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

doi:10.1016/j.corsci.2021.109725

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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, Shangju 1,2; Yu, Baoxing 1; Zhang, Bo 1; Zhou, Peng 4; Zhang, Tao 3; Wang, Fuhui 3
刊名	CORROSION SCIENCE
	2021-10-01
卷号	191 页码:19
关键词	Magnesium alloys Corrosion resistance Conversion coatings Pretreatment
ISSN号	0010-938X
DOI	10.1016/j.corsci.2021.109725
通讯作者	Zhang, Tao(zhangtao@mail.neu.edu.cn)
英文摘要	Alx(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.
资助项目	National Natural Science Foundation of China[51771050] ; National Natural Science Foundation of China[51531007] ; China Postdoctoral Science Foundation[2019M651128]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000696876000003
资助机构	National Natural Science Foundation of China ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/167009]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Tao
作者单位	1.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
推荐引用方式 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.