Abstract
Microarc oxidation (MAO) coating was prepared on the surface of AZ91D magnesium alloy in Na2SiO4-NaOH-C3H8O3 based electrolyte. The morphology and composition of the coating with different electrolyte constituent were analyzed by SEM and XRD. The result showed that the MAO coating was composed of loose layer and dense layer. The coating mainly comprised MgO, Mg2SiO4 and MgAl2O4. When the Na2SiO3 concentration was 20g/L, the pores of the coating were very uniform and the coating surface was smooth with homogeneous pore. The coating with addition of NaF to the electrolyte had the maximum thickness of 17~25μm.
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Schedule a callMore From: IOP Conference Series: Earth and Environmental Science
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