Biocorrosion studies of surface modified bioimplant material in simulated body fluids.

摘要

The present study has investigated the electrochemical behaviors involved in (a) Microbiogically Influenced Corrosion (MIC) of stainless steel (SS-304) using Electrochemical Noise (ECN) in artificial saliva solutions, (b) commercial TiO2 nanoparticles-coated Ti-6Al-4V, and (c) the effect of LASER treatment on Ti-6Al-4V, using TAFEL analysis and Electrochemical Impedance Spectroscopy (EIS) in simulated biofluids. Corrosion behaviors of SS-304, attached with Acidithiobacilus ferrooxidans (ATF) bacteria and exposed to artificial saliva solutions have been monitored by using a non-destructive measurement (ECN analysis) and signal processing techniques. Corrosion behaviors of the TiO2 nanoparticles coated bioimplant Ti-6Al-4V were exposed to three different simulated biofluids (SBF) were studied using electrochemical techniques including open circuit voltage (OCV), TAFEL analysis, and EIS. A commercial Ti-6Al-4V alloy was treated with a pulsed-wave Nd:YAG laser under various process conditions. The corrosion behaviors of bare and laser-treated Ti-6Al-4V exposed to three different SBFs were studied by using various electrochemical techniques.