A Study of Inhibition Action of Propargyl Alcohol during Anodic Dissolution of Iron in Hydrochloric Acid

The effect of propargyl alcohol (PA) on iron dissolution reaction in deaerated hydrochloric acid was studied by several electrochemical methods. Results of quasi‐steady‐state polarization measurements showed that PA strongly influences the chloride‐involving dissolution reaction proceeding at lower anodic potentials. The values of polarization resistance and double‐layer capacitance obtained by analysis of impedance spectra indicate a change of protective properties of an organic protective film with time. The impedance spectra taken at three different anodic potentials showed the potential dependence of adsorption/desorption process of electroactive intermediates.