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Journal of Advanced Ceramics

, Volume 2, Issue 3, pp 227–234 | Cite as

Microstructure and corrosion resistance of ultrasonic micro-arc oxidation biocoatings on magnesium alloy

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Abstract

The ultrasonic micro-arc oxidation (UMAO) was used to fabricate ceramic coatings on magnesium alloy. UMAO coatings were produced at 60 W input ultrasonic. The effects of the ultrasound on the microstructure, phase composition, elemental distribution and corrosion resistance of the coatings were extensively investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectrometry (EDX) and electrochemical workstation. The results showed that ultrasound improved the homogeneous distribution of micro-porous structure. The coatings were mainly composed of MgO ceramic and small amount of calcium and phosphorus with porous structure. The Ca/P ratio of the coatings increased when 60 W ultrasonic was used. The corrosion potential in simulated body fluid (SBF) changed from −1.583 V of bare magnesium alloy to −0.353 V of magnesium alloy coated under 60 W ultrasonic. The corrosion resistance of UMAO coatings was better than that of MAO coatings.

Keywords

micro-arc oxidation (MAO) ultrasonic treatment magnesium alloy microstructure corrosion resistance 
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© The Author(s) 2013

This article is published under license to BioMed Central Ltd. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • Lijie Qu
    • 1
    • 2
  • Muqin Li
    • 1
    • 2
  • Miao Liu
    • 3
  • Erlin Zhang
    • 2
  • Chen Ma
    • 2
  1. 1.State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbinChina
  2. 2.Department of Materials Science and EngineeringJiamusi UniversityJiamusiChina
  3. 3.Department of StomatologyJiamusi UniversityJiamusiChina

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