Effect of surface modification on the in vitro corrosion resistance of Zr-2.5Nb.

ANDREA GOMEZ SANCHEZ; SILVIA FARIÑA; SILVIA M. CERÉ

Encuentro; Fourth Regional South East Europe Symposium on Electrochemistry; 2013

Surface modification induced by anodisation in the conditions presented in this work corresponds to a surface design criteria based on the modification of chemical and topological features in the nanometric range with the aim of promote osseointegration of zirconium and Zr2.5Nb as permanent implants. Since an additional requirement of metal implants is the corrosion resistance in body fluids for long periods, the electrochemical in vitro response of anodised samples were studied in order to determine the effect of the surface modification process on the corrosion resistance of these two candidate materials. No significative differences were observed between the pure Zr and the Zr2.5Nb alloy nether as received nor anodised. In the anodised samples, an increase of the total impedance modulus with respect as the as received condition, may be related to the thickening of the surface oxides.