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Materials 2017, 10(8), 858; https://doi.org/10.3390/ma10080858

Decreasing Bio-Degradation Rate of the Hydrothermal-Synthesizing Coated Mg Alloy via Pre-Solid-Solution Treatment

1
College of Mechanics and Materials, Hohai University, Nanjing 210098, China
2
Suqian Research Institute of Hohai University, Suqian 223800, China
3
Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA
4
Department of Materials Science and Engineering, Kyushu University, Fukuoka 819-0395, Japan
*
Authors to whom correspondence should be addressed.
Received: 2 July 2017 / Revised: 22 July 2017 / Accepted: 24 July 2017 / Published: 27 July 2017
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Abstract

In this study, we report an effective approach, pre-solid solution (SS) treatment, to reduce the in-vitro bio-degradation rate of the hydrothermal-synthesizing coated Mg–2Zn–Mn–Ca–Ce alloy in Hanks’ solution. Pre-SS treatment alters the microstructure of alloys, which benefits the corrosion resistances of the substrate itself and the formed coating as well. The micro-galvanic corrosion between the secondary phase (cathode) and the α-Mg phase (anode) is relieved due to the reduction of the secondary phase. Meanwhile, coating formed on the SS-treated alloy was compacter than that on as-cast alloy, which provides better protection against initial corrosion. View Full-Text
Keywords: Mg alloy; conversion coating; solid solution treatment; microstructure; bio-degradation behavior Mg alloy; conversion coating; solid solution treatment; microstructure; bio-degradation behavior
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Song, D.; Li, C.; Zhang, L.; Ma, X.; Guo, G.; Zhang, F.; Jiang, J.; Ma, A. Decreasing Bio-Degradation Rate of the Hydrothermal-Synthesizing Coated Mg Alloy via Pre-Solid-Solution Treatment. Materials 2017, 10, 858.

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