alexa Degradation performance of biodegradable Fe-Mn-C(-Pd) alloys.
General Science

General Science

Journal of Biotechnology & Biomaterials

Author(s): Schinhammer M, Steiger P, Moszner F, Lffler JF, Uggowitzer PJ

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Abstract Biodegradable metals offer great potential in circumventing the long-term risks and side effects of medical implants. Austenitic Fe-Mn-C-Pd alloys feature a well-balanced combination of high strength and considerable ductility which make them attractive for use as degradable implant material. The focus of this study is the evaluation of the degradation performance of these alloys by means of immersion testing and electrochemical impedance spectroscopy in simulated body fluid. The Fe-Mn-C-Pd alloys are characterized by an increased degradation rate compared to pure Fe, as revealed by both techniques. Electrochemical measurements turned out to be a sensitive tool for investigating the degradation behavior. They not only show that the polarization resistance is a measure of corrosion tendency, but also provide information on the evolution of the degradation product layers. The mass loss data from immersion tests indicate a decreasing degradation rate for longer times due to the formation of degradation products on the sample surfaces. The results are discussed in detail in terms of the degradation mechanism of Fe-based alloys in physiological media. Copyright © 2012 Elsevier B.V. All rights reserved. This article was published in Mater Sci Eng C Mater Biol Appl and referenced in Journal of Biotechnology & Biomaterials

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