Impedance of an Aluminum Electrode with a Nanoporous Oxide

The methods of electrochemical impedance spectroscopy and electron microscopy with X-ray electron probe analysis are used to study two types of oxide films on aluminum: a smooth compact one and a porous one (nanooxide) formed by two-stage oxidation. An equivalent circuit is chosen that agrees well w...

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Veröffentlicht in:	Protection of metals and physical chemistry of surfaces 2019-07, Vol.55 (4), p.689-694
Hauptverfasser:	Shcherbakov, A. I., Korosteleva, I. G., Kasatkina, I. V., Kasatkin, V. E., Kornienko, L. P., Dorofeeva, V. N., Vysotskii, V. V., Kotenev, V. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum Characterization and Evaluation of Materials Chemistry and Materials Science Corrosion and Coatings Electrochemical impedance spectroscopy Electron probe microanalysis Electron probes Equivalent circuits Industrial Chemistry/Chemical Engineering Inorganic Chemistry Materials Science Metallic Materials Nanoscale and Nanostructured Materials and Coatings Oxidation Oxide coatings Porosity Spectrum analysis Tribology
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Beschreibung
Zusammenfassung:	The methods of electrochemical impedance spectroscopy and electron microscopy with X-ray electron probe analysis are used to study two types of oxide films on aluminum: a smooth compact one and a porous one (nanooxide) formed by two-stage oxidation. An equivalent circuit is chosen that agrees well with the obtained impedance spectra and allows estimating the thickness and conductivity of barrier oxide layers and also the area occupied by nanopores for various film types.
ISSN:	2070-2051 2070-206X
DOI:	10.1134/S2070205119040208