PROPERTIES OF ANODIC COATINGS ON AZ91D Mg ALLOYS DURING MICRO-ARC OXIDATION PROCESS

J Chin Soc Corr Pro

2005, Vol. 25

Issue (5): 267-270 DOI:

Research Report

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PROPERTIES OF ANODIC COATINGS ON AZ91D Mg ALLOYS DURING MICRO-ARC OXIDATION PROCESS

Yanhua Wang;Jia Wang;Jibiao Zhang

中科院海洋所

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Abstract With scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS) technique,properties of oxide coatings produced at different voltage on AZ91D Mg alloy substrates by micro-arc oxidation technique have been investigated.Three types of oxide coatings,passive film,micro-spark oxide coating and spark oxide coating were formed corresponding to different range of voltages.The results showed that micro-spark oxide coating exhibited the best performance of compact,homogeneous and with high resistance,comparing with other two types of oxide coatings,due to its high effective thickness.

Key words: micro-arc oxidation magnesium alloy properties resistance voltage

Received: 20 May 2004

ZTFLH:

TG146.2

Corresponding Authors: Yanhua Wang E-mail: wangyanhua@ms.qdio.ac.cn

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Yanhua Wang; Jia Wang; Jibiao Zhang. PROPERTIES OF ANODIC COATINGS ON AZ91D Mg ALLOYS DURING MICRO-ARC OXIDATION PROCESS. J Chin Soc Corr Pro, 2005, 25(5): 267-270 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2005/V25/I5/267

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