Anodic Coating on Aluminum in Anhydrous 1M H2SO4-Dimethylformamide Solution

At sufficiently high anodic polarization an amorphous layer is formed on Al electrodes. This was shown by electron diffraction methods, backed by characteristic dependencies of the anodic current density/potential curves, potentiostatic switching curves and ohmic resistance on the frequency of rotat...

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Bibliographic Details
Published in:Electrochimica acta 1982-02, Vol.27 (2), p.177-181
Main Authors: Ebersbach, U, Banas, J
Format: Article
Language:ger
Online Access:Get full text
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Summary:At sufficiently high anodic polarization an amorphous layer is formed on Al electrodes. This was shown by electron diffraction methods, backed by characteristic dependencies of the anodic current density/potential curves, potentiostatic switching curves and ohmic resistance on the frequency of rotation of the electrode disk using an interrupter potential. From transmission electron diffraction and energy dispersive microanalytic investigation, the existence of amorphous Al2(SO4)3 can be concluded. Morphological and structural changes of the electrode surface, depending on the potential, were investigated additionally by SEM and reflection electron diffraction. A model of the film is suggested.--EAA/AF.
ISSN:0013-4686