Thermodynamic characterization of metal dissolution and inhibitor adsorption processes in mild steel/3,5-bis(3,4-dimethoxyphenyl)-4-amino-1,2,4-triazole/hydrochloric acid system

New 3,5-disubstituted-4-amino-1,2,4-triazole derivative,namely 3,5-bis(3,4-dimethoxyphenyl)-4-amino-1,2,4-triazole (3,4-mat) was synthesised and its inhibitive action against the corrosion of mild steel in 1 m hcl solution was investigated at 308 k. the detailed study of 3,4-mat was been performed using gravimetric measurements and polarisation curves method. results show that 3,4-mat is a good inhibitor and its inhibition efficiency reaches 98 % at·10-3 m. tafel polarisation study revealed that 3,4-mat acts as a mixed type inhibitor. the inhibitor adsorption process in mild steel/3,4-mat/hydrochloric acid system was studied at different temperatures (308-323 k) by means of weight loss measurements. the adsorption of 3,4-mat on steel surface obeyed langmuir's adsorption isotherm. the kinetic and thermodynamic parameters for mild steel corrosion and inhibitor adsorption,respectively,were determined and discussed.