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

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 resi...

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Bibliographic Details
Published in:International journal of precision engineering and manufacturing 2014-08, Vol.15 (8), p.1625-1630
Main Authors: Li, Long-Hao, Narayanan, Tirunelveli Sankaranarayanan Nellaiappan Sankara, Kim, Yu Kyoung, Kong, Young-Min, Shin, Gwi-Su, Lyu, Sung-Ki, Park, Il Song, Lee, Min Ho
Format: Article
Language:English
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Summary: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, Mg 3 (PO 4 ) 2 and Mg 2 SiO 4 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.
ISSN:2234-7593
2005-4602
DOI:10.1007/s12541-014-0512-9