51316-7842-Electrochemical Evaluation of Advanced Titanium Alloys for Potential Biomedical Applications

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Product Number: 51316-7842-SG

ISBN: 7842 2016 CP

Author: Vilupanur Ravi

Publication Date: 2016

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Modern biomedical implant materials include titanium alloys e.g. Ti-6Al-4V (Ti64). While these metallic alloys perform well in general there is an ongoing need to have longer lasting implants given the rapid increase in the longevity of the world's population. Aseptic loosening is a critical issue limiting the durability of implants and is caused by the deterioration of the bone adjacent to the implant by osteoclasts resulting in the loosening of the implant. A new class of titanium alloys containing boron has shown increases in yield and tensile strengths. In order to evaluate the potential of these alloys for biomedical implant applications e.g. hip and knee replacements we have been investigating the corrosion behavior and biocompatibility of several types of titanium-boron alloys in a comprehensive long-term study. In this presentation we will report on the corrosion behavior of Ti-6Al-4V alloys with different boron contents in lactated Ringer's solutions using a modified test based on ASTM F2129. The electrochemical data were analyzed to compute corrosion potentials and corrosion currents. The results of these tests will be compared to corrosion data obtained for tests in Hank's Balanced Salt Solutions and Phosphate Buffered Saline. Results of corrosion tests in unbuffered saline buffered saline and bovine blood serum saline will also be discussed.