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Austenitic Fe-30Mn-1C (FeMnC) is a prospective biodegradable implant materialcombining high mechanical integrity with adequate corrosion rates. The fastsolidified TWIP alloy, its constituents and 316L stainless steel wereelectrochemically analysed in various electrolytes at 37 {\deg}C under laminarflow. Potentiodynamic polarization tests were conducted in Trisbufferedsimulated body fluid (SBF), in Tris-buffered saline (TBS) and in 150 mM - 0.15mM NaCl solutions (pH 7.6, 10, 5, 2) to study initial corrosion stages. Activedissolution of FeMnC is revealed in all electrolytes and is discussed on basisof 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 criticallyassessed, particularly with view to the sensitivity of Fe. SEM studies of FeMnCcorroded in NaCl revealed preferential dissolution along Mn-rich grain boundaryregions. Static immersion tests of FeMnC in SBF with surface and solutionanalyses (SEM/EDX, XPS, ICP-OES) indicated that dissolution processes interferewith the formation of permeable surface coatings comprising hydroxides andsalts.

Corrosion studies on Fe-30Mn-1C alloy in chloridecontaining solutions with view to biomedical application