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Open AccessArticle

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.
Materials 2017, 10(8), 858; https://doi.org/10.3390/ma10080858
Received: 2 July 2017 / Revised: 22 July 2017 / Accepted: 24 July 2017 / Published: 27 July 2017
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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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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