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EIS studies of anodic aluminum oxide films

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Abstract

Samples of AA 6061 alloy and Al 5N were anodized at constant potential conditions and sealed in distilled boiling water. Immersion tests in high purity water were also carried out on AA 6061 samples at open circuit potential. EIS measurements were then performed in order to investigate the properties of the oxides obtained.

For sealed anodic oxides on AA 6061 and Al 5N, EIS experimental data was useful to differentiate between the capacitances of the two layers present in the oxide, named the barrier and porous layers. EIS data obtained for oxide layers grown at open circuit potential in AA 6061 allowed estimating the capacitance of the barrier layer, which value was greater than the barrier layer capacitance present in anodic oxides.

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Authors and Affiliations

  1. Unidad de Actividad Materiales, Centro Atomico Constituyentes - CNEA, Av. Gral. Paz 1499, B1650KNA, San Martin - Buenos Aires, Argentina

    Evelina M. Linardi, Liliana A. Lanzani & Juan R. Collet Lacoste

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  1. Evelina M. Linardi
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  2. Liliana A. Lanzani
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  3. Juan R. Collet Lacoste
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Linardi, E.M., Lanzani, L.A. & Lacoste, J.R.C. EIS studies of anodic aluminum oxide films. MRS Online Proceedings Library 1475, 305–310 (2012). https://doi.org/10.1557/opl.2012.591

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  • DOI: https://doi.org/10.1557/opl.2012.591

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