University of the Punjab Conference Portal, Third International Conference on Engineering Sciences

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Anodizing of Zirconium-2 alloy and its use in dental implants
Ameeq Farooq, Usama Bin Ali, Muhammad Ahsan, Rafiq Ahmad

Last modified: 2017-10-14

Abstract


Present work describes the anodization of zirconium-2 alloy used as dental implants. The samples were anodized in different strong acid solutions at constant voltage of 30V for 2 hours in two electrode cell. 0.01, 0.03 and 0.05 molar concentration of sulphuric acid (H2SO4) with fixed concentration of ammonium fluoride and 1 molar phosphoric acid (H3PO4) was used as electrolyte for anodizing. Scanning electron microscopy (SEM) was used to examine the oxide layer formed on zirconium specimen in different electrolye. Electron Dispersive Spectroscopy (EDS) was used to analyzed the composition of the oxide layer. Potentiodynamic polarization and Electrochemical Impedance Spectroscopy were used to find the electrochemial behavior of anodized zirconium in saline solution at 37oC.The results of SEM shows that sulphur in case of sulphuric acid electrolyte, incorporates an oxide layer but the fluoride ions undergo dissolution produce stress which may cause fracture of oxide layer hence irregular surface obtained. In H3PO4, the phosphate ions incorporate and there is increase of oxide layer. Potentiodyamnic polarization in saline also confirmed the results of SEM.