Assessment of Corrosion Resistance and Metal Ion Leaching of Nitinol Alloys |
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| Authors: | Waseem Haider Norman Munroe |
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| Affiliation: | 1. Department of Materials Science and Engineering, Penn State University, University Park, PA, USA
2. Applied Research Center, Florida International University, Miami, FL, USA
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| Abstract: | Nitinol usage for biomedical implant devices has received significant attention due to its high corrosion resistance and biocompatibility. However, surface treatments are known to affect surface charge, surface chemistry, morphology, wettability, and corrosion resistance. In this investigation, the corrosion resistance of a binary and various ternary Nitinol alloys was determined after being subjected to electropolishing, magnetoelectropolishing, and water boiling and passivation. Cyclic polarization in vitro corrosion tests were conducted in Phosphate Buffer Saline (PBS) in compliance with ASTM F 2129-08 before and after surface treatments. The concentrations of dissolved metal ions in the electrolyte were also determined by ICPMS. |
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