Inhibition of mild steel corrosion in hydrochloric using three different 1,2,4-triazole Schiff's bases: A comparative study of electrochemical, theoretical and spectroscopic results

The inhibition properties of three triazole Schiff's bases namely, (4-(4-hydroxybenzylideneamino)-4H-1,2,4-triazole-3,5-diyl)dimethanol (HATD), (4-(4-methoxybenzylideneamino)-4H-1,2,4-triazole-3,5-diyl)dimethanol (MATD) and (4-(3,4-dimethoxybenzylideneamino)-4H-1,2,4-triazole-3,5-diyl)dimethanol (DMATD) for mild steel corrosion in hydrochloric acid have been investigated by weight loss, electrochemical, spectroscopic and computational studies. The results showed that synthesized compounds act as effective inhibitors for mild steel in hydrochloric acid. Inhibition efficiency of these inhibitors increases with inhibitor concentration, but decreases with temperature and acid concentration. The inhibition efficiencies obtained from experimental studies are in good agreement with theoretically calculated values and results of spectroscopic studies.