Current oscillations during the anodic dissolution of copper in trifluoroacetic acid

A phenomenon of current oscillators was characterized crosswise active–passive potential region during the electrodissolution of copper electrode in trifluoroacetic acid (TFA). The current density-potential curves show two transition points. A potential region of current oscillations was found as a...

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Bibliographic Details
Published in:Corrosion science 2010-05, Vol.52 (5), p.1618-1624
Main Authors: Potkonjak, Nebojša I., Potkonjak, Tanja.N., Blagojević, Stevan.N., Dudić, Boris, Randjelović, Danijela V.
Format: Article
Language:English
Subjects:
A. Copper
ACETIC ACID
ANODES
Anodic dissolution
Applied sciences
B. Polarization
B. Potentiostatic
C. Acid corrosion
C. Passivity
Constraining
Copper
Corrosion
Corrosion environments
CURRENT DENSITY
DISSOLUTION
ELECTRODES
Electrodissolution
Exact sciences and technology
Metals. Metallurgy
Oscillations
Oscillators
Transition points
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Summary:A phenomenon of current oscillators was characterized crosswise active–passive potential region during the electrodissolution of copper electrode in trifluoroacetic acid (TFA). The current density-potential curves show two transition points. A potential region of current oscillations was found as a part of limiting current region. The Cu|TFA electrochemical oscillator was found to displaying rich dynamical response on varying the temperature and the applied potential. The Cu|TFA system display current oscillation behaviour from the mono-periodic to the mixed-mode (relaxation type). Changes of the electrode surface structure and morphology were investigated by X-ray diffraction spectroscopy, atomic forced microscopy and optical microscopy.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2010.02.021