| 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 Author | Zhang, Tao(zhangtao@mail.neu.edu.cn) |
| 2021-10-01 | |
| Source Publication | CORROSION SCIENCE
 |
| ISSN | 0010-938X |
| Volume | 191Pages:19 |
| Abstract | 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. |
| Keyword | Magnesium alloys Corrosion resistance Conversion coatings Pretreatment |
| Funding Organization | National Natural Science Foundation of China ; China Postdoctoral Science Foundation |
| DOI | 10.1016/j.corsci.2021.109725 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51771050] ; National Natural Science Foundation of China[51531007] ; China Postdoctoral Science Foundation[2019M651128] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000696876000003 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/167008 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, Tao |
| Affiliation | 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 |
| 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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