Influences of the Current Density on Surface Morphology and Adhesion of Anodic Films of AZ91D Magnesium Alloy

Chin J Mater Res

2010, Vol. 24

Issue (3): 305-310 DOI:

论文

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Influences of the Current Density on Surface Morphology and Adhesion of Anodic Films of AZ91D Magnesium Alloy

JIANG Kuisheng, TANG Yuming, ZHAO Xuhui, ZUO Yu

College of Materials Science $\&$ Engineering, Beijing University of Chemistry $\&$ Technology, Beijing 100029

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JIANG Kuisheng TANG Yuming ZHAO Xuhui ZUO Yu. Influences of the Current Density on Surface Morphology and Adhesion of Anodic Films of AZ91D Magnesium Alloy. Chin J Mater Res, 2010, 24(3): 305-310.

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Abstract

Porous anodic films on AZ91D magnesium alloy were prepared at constant current densities. Effects of the current density on anodizing process were studied according to voltage-time response. The morphologies and adhesive properties of the anodic films were studied. The results showed that the current density had no effect on the value of breakdown voltage and critical voltage, but the anodizing time to reach breakdown voltage and critical voltage decreased as the current density increased. The porosity and the adhesive bonding strength of the anodic films increased first and then decreased as the current density increased. The films formed at the current density of 10 mA/cm2 and exhibited the highest adhesive bonding strength, approaching to 22.40 MPa.

Key words: metallic materials magnesium alloy anodizing current density, morphology adhesion

Received: 22 October 2009

ZTFLH:

TG146

Fund:

Supported by the Key Project of Science and Technology, Ministry of Education, No.108129.

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https://www.cjmr.org/EN/ OR https://www.cjmr.org/EN/Y2010/V24/I3/305

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