Effect of Sn addition on the mechanical properties and bio-corrosion behavior of cytocompatible Mg–4Zn based alloys

Weiyan Jiang; Jingfeng Wang; Weikang Zhao; Qingshan Liu; Dianming Jiang; Shengfeng Guo

Journal of Magnesium and Alloys (Mar 2019)

Effect of Sn addition on the mechanical properties and bio-corrosion behavior of cytocompatible Mg–4Zn based alloys

Weiyan Jiang,
Jingfeng Wang,
Weikang Zhao,
Qingshan Liu,
Dianming Jiang,
Shengfeng Guo

Affiliations

Weiyan Jiang: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Jingfeng Wang: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; Corresponding authors.
Weikang Zhao: Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
Qingshan Liu: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Dianming Jiang: Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
Shengfeng Guo: Faculty of Materials and Energy, Southwest University, Chongqing 400715, China; Corresponding authors.

Journal volume & issue: Vol. 7, no. 1
pp. 15 – 26

Abstract

Read online

The mechanical properties and bio-corrosion behaviors of as-extruded Mg–4Zn alloys after Sn addition were investigated, systematically. A small amount of Sn addition to Mg–4Zn alloy slightly improved the mechanical properties for solid solution strengthening, and significantly controlled the bio-corrosion rates. Sn participating in the outer layer film formation as SnO/SnO2 resisted the bio-corrosion proceeding. Especially, Mg–4Zn–1.5Sn alloy, with a weight loss rate of 0.45 mm/y and hydrogen evolution rate of 0.099 mL/cm2/day, showed cytotoxicity grade of 0 to MC3T3-E1 cells. The perfect alliance of cytocompatibility, suitable mechanical properties and low bio-corrosion rate demonstrates that this Mg–4Zn–1.5Sn alloy is a promising biodegradable magnesium alloy for orthopedic implants. Keywords: Magnesium alloy, Polarization, Immersion, Bio-corrosion behavior, Cytocompatibility

Published in Journal of Magnesium and Alloys

ISSN: 2213-9567 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.keaipublishing.com/en/journals/journal-of-magnesium-and-alloys/

About the journal