Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry
ISSN: 0975-413X
Abstract
Impedance and Corrosion Resistance Characteristics of Reanodized Anodic Alumina Film on AA 5052
Author(s): Naveen Verma, Krishan C Singh, Jitender Jindal, Anuj MittalComplex anodic alumina films were preapered by the reanodization of porous anodic oxide films on aluminium alloy (AA) 5052. The AA 5052 samples were anodized first in H2SO4 for 30 min at 15 V. The reanodization was performed in 0.1 M ammonium pentaborate solution at 15 V for 5 and 10 min. Electrochemical impedance spectroscopy was employed to characterize these complex films. Polarization studies show that the corrosion rate decreases significantly by reanodization and it is further decreases with an increase in reanodization time. Reanodization is found a good method to increase corrosion resistance properties of porous anodic oxide film. Morphologically, no significant difference was observed between simple and complex film as shown in Field Emission Scanning Electron Microscope (FESEM) images. The electrochemical impedance data was fitted with equivalent circuit containing a Constant Phase Element (CPE) and fitted parameters were calculated.
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