Corrosion studies on Fe-30Mn-1C alloy in chloride-containing solutions with view to biomedical application
Gebert, Annett (Institut für Festkörper- und Werkstofforschung Dresden)
Kochta, Fabian (Institut für Festkörper- und Werkstofforschung Dresden)
Voß, Andrea (Institut für Festkörper- und Werkstofforschung Dresden)
Oswald, Steffen (Institut für Festkörper- und Werkstofforschung Dresden)
Fernández Barcia, Mónica (Institut für Festkörper- und Werkstofforschung Dresden)
Kühn, U. (Institut für Festkörper- und Werkstofforschung Dresden)
Hufenbach, Julia K. (Institut für Festkörper- und Werkstofforschung Dresden)

Data:	2018
Resum:	Austenitic Fe-30Mn-1C (FeMnC) is a prospective biodegradable implant material combining high mechanical integrity with adequate corrosion rates. The fast solidified TWIP alloy, its constituents and 316L stainless steel were electrochemically analysed in various electrolytes at 37 °C under laminar flow. Potentiodynamic polarization tests were conducted in Tris-buffered simulated body fluid (SBF), in Tris-buffered saline (TBS) and in 150-0. 15 mM NaCl solutions (pH 7. 6, 10, 5, 2) to study initial corrosion stages. Active dissolution of FeMnC is revealed in all electrolytes and is discussed on basis of the Fe and Mn behaviour plus is compared to that of 316L. The role of Tris (Tris(hydroxymethyl)aminomethane) as organic buffer for SBFs is critically assessed, particularly with view to the sensitivity of Fe. SEM studies of FeMnC corroded in NaCl revealed preferential dissolution along Mn-rich grain boundary regions. Static immersion tests of FeMnC in SBF with surface and solution analyses (SEM/EDX, XPS, ICP-OES) indicated that dissolution processes interfere with the formation of permeable surface coatings comprising hydroxides and salts.
Ajuts:	European Commission 642642
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Biodegradable metal ; Corrosion ; Fe-based TWIP alloy ; Microstructure ; Simulated body fluid
Publicat a:	Materials and corrosion, Vol. 69, Issue 2 (February 2018) , p. 167-177, ISSN 1521-4176

DOI: 10.1002/maco.201709476

Postprint 25 p, 2.2 MB

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