Trans Tech Publications, Solid State Phenomena, (227), p. 443-446, 2015
DOI: 10.4028/www.scientific.net/ssp.227.443
Full text: Download
The pitting potential,Epit, of the passive layer on the implant alloy can be treated as an accelerated laboratory test to assessment a susceptibility to pitting corrosion of metallic biomaterials in simulated body fluids. This study deals with an evaluation ofEpitof the self-passivated TiO2layer formed on the surface of the NiTi implant alloy as a function of the scan rate of polarization. Cyclic potentiodynamic studies were performed in Ringer’s solution at 37°C. It was found out that the more noble value ofEpitin the range of 0.99-2 V was registered at a given polarization scan rate that ranged from 0.16 to 2 mV s-1, the lower susceptibility of the self-passivated NiTi implant alloy to the initiation of pits was detected.