Analysis on the Anodizing Process of AZ31 Magnesium Alloy in an Environmental Friendly Alkaline Electrolyte

Zhong Ping Xiong; Yu Jun Si; Min Jiao Li

doi:10.4028/www.scientific.net/AMM.665.128

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 665Analysis on the Anodizing Process of AZ31...

Analysis on the Anodizing Process of AZ31 Magnesium Alloy in an Environmental Friendly Alkaline Electrolyte

Abstract:

AZ31 magnesium alloy was anodized in an environmental friendly electrolyte containing 50 g/l NaOH + 40 g/l Na₂B₄O₇·10H₂O + 60 g/l Na₂SiO₃·9H₂O. The voltage transient was recorded in anodizing process. The surface morphology of anodizing film was examined by SEM. The corrosion resistance of the anodizing film was characterized by electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The results show that the anodizing process can be divided to four stages according to the voltage transient. The anodizing film obtained at a current density of 20 mA·cm^-2 for 15 minutes has the optimum corrosion resistance.

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Applied Mechanics and Materials (Volume 665)

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128-131

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https://doi.org/10.4028/www.scientific.net/AMM.665.128

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Online since:

October 2014

Authors:

Zhong Ping Xiong, Yu Jun Si*, Min Jiao Li

Keywords:

Anodizing Process, AZ31 Magnesium, Corrosion Resistance, Four Stages

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