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Article

Compositional Tailoring of Mg–2Zn–1Ca Alloy Using Manganese to Enhance Compression Response and In-Vitro Degradation

1
Faculty of Dentistry, National University Center for Oral Health Singapore (NUCOH), National University of Singapore, 9 Lower Kent Ridge Road, Singapore 119083, Singapore
2
Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
*
Authors to whom correspondence should be addressed.
The authors contributed equally to this work.
Academic Editor: Hendra Hermawan
Materials 2022, 15(3), 810; https://doi.org/10.3390/ma15030810
Received: 14 December 2021 / Revised: 17 January 2022 / Accepted: 20 January 2022 / Published: 21 January 2022
(This article belongs to the Special Issue Corrosion of Metals for Biomedical Applications)
The present study investigates Mg–2Zn–1Ca/XMn alloys as biodegradable implants for orthopedic fracture fixation applications. The effect of the presence and progressive addition of manganese (X = 0.3, 0.5, and 0.7 wt.%) on the degradation, and post-corrosion compressive response were investigated. Results suggest that the addition of manganese at 0.5 wt.% improved the corrosion resistance of Mg–2Zn–1Ca alloys. The pH values stabilized for the 0.5Mn-containing alloy and displayed a lower corrosion rate when compared to other Mg–2Zn–1Ca/Mn alloys. Mg–2Zn–1Ca showed a progressive reduction in the compressive strength properties at the end of day 21 whereas Mg–2Zn–1Ca/0.3Mn and Mg–2Zn–1Ca/0.5Mn samples showed a decrease until day 14 and stabilized around the same strength range after day 21. The ability of Mg–2Zn–1Ca/0.5Mn alloy to develop a network of protective hydroxide and phosphate layers has resulted in the corrosion control of the alloy. Mg–2Zn–1Ca/0.7Mn displays segregation of Mn particles at the grain boundaries resulting in decreased corrosion protection. The mechanism behind the corrosion protection of Mg–2Zn–1Ca alloys was discussed. View Full-Text
Keywords: magnesium alloy; manganese; biodegradable implants; corrosion; mechanical strength; hank’s balanced salt solution magnesium alloy; manganese; biodegradable implants; corrosion; mechanical strength; hank’s balanced salt solution
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MDPI and ACS Style

Prasadh, S.; Parande, G.; Gupta, M.; Wong, R. Compositional Tailoring of Mg–2Zn–1Ca Alloy Using Manganese to Enhance Compression Response and In-Vitro Degradation. Materials 2022, 15, 810. https://doi.org/10.3390/ma15030810

AMA Style

Prasadh S, Parande G, Gupta M, Wong R. Compositional Tailoring of Mg–2Zn–1Ca Alloy Using Manganese to Enhance Compression Response and In-Vitro Degradation. Materials. 2022; 15(3):810. https://doi.org/10.3390/ma15030810

Chicago/Turabian Style

Prasadh, Somasundaram, Gururaj Parande, Manoj Gupta, and Raymond Wong. 2022. "Compositional Tailoring of Mg–2Zn–1Ca Alloy Using Manganese to Enhance Compression Response and In-Vitro Degradation" Materials 15, no. 3: 810. https://doi.org/10.3390/ma15030810

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