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Effect of 2 wt% Ag Addition on Corrosion Properties of ZK40 for Biodegradable Applications

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Magnesium Technology 2020

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

The antibacterial effects of silver make it an attractive alloying element for biodegradable Mg alloys to treat possible inflammation and infections caused by the degrading orthopedic implants. In this study, as-extruded Mg–4%Zn–0.5%Zr (ZK40) alloy was alloyed with Ag, specifically 2 wt%, and subjected to a heat treatment at 350 ℃ for 7 days. The mechanical and corrosion responses were studied in two orthogonal planes (transverse and extrusion) before and after silver addition to explore its potential for biodegradable orthopedic applications. Corrosion characteristics were assessed at 37 ℃ in Hank’s solution for 24 h via electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PD) and open circuit potential (OCP). As-extruded and heat-treated ZK40 alloy displayed an inhomogeneous microstructure containing large, coarse grains, Zn–Zr rich secondary phase and some fine grain regions. While in ZK40–Ag, both planes showed a relatively more homogenous microstructure but with some agglomeration of Zn–Ag rich secondary phases. Here, we present our initial results on the different corrosion behaviors observed in the two materials.

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Acknowledgements

This research was performed with support from the Qatar Foundation under the National Priorities Research Program grant# NPRP 8-856-2-364. The authors acknowledge this financial support with gratitude.

Author information

Authors and Affiliations

  1. Mechanical Engineering Program, Texas A&M University at Qatar, Doha, Qatar

    M. AbdelGawad & B. Mansoor

  2. Mechanical Engineering Department, Texas A&M University at Qatar, College Station, TX, USA

    M. AbdelGawad, B. Mansoor & I. Karaman

  3. Materials Science and Engineering Program, Texas A&M University at Qatar, College Station, TX, USA

    B. Mansoor, M. W. Vaughan & I. Karaman

Authors
  1. M. AbdelGawad
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  2. B. Mansoor
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  3. M. W. Vaughan
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  4. I. Karaman
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Corresponding author

Correspondence to B. Mansoor .

Editor information

Editors and Affiliations

  1. Tuscaloosa, AL, USA

    J. Brian Jordon

  2. University of Florida, Gainesville, FL, USA

    Victoria Miller

  3. Pacific Northwest National Laboratory, Richland, WA, USA

    Vineet V. Joshi

  4. IND LLC, South Jordan, UT, USA

    Neale R. Neelameggham

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AbdelGawad, M., Mansoor, B., Vaughan, M.W., Karaman, I. (2020). Effect of 2 wt% Ag Addition on Corrosion Properties of ZK40 for Biodegradable Applications. In: Jordon, J., Miller, V., Joshi, V., Neelameggham, N. (eds) Magnesium Technology 2020. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36647-6_38

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