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Formation Of Ha-Containing Coating On Az31 Magnesium Alloy By Micro-Arc Oxidation

Author

Listed:
  • HUI TANG

    (School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China)

  • DEYU LI

    (School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China)

  • XIUPING CHEN

    (School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China)

  • CHAO WU

    (School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China)

  • FUPING WANG

    (School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China)

Abstract

Magnesium and its alloys are potential biodegradable implant materials due to their attractive biological properties. But the use of magnesium is still hampered by its poor corrosion resistance in physiological fluids. In this study, a HA-containing coating was fabricated by micro-arc oxidation (MAO). The active plasma species of micro-discharge was studied by optical emission spectroscopy (OES). The microstructure and composition were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The corrosion behavior and apatite-forming ability were studied by electrochemical tests and immersed samples in simulated body fluids (SBF). The results show that the microdischarge channel model is gas discharges and oxide layer discharges. The elements from the substrate and electrolyte take part in the formation of the coating. The MAO coating significantly improves the corrosion resistance of AZ31 magnesium alloy and enhances the apatite formation ability.

Suggested Citation

  • Hui Tang & Deyu Li & Xiuping Chen & Chao Wu & Fuping Wang, 2013. "Formation Of Ha-Containing Coating On Az31 Magnesium Alloy By Micro-Arc Oxidation," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 20(03n04), pages 1-6.
    • Handle: RePEc:wsi:srlxxx:v:20:y:2013:i:03n04:n:s0218625x13500261
    DOI: 10.1142/S0218625X13500261
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