Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2016 Vol: 8 Issue: 3

Synthesis, characterization and performance of hydroxyapatite coated 316L stainless steel,

Abstract

Hydroxyapatite, a major component and an essential ingredient of normal bone and teeth were synthesized by wet precipitation method. 316L Stainless steel (SS) are widely used for implantation in orthopedic surgery owing to corrosion resistance, mechanical property and low cost. Even though 316L SS are continuously being developed to replace implant materials used in the past, clinical studies show that these materials are also prone to corrosion to a certain extent. The localized corrosion attacks and discharge of metallic ions from implants demand improvement in the corrosion resistance of the currently used type 316L SS by modifying the surface. HAP coating was proposed to decrease the corrosion rate and improve the bioactivity of 316L SS. The surface morphology and elemental analysis of coated HAP powder on 316L SS substrate was investigated using Field Emission Scanning Electron Microscope (FESEM) and Energy Dispersive X-ray Spectroscopy (EDAX). From the results of X-Ray Diffraction (XRD) study, the peaks correspond to crystallographic structure of HAP in the coated surface. The presence of functional group bands of HAP coating was studied using Fourier Transform Infrared Spectroscopy (FTIR). The surface roughness, film stress and coating thickness were determined by stylus Profilometer Dektak XT. The electrochemical potentiodynamic polarization tests were performed in physiological solutions at 37±1◦C to investigate the corrosion behavior of uncoated and HAP coated 316L SS. Thus, it was observed from the experimental data that the developed HAP coating on 316L SS substrate would be ideal for orthopedic applications

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