Journal
JOURNAL OF MAGNESIUM AND ALLOYS
Volume 9, Issue 5, Pages 1820-1833Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2021.07.002
Keywords
Degradation layer; Protein; Biodegradable Mg alloy; Dynamic deformation; Impedance
Categories
Funding
- National Key R&D Program of China [2017YFB0305100, 2017YFB0305104]
- Science and Technology Planning Project of Guangdong Province [2021A0505030042]
- Jinan University [21620110]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515110580]
Ask authors/readers for more resources
The study investigates the effects of dynamic deformation on the interface layer of biomedical Mg-1Zn alloy, revealing that the presence of proteins can improve the corrosion resistance of the surface degradation layer. A relationship between dynamic deformation of Mg alloy and the impedance of the degradation layer is established, highlighting the importance of in situ characterization of surface layer evolution under dynamic conditions.
Magnesium (Mg) alloys are attractive biodegradable implant materials. The degradation products on Mg alloys play a critical role in the stability of the interface between implant and surrounding tissue. In the present study, the effects of dynamic deformation on the interface layer of biomedical Mg-1Zn alloy were investigated using the constant extension rate tensile tests (CERT) coupled with electrochemical impedance spectroscopy (EIS). The deformation of the Mg-1Zn alloy had an adverse influence on the impedance of the surface degradation layer formed in simulated body fluid that only containing inorganic compounds. However, the surface degradation layer with improved corrosion resistance was obtained for the strained samples tested in protein-containing simulated body fluid. The spontaneous or enhanced adsorption of protein into the degradation product led to a flexible and stable hybrid anti-corrosive layer. A relationship between the dynamic deformation of Mg alloy and the impendence of the degradation layer was established, which demonstrates the necessity for in situ characterisation of the evolution of the surface layer under dynamic condition. (C) 2021 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.
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