MONOMER (3-AMINO-1,2,4-TRIAZOLE) ELECTROP OLYMERIZATION ON A COPPER ELECTRODE AND EFFECT OF THE POLYMER ON ELECTRODE CORROSION IN A 3-PERCENT NACL SOLUTION

The electrochemical polymerization of a new polymer is described. The monomer used was 3-amino-1,2,4-triazole (ATA) and the supporting mediu m was distilled water/methyl alcohol containing KOH. Scanning electron ic microscopy (SEM), cyclic voltammetry and chronoamperometry were use d, to characterize the new polymer. The same techniques were also used to study the nature of corrosion inhibition processes caused by the f ormation of the polymer on copper in NaCl 3%. The in-situ electropolym erization of the monomer gives an insulating polymer. Heat treatment o f the polymer improves its homogeneity and adherence to the copper ele ctrode on which it is formed. A mechanism for the formation of the pol y-ATA is proposed. The formation of the polymer gives rise to a decrea se in both anodic and cathodic currents. The rates of oxygen reduction and copper dissolution reactions are considerably decreased.