Investigation of ZrO2 nanoparticles concentration and processing time effect on the localized PEO coatings formed on AZ91 alloy

查看全文 作　　者：Zeeshan Ur [1]Rehman;Dongjin [1]Choi

机构地区：[1]School of Materials Science and Engineering,Hongik University,Sejong,Republic of Korea

出　　处：《Journal of Magnesium and Alloys》索引2019年第7卷第4期,共11页

基　　金：The current study was supported by“The Hongik University New Faculty Research Support Fund”Hongik University. 摘　　要：AZ91 Mg alloy was treated through a new localized PEO(Plasma Electrolytic Oxidation)coating approach,using electrolyte solutions with varying ZrO2 nanoparticles concentration(2-8 g/L)and processing times.With increase in the ZrO2 concentration,several microstructural changes were observed including;formation of cluster-type structure,damage to the inner layers(∼30 min)and sealing of defects.Corrosion analysis of the final coatings was carried out using potentiodynamic polarization,electrochemical impedance spectroscopy and post-corrosion analysis.It was explored that highest corrosion resistance(Rp∼81.17 kΩcm^2)of the coatings was obtained for ZrO2∼2 g/L.However,higher concentration of the ZrO2 nanoparticles caused weak crystalline coating structure,due to unstable and lower intensity discharges,thus failed to offer high corrosion resistance performance. 关键词：Magnesium alloy PEO coating ZRO2 Corrosion Nanoparticles addition

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Investigation of ZrO2 nanoparticles concentration and processing time effect on the localized PEO coatings formed on AZ91 alloy

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引证文献(10)

耦合文献(79)

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