Influence of the Solution Ionic Mobility on the Impedance Response of Organic Coatings
authors Duarte, RG; Castela, AS; Ferreira, MGS
nationality International
journal ECS ELECTROCHEMISTRY LETTERS
keywords EXPERIMENTAL DIELECTRIC DATA; SIGNAL AC RESPONSE; BARRIER COATINGS; EIS; METALS; FILMS
abstract PVC (polyvinylchloride) Plastisol films immersed in electrolyte were studied by Electrochemical Impedance Spectroscopy (EIS) and the data were fitted using one-time constant and two time constant equivalent circuits. Very often the electrical behavior of these films is better represented by the second circuit. The first time constant can be associated with the film capacitance and is independent of the immersion solution ionic mobility, whereas the second one could be related with charge separation inside the film pores and depends on cation mobility. Since the physical meaning of the two time constants is acknowledged their presence in EIS measurements should be taken into account when the results are analyzed. (C) 2014 The Electrochemical Society. All rights reserved.
publisher ELECTROCHEMICAL SOC INC
issn 2162-8726
year published 2015
volume 4
issue 2
beginning page C11
ending page C14
digital object identifier (doi) 10.1149/2.0021502eel
web of science category Electrochemistry; Materials Science, Multidisciplinary
subject category Electrochemistry; Materials Science
unique article identifier WOS:000346769600003
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