Long-term in vitro corrosion behavior of Zn-3Ag and Zn-3Ag-0.5Mg alloys considered for biodegradable implant applications

被引：43

作者：

Watroba, Maria ^{[1
]}

Mech, Krzysztof ^{[2
]}

Bednarczyk, Wiktor ^{[1
,3
]}

Kawalko, Jakub ^{[2
]}

Marciszko-Wiackowska, Marianna ^{[2
]}

Marzec, Mateusz ^{[2
]}

Shepherd, Duncan E. T. ^{[4
]}

Bala, Piotr ^{[1
,2
]}

机构：

[1] AGH Univ Sci & Technol, Fac Met Engn & Ind Comp Sci, Al A Mickiewicza 30, PL-30059 Krakow, Poland

[2] AGH Univ Sci & Technol, Acad Ctr Mat & Nanotechnol, Al A Mickiewicza 30, PL-30059 Krakow, Poland

[3] Warsaw Univ Technol, Fac Mat Sci & Engn, Woloska 141, PL-02507 Warsaw, Poland

[4] Univ Birmingham, Dept Mech Engn, Birmingham B15 2TT, W Midlands, England

来源：

MATERIALS & DESIGN | 2022年 / 213卷

关键词：

Zn alloys; Microstructure; Mechanical properties; Biodegradation; Galvanic corrosion; Electrochemical measurements; ZN-BASED ALLOYS; MECHANICAL-PROPERTIES; DEGRADATION BEHAVIOR; CARDIOVASCULAR STENTS; HIGH-STRENGTH; ZINC-ALLOYS; PURE ZINC; MG ALLOY; DEFORMATION; FRACTURE;

D O I：

10.1016/j.matdes.2021.110289

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, Zn-3Ag and Zn-3Ag-0.5Mg alloys were studied in terms of applicability as biodegradable implant materials. The performed tensile, compression and bending tests indicate a high strengthening effect induced by the Ag and Mg additions, additionally resulting in grain size refinement. It was shown that sustaining plastic strain during deformation depends on the applied stress causing asymmetric mechanical behavior of the tested Zn-based materials. Electrochemical measurements and immersion tests in Hanks' solution lasting up to 180 days revealed that Ag and Mg contribute to the change of the Zn matrix's open circuit potential and the formation of micro-galvanic cells between the Zn grains and precipitates. The fine-grained microstructure and evenly distributed small precipitates led to uniform corrosion occurring via pit formation on the corroded surface due to intergranular and micro galvanic corrosion mechanisms. The corrosion rate of the Zn-3Ag-0.5Mg alloy after 180 days was almost twice that of pure Zn and the Zn-3Ag alloy. (c) 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).

引用

页数：18

共 87 条

[1] The effects of alloying with Cu and Mn and thermal treatments on the mechanical instability of Zn-0.05Mg alloy [J].