Oral Presentation

Localized Corrosion Behavior of Titanium Alloys

Titanium and its alloys have been used in numerous applications, ranging from aerospace to biomedical. The mechanical properties as well as excellent corrosion behavior of these alloys have made it an ideal choice for a broad range of applications including aerospace, naval, sports and implants. Previous research conducted by this group has indicated that the addition of small amounts of boron may have helped improve corrosion behavior and biocompatibility of different titanium alloys using bulk dc and ac methods. To further elucidate the effect of boron on the corrosion behavior of titanium systems, this study is focused on the deployment of localized techniques, e.g., using a scanning droplet cell, to analysis corrosion behavior in small areas across different regions of a corrosion test coupon. The materials to be studied in this manner would include boron-containing alloys of Ti-6Al-4V (Ti64; UNS R56400) and commercial purity titanium (CP Ti; UNS R50400). The test solutions will include simulated seawater, saline, etc. Localized open circuit, linear polarization and cyclic potentiodynamic polarization measurements will be used to determine the local corrosion potential, resistance to polarization and the onset of pitting corrosion. This will allow for the analysis of the formation of the passive film in these unique alloys. Surface profiling will be conducted using both contact and non-contact techniques to provide further insights into the material behavior in these solutions