Corrosion evaluation of Ti-48Al-2Cr-2Nb (at.%) in Ringer's solution.
The corrosion behavior of Ti-48Al-2Cr-2Nb (at.%) in Ringer's solution was studied to evaluate its potential as a biocompatible material. Corrosion properties of Ti-6Al-4V were determined under the same conditions for comparison. Two electrochemical techniques, potentiodynamic anodic polarization and electrochemical impedance spectroscopy, were employed to test Ti-48Al-2Cr-2Nb and Ti-6Al-4V. Surface modifications to the samples were made by autoclaving and by oxidation in air at 500 degrees C and 800 degrees C. The results show excellent corrosion resistance for unmodified Ti-48Al-2Cr-2Nb, corroborated by the high values of polarization resistance and corrosion potential and low values of corrosion current and corrosion rate. Ti-48Al-2Cr-2Nb appears to possess corrosion characteristics similar to Ti-6Al-4V. Surface modification rendered the Ti-48Al-2Cr-2Nb material extremely corrosion resistant.
Delgado-Alvarado
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Department of Mechanical Engineering, University of Puerto Rico, P.O. Box 9045, Mayagüez, PR 00680, USA.
Sundaram
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PA
D000497:Alloys / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry*; D040761:Biomimetic Materials / Q000737:chemistry; D001826:Body Fluids / Q000737:chemistry*; D003198:Computer Simulation; D003343:Corrosion; D007552:Isotonic Solutions / Q000737:chemistry*; D008422:Materials Testing; D008956:Models, Chemical; D019736:Prostheses and Implants; D000077331:Ringer's Solution; D014025:Titanium / Q000737:chemistry
D000497:Alloys; D001672:Biocompatible Materials; D007552:Isotonic Solutions; D000077331:Ringer's Solution; D014025:Titanium