Iranian Journal of Materials Science and Engineering
Iran University of Science & Technology
Tue, Nov 26, 2024
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Volume 12, Issue 2 (June 2015)
IJMSE 2015, 12(2): 91-100 |
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Noori S, Khalil-Allafi J. EFFECT OF ANODIC OXIDATION ON THE CORROSION BEHAVIOR OF NICKEL-TITANIUM SHAPE MEMORY ALLOYS IN SIMULATED BODY FLUIDS (SBF). IJMSE 2015; 12 (2) :91-100
URL: http://ijmse.iust.ac.ir/article-1-806-en.html
URL: http://ijmse.iust.ac.ir/article-1-806-en.html
Abstract: (19050 Views)
The effect of anodic oxidation of a NiTi shape memory alloy in sulfuric acid electrolyte on its surface
characteristics was studied. Surface roughness was measured by roughness tester. Surface morphology was studied
using optical microscopy (OM) and scanning electron microscopy (SEM). Corrosion behavior was specified by
recording Potentiodynamic polarization curves and measuring the content of Ni ions, released into a SBF solution
using atomic absorption spectroscopy (AAS). Fourier transformation infrared radiation (FT-IR) and energy dispersive
spectroscopy were employed to verify the biocompatibility of the anodized and bare alloys after submersion in SBF. It
was shown that anodic oxidation in sulfuric acid significantly increases corrosion resistance and biocompatibility. This
layer improves corrosion resistance and Ni ion-release resistance by impeding the direct contact of the alloy with the
corrosion mediums i.e. Ringer and SBF solutions. The TiO2 oxide layer also decreases the releasing of Ni ions in to
SBF solution
Type of Study: Research Paper |
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