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Coloring and corrosion resistance of pure Mg modified by micro-arc oxidation method

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Abstract

Magnesium and its alloys are potential candidate materials for use as absorbable implants due to their excellent biodegradability and biocompatibility. Reducing their rapid corrosion rate by alloying and surface modification has been the focus of many research programs. To improve the corrosion resistance and to impart coloration, pure Mg is modified by micro-arc oxidation (MAO) using electrolytes containing different concentrations of manganese (Mn). A porous and thick MAO coating layer consisting of MgO, Mg3(PO4)2 and Mg2SiO4 phases is deposited on Mg. The color of the MAO treated Mg is changed from light gray to brown with the addition of 0.015 M Mn to the base electrolyte. The MAO coatings prepared in this study offers an improved corrosion resistance for Mg.

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Authors and Affiliations

  1. Department of Dental Biomaterials and Institute of Bio Degradable Material, Institute of Oral Bioscience, BK 21 Plus Project, School of Dentistry, Chonbuk National University, Jeonju, 561-756, South Korea

    Long-Hao Li, Tirunelveli Sankaranarayanan Nellaiappan Sankara Narayanan, Yu Kyoung Kim & Min Ho Lee

  2. School of Materials Science and Engineering, University of Ulsan, Ulsan, 680-749, South Korea

    Long-Hao Li & Young-Min Kong

  3. R&D Cluster Business Center Jeonbuk Technopark, Jeonju, 561-844, South Korea

    Gwi-Su Shin

  4. School of Mechanical Engineering, ReCAPT, Gyeongsang National University, Jinju, 660-701, South Korea

    Sung-Ki Lyu

  5. Division of Advanced Materials Engineering, Research Center for Advanced Materials Development and Institute of Biodegradable Materials, Chonbuk National University, Jeonju, 561-756, South Korea

    Il Song Park

Authors
  1. Long-Hao Li
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  2. Tirunelveli Sankaranarayanan Nellaiappan Sankara Narayanan
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  3. Yu Kyoung Kim
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  4. Young-Min Kong
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  5. Gwi-Su Shin
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  6. Sung-Ki Lyu
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  7. Il Song Park
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  8. Min Ho Lee
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Correspondence to Min Ho Lee.

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Li, LH., Narayanan, T.S.N.S., Kim, Y.K. et al. Coloring and corrosion resistance of pure Mg modified by micro-arc oxidation method. Int. J. Precis. Eng. Manuf. 15, 1625–1630 (2014). https://doi.org/10.1007/s12541-014-0512-9

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  • DOI: https://doi.org/10.1007/s12541-014-0512-9

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