Resumo

BENASSAOUI, H. et al. Electrosynthesis and Characterization of Adherent Poly (4-Amino-3 Methyl-1,2,4-Triazole-5-Thione) Films on B66 Bronze Electrode in Methanol. Port. Electrochim. Acta [online]. 2020, vol.38, n.5, pp.299-312. ISSN 0872-1904.  https://doi.org/10.4152/pea.202005299.

The electro-oxidation of 4-amino-3-methyl-1,2,4-triazole-5-thione (MTSNH) on a bronze substrate in an alkaline methanol solution produces a homogeneous polymer film. The formation kinetics of the film was investigated using cyclic voltammetry, chronoamperommetry and electrochemical impedance spectroscopy. Cyclic voltammograms indicated that the polymer film (pMTSNH) was formed anodically between -350 and 350 mV/SCE. During the second cycle, the oxidation peak of the monomer disappeared, indicating the formation of the insulating film. We have also shown that the monomer oxidation reaction is essentially irreversible and controlled by a diffusion process. The inhibition efficiency of this polymer was determined by potentiodynamic polarization and electrochemical impedance spectroscopy in a 3.5% NaCl solution.

Palavras-chave : cyclic voltammetry; chronoamperometry; B66 bronze alloy; corrosion; inhibition.

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