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New design principles for the bath towards chromate- and crack-free conversion coatings on magnesium alloys
Liao, Shangju1,2,3; Yu, Baoxing1; Zhang, Xuliang4; Lu, Xiaopeng3; Zhou, Peng3; Zhang, Chunyan1; Chen, XiaoBo5; Zhang, Tao3; Wang, Fuhui3
Corresponding AuthorZhou, Peng(zhoupeng@mail.neu.edu.cn) ; Zhang, Tao(zhangtao@mail.neu.edu.cn)
2021-03-15
Source PublicationJOURNAL OF MAGNESIUM AND ALLOYS
ISSN2213-9567
Volume9Issue:2Pages:505-519
AbstractCracking and low thickness are major obstacles to the high corrosion performance of conversion coating on magnesium alloy. In this work, the ratio of total acidity to pH (TA/pH) was applied as an indicator, and new principles regarding the design of conversion bath were proposed. The treatment bath should be composed of species that can be categorized into two groups: the first group of species that react with Mg substrate to increase the local pH at the interface; the second group that precipitate and contributes to the growth of coating. The species belong to second group exists in a supersaturated state and its precipitation process is almost independent on the reactions of the species in first group. By this way, a thick and crack-free two-layered conversion coating is obtained. Moreover, the nature of the adjustment of TA/pH and the roles of the oxidizing agent and catalyst were discussed. (C) 2020 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.
KeywordPhosphate conversion coating Design principles Magnesium alloy TA/pH Corrosion resistance
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation ; National Program for Young Top-notch Professionals ; Fundamental Research Funds for the Central Universities
DOI10.1016/j.jma.2019.12.013
Indexed BySCI
Languageen
Funding ProjectNational Natural Science Foundation of China[51531007] ; National Natural Science Foundation of China[51771050] ; China Postdoctoral Science Foundation[2019M651128] ; National Program for Young Top-notch Professionals ; Fundamental Research Funds for the Central Universities[N170205002]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000640516900011
PublisherKEAI PUBLISHING LTD
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161723
Collection中国科学院金属研究所
Corresponding AuthorZhou, Peng; Zhang, Tao
Affiliation1.Chinese Acad Sci, Inst Met Res, Corros & Protect Div, Shenyang Natl Lab Mat Sci, 62 Wencui Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
3.Northeastern Univ, Shenyang Natl Lab Mat Sci, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China
4.Shanghai Spaceflight Precis Machinery Res Inst, 76 Guide Rd, Shanghai 201600, Peoples R China
5.RMIT Univ, Sch Engn, Carlton, Vic 3053, Australia
Recommended Citation
GB/T 7714
Liao, Shangju,Yu, Baoxing,Zhang, Xuliang,et al. New design principles for the bath towards chromate- and crack-free conversion coatings on magnesium alloys[J]. JOURNAL OF MAGNESIUM AND ALLOYS,2021,9(2):505-519.
APA Liao, Shangju.,Yu, Baoxing.,Zhang, Xuliang.,Lu, Xiaopeng.,Zhou, Peng.,...&Wang, Fuhui.(2021).New design principles for the bath towards chromate- and crack-free conversion coatings on magnesium alloys.JOURNAL OF MAGNESIUM AND ALLOYS,9(2),505-519.
MLA Liao, Shangju,et al."New design principles for the bath towards chromate- and crack-free conversion coatings on magnesium alloys".JOURNAL OF MAGNESIUM AND ALLOYS 9.2(2021):505-519.
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