Impedance Measurements during Anodization of Aluminum
- 1 May 1979
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 126 (5) , 779-785
- https://doi.org/10.1149/1.2129138
Abstract
The impedance of a growing anodic oxide layer is inductive in a certain frequency range. This effect is related to the occurrence of transients after changes in current density or applied electric field. Measurements on aluminum samples in the frequency range 5 mHz‐10 kHz and the current density range and in various electrolytes are presented and compared with a theory in which the relaxation effect is ascribed to a buildup of surface charge at the metal‐oxide interface.Keywords
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