Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 66, Issue -, Pages 128-138Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2020.07.006
Keywords
Mg-Zn-Zr-Nd alloy; Mechanical property; Corrosion; EIS; EFM
Funding
- National Key Research and Development Program of China [2016YFB0700300]
- China Scholarship Council (CSC) [201906460053]
- Fundacao para a Ciencia e Tecnologia [UIDB/00100/2020]
Ask authors/readers for more resources
An Mg-2Zn-0.6Zr-0.6Nd alloy with excellent mechanical properties for biodegradable cardiovascular stent applications was prepared through indirect extrusion. The corrosion behavior of the alloy in different biomimetic fluids was investigated, showing significant differences in corrosion rate trends and corrosion layer composition.
An Mg-2Zn-0.6Zr-0.6Nd alloy for biodegradable cardiovascular stent applications was prepared through indirect extrusion. The alloy exhibited a superior combination of tensile yield strength (TYS), ultimate tensile strength (UTS) and elongation (EL) of about 269 MPa, 298 MPa and 25.6%, respectively. In addition, the non-destructive electrochemical frequency modulation (EFM) technique was used for the first time to investigate the corrosion behavior of Mg alloys combined with electrochemical impedance spectroscopy (EIS) in Dulbecco's Modified Eagle's Medium (DMEM) and in Hank's solution. Compared with the corrosion rate of 0.07 mm/year in Hank's solution, lower corrosion rate of 0.03 mm/year was achieved in DMEM. The significant differences between the corrosion rate trends were discussed and related with the composition of the corrosion layer formed. Depending on the biomimetic fluids tested, different corrosion products were precipitated on the alloy's surface: a compact and homogeneous layer of MgxCay(PO4)(z) and Zn(OH)(2) and organic compounds was formed in DMEM, whereas a partial coverage of MgxCay(PO4)(z) and Mg(OH)(2) was formed in Hank's solution. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available