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Microstructure and Corrosion Resistance Studies of PEO Coated Mg Alloys with a HF and US Pretreatment
Wei, Fangfang; Zhang, Wei; Zhang, Tao; Wang, Fuhui; Zhang, W; Zhang, T (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, 62 Wencui Rd, Shenyang 110016, Peoples R China.
2017
发表期刊INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
ISSN1452-3981
卷号12期号:1页码:155-165
摘要The effect of hydrofluoric acid (HF) pretreatment on the microstructure and corrosion resistance of PEO coatings on AZ91 Mg alloys was investigated. The results showed that thin fluoride film was formed on AZ91 Mg alloy after pretreatment. The application of ultrasound (US) in the pretreatment made the film more compact and increased its F content. PEO coatings deposited on the pretreated AZ91 become denser with decreased porosity level and have no structural defects. The inner layer (IL) of PEO coating of HF-treated AZ91 with US is more intact and contains more F than those obtained without US. The better quality of IL could facilitate the stable discharge and form compact PEO coating. Therefore, PEO coating deposited on AZ91 pretreated with (HF+US) offered a better corrosion resistance, which is in good agreement with the results of electrochemical measurements.; The effect of hydrofluoric acid (HF) pretreatment on the microstructure and corrosion resistance of PEO coatings on AZ91 Mg alloys was investigated. The results showed that thin fluoride film was formed on AZ91 Mg alloy after pretreatment. The application of ultrasound (US) in the pretreatment made the film more compact and increased its F content. PEO coatings deposited on the pretreated AZ91 become denser with decreased porosity level and have no structural defects. The inner layer (IL) of PEO coating of HF-treated AZ91 with US is more intact and contains more F than those obtained without US. The better quality of IL could facilitate the stable discharge and form compact PEO coating. Therefore, PEO coating deposited on AZ91 pretreated with (HF+US) offered a better corrosion resistance, which is in good agreement with the results of electrochemical measurements.
部门归属[wei, fangfang] univ sci & technol china, sch mat sci & engn, hefei 230026, peoples r china ; [wei, fangfang ; zhang, wei ; zhang, tao ; wang, fuhui] chinese acad sci, inst met res, lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china
关键词Mg Alloys Plasma Electrolytic Oxidation Oxide Coatings Pretreatment Corrosion
学科领域Electrochemistry
资助者Key Project of Natural Science Foundation of China [51531007]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78361
专题中国科学院金属研究所
通讯作者Zhang, W; Zhang, T (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, 62 Wencui Rd, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Wei, Fangfang,Zhang, Wei,Zhang, Tao,et al. Microstructure and Corrosion Resistance Studies of PEO Coated Mg Alloys with a HF and US Pretreatment[J]. INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,2017,12(1):155-165.
APA Wei, Fangfang,Zhang, Wei,Zhang, Tao,Wang, Fuhui,Zhang, W,&Zhang, T .(2017).Microstructure and Corrosion Resistance Studies of PEO Coated Mg Alloys with a HF and US Pretreatment.INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,12(1),155-165.
MLA Wei, Fangfang,et al."Microstructure and Corrosion Resistance Studies of PEO Coated Mg Alloys with a HF and US Pretreatment".INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE 12.1(2017):155-165.
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