Influence of the Solution Ionic Mobility on the Impedance Response of Organic Coatings

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.

keywords

EXPERIMENTAL DIELECTRIC DATA; SIGNAL AC RESPONSE; BARRIER COATINGS; EIS; METALS; FILMS

subject category

Electrochemistry; Materials Science

authors

Duarte, RG; Castela, AS; Ferreira, MGS

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".