Advanced   Register
IMR OpenIR  > 中国科学院金属研究所  > 期刊论文

题名: Influence of second phase on corrosion performance and formation mechanism of PEO coating on AZ91 Mg alloy
作者: Chen, Yan;  Yang, Yange;  Zhang, Wei;  Zhang, Tao;  Wang, Fuhui
发表日期: 2017-9-25
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.
刊名: JOURNAL OF ALLOYS AND COMPOUNDS
Appears in Collections:中国科学院金属研究所_期刊论文

Files in This Item:

There are no files associated with this item.




Recommended Citation:
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.

SCI Citaion Data:
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Chen, Yan]'s Articles
 [Yang, Yange]'s Articles
 [Zhang, Wei]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Chen, Yan]‘s Articles
 [Yang, Yange]‘s Articles
 [Zhang, Wei]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

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

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院金属研究所  -Feedback
Powered by CSpace