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Interaction effect between different constituents in silicate-containing electrolyte on PEO coatings on Mg alloy
Chen, Yan1,2,3; Yang, Yange1; Zhang, Tao1; Zhang, Wei1; FuhuiWang1; Lu, Xiaopeng2; Blawert, Carsten2; Zheludkevich, Mikhail L.2
Corresponding AuthorZhang, Tao(zhangtao@hrbeu.edu.cn)
2016-12-15
Source PublicationSURFACE & COATINGS TECHNOLOGY
ISSN0257-8972
Volume307Pages:825-836
AbstractThe influence of different constituents in silicate containing alkaline electrolytes on PEO-coated AZ91D magnesium alloy has been systematically studied using response surface methodology (RSM) coupled with electrochemical measurements and microstructure characterization methods. The results indicate that the most dominant factor that determines the coating performance is the interaction between Na2SiO3 and NaOH, where better corrosion resistance could be achieved when their concentrations are tuned in different directions. Infrared spectrum analysis of the electrolytes innovatively indicates that the degree of polymerization of silicate ions (from one to two-and three-dimensional), varied by the concentration of Na2SiO3 and NaOH, influences the kinetic mechanism of coating formation and thermal-driven gel-forming process under sparking. When silicates species exist as a relatively higher polymerized state, which indicates lower mobility of silicates in the electrolyte and better affinity for trapping Al3+ to form gel-like networks, the resulting coating is inhomogeneous and susceptible to corrosive ions; otherwise, the coating is more homogeneous and exhibits improved corrosion resistance. The work herein aims to provide guidelines for designing PEO electrolyte via correlating the intrinsic nature of the electrolyte with coating properties. (C) 2016 Elsevier B.V. All rights reserved.
KeywordMagnesium Plasma electrolytic oxidation Response surface methodology IR spectroscopy
Funding Organizationprogram of Outstanding Young Scholars ; Program of Hundred Talents of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; German Academic Exchange Service
DOI10.1016/j.surfcoat.2016.09.031
Indexed BySCI
Language英语
Funding Projectprogram 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
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000390622200099
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/123479
Collection中国科学院金属研究所
Corresponding AuthorZhang, Tao
Affiliation1.Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Wencui RD 62, Shenyang 110016, Peoples R China
2.Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Plank Str 1, D-21502 Geesthacht, Germany
3.Univ Chinese Acad Sci, Yuquan RD 19, Beijing 110049, Peoples R China
Recommended Citation
GB/T 7714
Chen, Yan,Yang, Yange,Zhang, Tao,et al. Interaction effect between different constituents in silicate-containing electrolyte on PEO coatings on Mg alloy[J]. SURFACE & COATINGS TECHNOLOGY,2016,307:825-836.
APA Chen, Yan.,Yang, Yange.,Zhang, Tao.,Zhang, Wei.,FuhuiWang.,...&Zheludkevich, Mikhail L..(2016).Interaction effect between different constituents in silicate-containing electrolyte on PEO coatings on Mg alloy.SURFACE & COATINGS TECHNOLOGY,307,825-836.
MLA Chen, Yan,et al."Interaction effect between different constituents in silicate-containing electrolyte on PEO coatings on Mg alloy".SURFACE & COATINGS TECHNOLOGY 307(2016):825-836.
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