Driss Chebabe - Departement of Chemisty, Faculty of Sciences and Techniques, Moulay Ismail University of Meknes, BP ۵۰۹, Boutalamine, ۵۲۰۰۰ Errachidia, Morocco
Mohamed Damej - Departement of Chemistry, Faculty of Sciences Kenitra, University of Ibn Tofail, Morocco
Ahmed Dermaj - Departement of Chemistry, Faculty of Sciences, University of Ibn Tofail, Kenitra, Morocco
Ahmad Oubair - Departement of Chemistry, Faculty of Sciences and Techniques, Moulay Ismail University of Meknes, BP ۵۰۹, Boutalamine, ۵۲۰۰۰ Errachidia, Morocco
Hayat Benassaoui - Departement of Chemistry, Facylty of Sciences, University of Ibn Tofail, Kenitra, Morocco
Hamid Erramli - Departement of Chemistry, Facylty of Sciences, University of Ibn Tofail, Kenitra, Morocco
Najat Hajjaji - Departement of Chemistry, Faculty of Sciences, University of Ibn Tofail, Kenitra, Morocco
Abdellah Srhiri - Sevichim Society SARL Productions of Corrosion Inhibitors, ۱۰۱ rue Maamoura, N° ۱۰, Kenitra, Morocco

This paper describes the kinetics of the electropolymerization of ۴-amino-۳-methyl-۱,۲,۴-triazole-۵-thiol (MTSNH) on a brass substrate in alkaline solution containing methanol. Our laboratory has developed a new synthesis strategy for MTSNH. This compound was purified and characterized by ۱HNMR and ۱۳CNMR spectroscopies. The electrochemical study was investigated using cyclic polarization, chronoamperometry, electrochemical impedance techniques and scanning electronic microscopy. The polymeric film was achieved by successive cyclic voltammetry sweep between ۰ and ۲.۲ V at the scan rate of ۱۰mV/s. The effect of the scan rate for ۱۰-۳ M of MTSNH in a basic solution of potassium hydroxide ۰.۱ M containing methanol shows that the increase of the scan rate is accompanied by the increase of the intensity of the first oxidation peak, which indicates the acceleration of the studied process. We have also shown that the monomer oxidation reaction is essentially irreversible and controlled by a diffusion process. The protective effect of the film formed on brass has been studied in a ۳% NaCl. The results showed important inhibition efficiency, about ۸۳% for ۱ h of testing time.

Cyclic Voltammetry, Chronoamperometry, Brass alloy, corrosion, Inhibition, MTSNH