The Research on Anticorrosion and Abrasion Behavior in Corrosive Medium of Micro-Arc Oxidation Film on Magnesium Alloy

Abstract:

In the sodium silicate electrolyte system, the uniform ceramic films formed on AZ91D magnesium alloys were obtained by the pulse power when the current density is 40mA/cm². The morphology, phase composition, anticorrosion and abrasion resistance behaviors in corrosive medium were studied scanning electron microscopy (SEM). The results show that Micro-arc oxidation film is of double-layer structure (loose layer and compact layer), uniform surface and local cracks. Micro-arc oxidation treatment enhanced the anticorrosion of magnesium alloy. The corrosion potential of micro-arc oxidation film is more increased by 94mV than that of the magnesium alloy substrate. The abrasion of the film will be reduced in corroding medium.

• Periodical: Key Engineering Materials (Volumes 474-476)
• Pages: 123-126
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.474-476.123
• Online since: April 2011
• Authors: Bai Yang Lou, Yi Xiang Tang, Xiao Li
• Keywords: Abrasion Resistance, Anticorrosion, Magnesium Alloy, Micro-Arc Oxidation (MAO)

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