The Effect of Coating Thickness on Corrosion Resistance of Hydroxyapatite Coated Ti6Al4V and 316L SS Implants |
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Authors: | B Aksakal M Gavgali B Dikici |
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Affiliation: | (1) Department of Mechanical Education, Technical Education Faculty, Firat University, 23119 Elazig, Turkey;(2) Department of Mechanical Engineering, Ataturk University, 25240 Erzurum, Turkey;(3) Ercis Technical Vocational School of Higher Education, Yuzuncu Yil University, 65400 Van, Turkey |
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Abstract: | Hydroxyapatite (HAP) has been coated onto Ti6Al4V and 316L SS substrates by sol-gel method. The coating thicknesses for the
analysis were about 40 and 72 μm. Adhesion and corrosion tests have been conducted on uncoated and HAP-coated substrates.
The coatings were characterized by XRD, SEM, and adhesion analysis. The corrosion resistance was examined in vitro by potentiodynamic
polarization technique in Ringer’s solution at room temperature. Electrochemical analysis indicated that the highest corrosion
susceptibility was found on 72-μm-coated 316L SS, and the 40-μm HAP-coated Ti6Al4V showed the highest corrosion resistance.
It was observed that the coating thickness was an effective parameter on both adhesion and corrosion resistance. It was shown
that adhesion and corrosion resistance decreased with increasing coating thickness on both substrates. |
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