Electropolymerization of Ortho-bromophenol on Pt-Electrode from Aqueous Acidic Solution; Kinetics, Mechanism, Electrochemical Studies and Characterization of the Polymer Obtained

In this study electrochemical oxidation of o-bromophenol (OBP) on platinum electrode has been investigated using cyclic voltammograms in acid solutions under nitrogen atmosphere at different reaction conditions such as sulfuric acid concentration, monomer concentration and temperature The experimentally obtained kinetic equation was Rp = KE [H2SO4]1.14 [M] 0.96, which was deduced from the values of the first anodic current density (ipI). A simplified mechanism for the electrochemical reaction of OBP is proposed and the apparent activation energy was determined. The obtained polymer films were characterized by 1H-NMR, elemental analysis, IR, UV spectroscopy, thermogravimetric analysis (TGA), X-ray and scanning electron microscopic (SEM) analysis. Conventional electrochemical techniques for the obtained polymer such as open circuit potential measurements, polarization methods and electrochemical impedance spectroscopy (EIS) were used to investigate the application of the prepared polymer as corrosion inhibitors for mild steel in acid medium PH = 2.