Abstract
AbstractThe electrochemical behavior of steel alloy in 30% ethylene glycol‐water solution at different solution rotating speeds was investigated by polarization curves and AC impedance measurements. The results obtained showed that corrosion rate was not changed significantly in different rotating speed. The effect of ethylenediamine as inhibitor was studied and high inhibition efficiency was obtained. It was found that inhibitor adsorption was occurred in presence of inhibitor. The inhibiting effect of the ethylenediamine was explained on the basis of the competitive adsorption between the inhibitor and the aggressive Cl– ions and the adsorption isotherm basically obeys the Langmuir adsorption isotherm. Thermodynamic parameters for inhibitor adsorption were determined and reveal that the adsorption process is spontaneous.
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