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Characteristic and Corrosion Studies of Rare Earth (Ree) Based Anodizing on AZ91D Magnesium Alloy

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Abstract:

Oxide coatings on AZ91D magnesium alloy were prepared using anodizing technique with 10mA/cm2 current density for 5 minutes in electrolyte containing La (NO3) and Mg (NO3),with NaVO3 as an additive. The corrosion behaviors of different coatings condition were evaluated by immersion test in 5.0% NaCl electrolyte for 72 hours. The microstructures were analyzed by Optical Microscope (OM) and Scanning Electron Microscope (SEM). It was found that coatings with the addition of NaVO3 produced homogeneous primary α-matrix and bigger β-phase (Mg17Al12) compared to untreated AZ91D magnesium alloy. The oxide film formed by anodizing in electrolyte with NaVO3 enhances the corrosion resistance of the AZ91D magnesium alloy significantly

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Periodical:

Advanced Materials Research (Volume 879)

Pages:

38-42

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.879.38

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Online since:

January 2014

Authors:

Mat Akhir Khalid Azadi, M.Z.M. Zamzuri, Siti Norbahiyah Mohamad Badari, M.R.N. Liyana, M. Marina, K. Alir, Mohd Nazree B. Derman

Keywords:

Anodizing, AZ91D Magnesium Alloy, Lanthanum Nitrate (La (NO3)), Magnesium Nitrate (Mg (NO3)), Sodium Metavanadate (NaVO3)

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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