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Published September 2017 | Published
Journal Article Open

In Vitro Corrosion Properties of Mg Matrix In Situ Composites Fabricated by Spark Plasma Sintering

Abstract

Mg matrix in situ composites were fabricated from Mg and ZnO powder by a spark plasma sintering method. The composition and microstructure of the sintered samples were characterized. Corrosion properties of fabricated composites were evaluated by immersion and by electrochemical tests using Hanks' solution. The results showed that the formation of in situ products improved significantly the corrosion resistance of the fabricated composites compared with pure Mg; Mg-10 wt % ZnO composites especially exhibited the lowest corrosion rate. In addition, an energy-dispersive X-ray (EDX) analysis showed that calcium phosphate formed as a corrosion product on the surface of Mg-10 wt % ZnO composites, while Mg(OH)_2 appeared as a corrosion product on the surface of Mg-20 wt % ZnO composite. The findings suggested Mg-10 wt % ZnO composite as a potential candidate for temporary implant application.

Additional Information

© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Received: 8 August 2017; Accepted: 7 September 2017; Published: 9 September 2017. This work was financially supported by Light Metal Educational Foundation, Inc. Author Contributions: Nguyen Q. Cao (Nguyen Quang Cao) contributed to this work in experiment planning, experiment measurements, data analysis and manuscript preparation. Dinh N. Pham (Dinh Ngoc Pham) and Kai Narita contributed in sample preparation and manuscript preparation. Hai V. Dinh (Hai Van Dinh) contributed in experiment planning, result analysis and evaluation. Sachiko Hiromoto contributed in experiment measurements, data analysis and manuscript preparation. Equo Kobayashi contributed in experiment planning, experiment measurements, data analysis and manuscript preparation. The authors declare no conflict of interest. The founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.

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August 21, 2023
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