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Chemically depleting the noble impurities from AZ91-T4 magnesium alloy: A new and efficient pretreatment method to improve the corrosion resistance of phosphate conversion coatings
Liao, Shangju1,2; Yu, Baoxing1; Zhang, Bo1; Zhou, Peng4; Zhang, Tao3; Wang, Fuhui3
Corresponding AuthorZhang, Tao(zhangtao@mail.neu.edu.cn)
2021-10-01
Source PublicationCORROSION SCIENCE
ISSN0010-938X
Volume191Pages:19
AbstractAlx(Mn,Fe)y phase, as a common derivative of Fe-containing impurities, significantly deteriorates the protectiveness of phosphate conversion coatings (PCC) on magnesium alloys due to the micro-galvanic effect. This work presents a novel pretreatment method, aiming at chemically depleting the noble Alx(Mn,Fe)y phase from Mg alloy surface before PCC treatment. The pretreatment bath contains both oxidant and complexing agent, with the pH value and concentration of different constituents being determined by thermodynamic calculation. The corrosion resistance of PCC being preceded by exploiting the novel pretreatment method was improved, which was attributed to the mitigation of micro-galvanic corrosion.
KeywordMagnesium alloys Corrosion resistance Conversion coatings Pretreatment
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation
DOI10.1016/j.corsci.2021.109725
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51771050] ; National Natural Science Foundation of China[51531007] ; China Postdoctoral Science Foundation[2019M651128]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000696876000003
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167010
Collection中国科学院金属研究所
Corresponding AuthorZhang, Tao
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Corros & Protect Div, 62 Wencui Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Northeastern Univ, Shenyang Natl Lab Mat Sci, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China
4.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
Recommended Citation
GB/T 7714
Liao, Shangju,Yu, Baoxing,Zhang, Bo,et al. Chemically depleting the noble impurities from AZ91-T4 magnesium alloy: A new and efficient pretreatment method to improve the corrosion resistance of phosphate conversion coatings[J]. CORROSION SCIENCE,2021,191:19.
APA Liao, Shangju,Yu, Baoxing,Zhang, Bo,Zhou, Peng,Zhang, Tao,&Wang, Fuhui.(2021).Chemically depleting the noble impurities from AZ91-T4 magnesium alloy: A new and efficient pretreatment method to improve the corrosion resistance of phosphate conversion coatings.CORROSION SCIENCE,191,19.
MLA Liao, Shangju,et al."Chemically depleting the noble impurities from AZ91-T4 magnesium alloy: A new and efficient pretreatment method to improve the corrosion resistance of phosphate conversion coatings".CORROSION SCIENCE 191(2021):19.
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