E3S Web Conf.
Volume 38, 20182018 4th International Conference on Energy Materials and Environment Engineering (ICEMEE 2018)
|Number of page(s)||3|
|Section||Material Science and Technology|
|Published online||04 June 2018|
Corrosion resistance of the microarc oxidation coatings prepared on magnesium alloy
School of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China
* Corresponding author: firstname.lastname@example.org
Ceramic coatings were prepared on the surface of AZ91D magnesium alloy by microarc oxidation technology. The effects of different voltages on morphology, phase composition and thickness of the coatings were characterized by SEM and XRD. The corrosion resistance of the coatings was measured by electrochemical workstation. Results indicated that the microarc oxidation coatings prepared in sodium silicate electrolyte exhibited porous surface and mainly comprised MgO, Mg2SiO4 and a small amount of MgAl2O4. The thickness of the oxide coatings increased rapidly with the increase of voltage. The coating prepared at 400V voltage had good electrochemical corrosion resistance in 3.5wt% NaCl solution.
© The Authors, published by EDP Sciences, 2018.
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