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The dielectric study of a coal tar epoxy coating (CROSBI ID 168809)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Metikoš-Huković, Mirjana ; Rešetić, Antonija ; Babić, Ranko The dielectric study of a coal tar epoxy coating // Thin solid films, 230 (1993), 2; 128-132. doi: 10.1016/0040-6090(93)90504-I

Podaci o odgovornosti

Metikoš-Huković, Mirjana ; Rešetić, Antonija ; Babić, Ranko

engleski

The dielectric study of a coal tar epoxy coating

The dielectric properties of a coal tar epoxy coating on a steel surface in a dry dielectric layer, metal/organic coating/metal (MOCM) structures, as well as in electrochemical systems, metal/organic coating/electrolyte (MOCE), have been investigated by means of impedance spectroscopy. The influence of temperature and chemically-different contacting electrolytes on the electrical properties of the organic coating are discussed on the basis of the frequency-dependent impedance modulus and the phase angle which are both accessible through measurements. The results are presented in the form of Bode plots. It was possible to model the measured values of the modulus by the linear relation and in terms of Kramers-Kronig (KK) relations. It was shown that the poles and residues of the KK integrand suffice to establish theta uniquely. This means that if the modulus in the Bode plot can be represented by a linear relation with a slope -n, the phase angle is frequency-independent. The experimental results for theta are in good agreement with this prediction for a dry (MOCM) and an electrochemical system (MOCE).

steel; coal tar epoxy; dielectric properties; impedance spectroscopy

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Podaci o izdanju

230 (2)

1993.

128-132

objavljeno

0040-6090

10.1016/0040-6090(93)90504-I

Povezanost rada

Kemija

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