phase precipitates. In the as-cast AZ91, the anodized coating displays chemically and morphologically discontinuity on a and b phase with very coarse and defective regions on two-phase boundaries. In aged AZ91 with nano-sized b phase precipitates, the PEO coating shows no obvious difference on two-phase boundaries and is more homogenous with fewer pores and defects. The residual stress values given by Xray diffraction ( XRD) analysis indicate that PEO coating on aged AZ91 with finest b phase has the smallest stress which might be the reason for its improved corrosion resistance under synergetic effect of corrosive ions and residual stress. Conversely, in the absence of b phase, i.e. after solid solution treatment, the coating is characterized by the most inhomogeneous microstructure and the worst corrosion resistance, presumably owing to the absence of protective aluminum-containing oxides in the coating and more severe localized oxidation behavior adjacent to AlMn phase. Understanding the effect of second phase on PEO coating will enable us to optimize porous oxide structures for improved corrosion resistance by properly altering the substrate microstructure. (C) 2017 Published by Elsevier B.V.
部门归属[chen, yan ; yang, yange ; zhang, wei ; zhang, tao ; wang, fuhui] chinese acad sci, inst met res, lab corros & protect, wencui rd 62, shenyang 110016, peoples r china ; [chen, yan] univ chinese acad sci, yuquan rd 19, beijing 110049, peoples r china ; [zhang, tao ; wang, fuhui] northeastern univ, sch mat sci & engn, key lab anisotropy & texture mat moe, wenhua rd 3-11, shenyang 110819, peoples r china
关键词Magnesium Plasma Electrolytic Oxidation Second Phase
学科领域Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者Program of Outstanding Young Scholars; Program of Hundred Talents of Chinese Academy of Sciences; National Natural Science Foundation of China [51531007]; Chinese Academy of Sciences; German Academic Exchange Service
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78009
专题中国科学院金属研究所
通讯作者Zhang, W; Zhang, T (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Wencui RD 62, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Chen, Yan,Yang, Yange,Zhang, Wei,et al. Influence of second phase on corrosion performance and formation mechanism of PEO coating on AZ91 Mg alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,718:92-103.
APA Chen, Yan.,Yang, Yange.,Zhang, Wei.,Zhang, Tao.,Wang, Fuhui.,...&Zhang, T .(2017).Influence of second phase on corrosion performance and formation mechanism of PEO coating on AZ91 Mg alloy.JOURNAL OF ALLOYS AND COMPOUNDS,718,92-103.
MLA Chen, Yan,et al."Influence of second phase on corrosion performance and formation mechanism of PEO coating on AZ91 Mg alloy".JOURNAL OF ALLOYS AND COMPOUNDS 718(2017):92-103.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Chen, Yan]的文章
[Yang, Yange]的文章
[Zhang, Wei]的文章
百度学术
百度学术中相似的文章
[Chen, Yan]的文章
[Yang, Yange]的文章
[Zhang, Wei]的文章
必应学术
必应学术中相似的文章
[Chen, Yan]的文章
[Yang, Yange]的文章
[Zhang, Wei]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。