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Formation Mechanism and Corrosion Performance of Phosphate Conversion Coatings on AZ91 and Mg-Gd-Y-Zr Alloy
Lu, Xiaopeng1; Chen, Yuyang1,2; Zhang, Chunyan1,2; Zhang, Tao1,2,3; Yu, Baoxing3; Xu, Hongbo4; Wang, Fuhui1
Corresponding AuthorLu, Xiaopeng(luxiaopeng@mail.neu.edu.cn) ; Zhang, Tao(zhangtao@mail.neu.edu.cn)
2018
Source PublicationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN0013-4651
Volume165Issue:10Pages:C601-C607
AbstractThe microstructure, phase composition and corrosion resistance of phosphate conversion coating (PCC) on AZ91D and Mg-Gd-Y-Zr alloy were investigated to understand the coating formation mechanism. It was found that the Volta potential difference between the second phase and alpha-Mg provides the main driving force for deposition of MgHPO4 inner layer. Mg dissolution rate is accelerated in Mg-RE (where RE represents rare earth elements) alloy at the beginning of the treatment, leading to formation of a dense and protective conversion coating on Mg-RE compared to AZ91D Mg. Electrochemical noise signals and H-2 evolution rate (HER) obtained during coating formation process were used to investigate and predict the microstructure and corrosion performance of the conversion coatings. A dense and protective conversion layer is produced if the noise resistance is high and HER is relatively low in the final stage of coating growth. (C) 2018 The Electrochemical Society.
Funding OrganizationNational Natural Science Foundation of China ; Young Elite Scientists Sponsorship Program by China Association for Science and Technology ; National Program for Young Top-notch Professionals ; Fundamental Research Funds for the Central Universities
DOI10.1149/2.0221810jes
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51531007] ; National Natural Science Foundation of China[51771050] ; National Natural Science Foundation of China[U1737102] ; Young Elite Scientists Sponsorship Program by China Association for Science and Technology[2017QNRC001] ; National Program for Young Top-notch Professionals ; Fundamental Research Funds for the Central Universities[N170203006] ; Fundamental Research Funds for the Central Universities[N170205002]
WOS Research AreaElectrochemistry ; Materials Science
WOS SubjectElectrochemistry ; Materials Science, Coatings & Films
WOS IDWOS:000441061800062
PublisherELECTROCHEMICAL SOC INC
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128828
Collection中国科学院金属研究所
Corresponding AuthorLu, Xiaopeng; Zhang, Tao
Affiliation1.Northeastern Univ, Shenyang Natl Lab Mat Sci, Corros & Protect Div, Shenyang 110819, Liaoning, Peoples R China
2.Harbin Engn Univ, Corros & Protect Lab, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Heilongjiang, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Shenyang 110016, Liaoning, Peoples R China
4.Univ Sci & Technol, Coll Chem Engn, Anshan 114051, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Lu, Xiaopeng,Chen, Yuyang,Zhang, Chunyan,et al. Formation Mechanism and Corrosion Performance of Phosphate Conversion Coatings on AZ91 and Mg-Gd-Y-Zr Alloy[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2018,165(10):C601-C607.
APA Lu, Xiaopeng.,Chen, Yuyang.,Zhang, Chunyan.,Zhang, Tao.,Yu, Baoxing.,...&Wang, Fuhui.(2018).Formation Mechanism and Corrosion Performance of Phosphate Conversion Coatings on AZ91 and Mg-Gd-Y-Zr Alloy.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,165(10),C601-C607.
MLA Lu, Xiaopeng,et al."Formation Mechanism and Corrosion Performance of Phosphate Conversion Coatings on AZ91 and Mg-Gd-Y-Zr Alloy".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 165.10(2018):C601-C607.
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