Corrosion of aluminium in acidic and neutral solutions

Corrosion of aluminium in acidic and neutral solutions

Polarization and impedance measurements were performed to study the corrosion behaviour of aluminium in acidic and nearly neutral solutions. The impedance diagram shows at least three time constants or semi-circles of which the size are dependent on the electrode potential. This indicates that at le...

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Veröffentlicht in:Electrochimica acta 1993-10, Vol.38 (14), p.1989-1992
Hauptverfasser: Lenderink, H.J.W., Linden, M.V.D., De Wit, J.H.W.
Format: Artikel
Sprache:eng
Schlagworte:
aluminium
Applied sciences
Corrosion
Corrosion environments
effect pH
Exact sciences and technology
impedance measurements
Metals. Metallurgy
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Zusammenfassung:Polarization and impedance measurements were performed to study the corrosion behaviour of aluminium in acidic and nearly neutral solutions. The impedance diagram shows at least three time constants or semi-circles of which the size are dependent on the electrode potential. This indicates that at least three potential dependent processes are occurring. The capacitive time constant at high frequencies may be related to the oxide film itself. The second capacitive time constant at low frequencies can be attributed to the dissolution of the oxide film.
ISSN:0013-4686
1873-3859
DOI:10.1016/0013-4686(93)80329-X