The aim of this study was to investigate the effects of immersion time on the electrochemical cor... more The aim of this study was to investigate the effects of immersion time on the electrochemical corrosion behaviour of three brass alloys in simulated acid rain at 25 o C, utilizing the electrochemical impedance spectroscopy (EIS). The main parameters of the corrosion process were established. The immersion of the alloys in simulated acid rain reduces the intensity of the corrosion process. For all the samples the polarization resistance (R p) is increasing with the immersion, from 1 minute to 1 hour and 1 day respectively. The EIS results exhibited relative capacitive behaviour (suitable corrosion resistance) with phase angle close to –70 o and relative large impedance values (order of 10 4 Ω cm 2) at low and medium frequencies, which are indicative of the formation of a stable oxide film on these brass samples in simulated acid rain. Equivalent circuits (EC) were used to modeling EIS data, in order to characterize samples surface.
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Papers by Iulian Rusu