| ZHAO Qing,ZHANG Zhi-you,CHEN Ning.Effect of Final Voltage on Corrosion Resistance of MB8 Mg Alloys by Micro-arc Oxidation[J],36(4):4-6 |
| Effect of Final Voltage on Corrosion Resistance of MB8 Mg Alloys by Micro-arc Oxidation |
| Received:March 15, 2007 Revised:August 10, 2007 |
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| DOI： |
| KeyWord:Micro-arc oxidation Magnesium alloy Corrosion resistance Final voltage |
| Author | Institution |
| ZHAO Qing |
Nanchang Institute of Aeronautical Technology, Nanchang , China |
| ZHANG Zhi-you |
Nanchang Institute of Aeronautical Technology, Nanchang , China |
| CHEN Ning |
Nanchang Institute of Aeronautical Technology, Nanchang , China |
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| Abstract: |
| With scanning electron microscopy ( SEM) , X-ray Diffraction ( XRD) , potentiodynamism polarization curves, electronmicroscopy impeclance spectroscopy ( EIS) , corrosion resistance of membrane produced at different final voltage on MB8 magnesium alloy substrates by micro-arc oxidation ( MAO) technique had been investigated. The results show: the higher the final voltage, the thicker the membrane; micro sparking oxide coating exhibites better performance of compact, homogeneous and high resistance comparing with arc-oxide coatings in which pore diameter augment and micro-defect multiply of ceramic coatings. Thereby comes to the conclusion that the membrane level erosion codetermines with membrane thickness and final voltage , the erosion of membrane at micro spark discharge last stage excels than arc discharge membrane. |
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