Shirdar, Mostafa Rezazadeh and Izman, Sudin and Taheri, Mohammad Mahdi (2015) Effect of post-treatment techniques on corrosion and wettability of hydroxyapatite-coated Co–Cr–Mo Alloy. Arabian Journal for Science and Engineering, 40 (4). pp. 1197-1203. ISSN 2193-567X
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Official URL: http://dx.doi.org/10.1007/s13369-015-1611-3
Abstract
This study is a comparison between the effect of sintering and alkaline post-treatment techniques on calcium phosphate-coated Co–Cr–Mo alloy in terms of electrochemical corrosion behavior and wettability. The Co–Cr–Mo substrates were electrophoretically coated by calcium phosphate in a solution of Ca(NO3) · 4H2O and NH4H2PO4. The sintering and alkaline post-treatment techniques were then conducted to convert an as-deposited dicalcium phosphate dihydrate phase to crystalline hydroxyapatite (HA). The coated layers were characterized in terms of phase, crystallinity and composition using X-ray diffraction, Fourier transform infrared spectroscopy and energy-dispersive spectroscopy. In addition, morphology and thickness of coated layers were evaluated using a scanning electron microscope. The results indicate HA-coated samples with a sintering post-treatment technique exhibit more improvement in corrosion parameters, such as corrosion potential (Ecorr) and corrosion current density (Icorr), but lower enhancement in hydrophilicity. However, the HA-coated samples with an alkaline post-treatment technique reveal higher hydrophilicity with lower improvement in corrosion resistance.
Item Type: | Article |
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Uncontrolled Keywords: | corrosion, Co–Cr–Mo, electrophoretic deposition (EPD), post-treatment, wettability |
Subjects: | T Technology > TJ Mechanical engineering and machinery |
Divisions: | Mechanical Engineering |
ID Code: | 58383 |
Deposited By: | Haliza Zainal |
Deposited On: | 04 Dec 2016 04:07 |
Last Modified: | 16 Aug 2021 02:25 |
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