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E-Journal of Chemistry
Volume 6, Issue 3, Pages 880-886
http://dx.doi.org/10.1155/2009/579860

Growth Kinetics of Anodic Oxide Films Formed on Zircaloy-2 in Various Electrolytes

V. Jeevana Jyothi1 and CH. Anjaneyulu2

1Department of Chemistry, R.B.V.R.R.Women’s College, Narayanguda, Hyderabad, India
2Department of Chemistry, University College for Women, Osmania University, Hyderabad-500007, India

Received 5 November 2008; Revised 13 January 2009; Accepted 5 February 2009

Copyright © 2009 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The Kinetics of anodic oxidation of zircaloy-2 have been studied at current densities ranging from 4 to 12 mA cm-2 at room temperature in order to investigate the dependence of ionic current density on the field across the oxide film. Thickness of the anodic films was estimated from capacitance data. The formation rate, current efficiency and differential field were found to increase with increase in the ionic current density for zircaloy-2. Plots of logarithm of formation rate vs. logarithm of current density is fairly linear. From linear plots of logarithm of ionic current density vs. differential field and applying the Cabrera - Mott theory, the half - jump distance (a) and height of energy barrier (W) were deduced.