Comparative study of some metallic biomaterials used as implants

✍ Scribed by N. A. Al-Mobarak

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 267 KB
• Volume: 39
• Category: Article
• ISSN: 0933-5137
• DOI: 10.1002/mawe.200700310

✦ Synopsis

The electrochemical behavior of two Ti alloys (TA and TAV) and two grades of stainless steels (SS 1 and SS 2 ), commonly used as biomedical implant materials, particularly for orthopedic and osteosynthesis applications, was investigated in Hank's solution at 37 C and different pH. The aim was to distinguish between the behavior of these materials in artificial physiological solution through analysis of their corrosion potential variation with time and potentiodynamic polarization curves. Characterization of the modified surface layers was made by means of microscopic examinations, hardness measurements and X-ray diffraction analysis. The results indicated that in neutral Hank's solution (pH = 7.2) SS 2 and SS 1 samples were of higher corrosion resistance than titanium alloys. The behavior was reversed in the acidic media (pH = 5.0 or 3.0), where TA had the least corrosion rate and the corrosion susceptibility increased in the order TA < TAV < SS 1 < SS 2 .