Relaxation and resonance processes in organic films

Dielectric spectra of protective organic films at different mechanical pressures in the frequency range of [Formula: see text] [Formula: see text]Hz have been experimentally investigated. The films were obtained on the surface of rolled steel from a unimolar solution of sulfuric acid using a new organic compound of the imidazole class as an inhibitor by varying the adsorption time of the additive and its concentration. The films are characterized by the presence of negative electrical capacitance and high through conductivity. Three dielectric dispersions are observed in the spectra, two of which have a relaxation character and one of which is resonant. The negativity of the electrical capacity of the investigated films is apparently due to three factors: High-frequency relaxation and resonance processes in electric fields with inverse field strength and low-frequency hopping-type conduction processes. To interpret the high-frequency relaxation polarization with inverse electric field strength, an impedance model of an organic film sample is used in the form of an equivalent current divider circuit consisting of series and parallel RC circuits. The comparison of experimentally measured electrical parameters of various films with approximated results within the framework of the described model showed their good agreement.