Corrosion behavior of a smart inhibitor in hydrochloric Acid molar: Experimental and theoretical studies

The corrosion inhibition of carbon steel c38 in 1 m hcl solution by a new synthesized compound of imidazopyridine namely (2e)-3-[2-(4-chlorophenyl)imidazo[1,2-a]pyridin-3-yl]-1-(4 methoxy phenyl)prop-2-en-1-onewas studied using tafel polarization,electrochemical impedance spectroscopy (eis) and gravimetric measurements. the experimental results showed that the inhibition efficiency around 93% for 5.10-5m at 303k. the thermodynamic and activation parameters for adsorption process were calculated. this compound was adsorbed according to the langmuir isotherm and it's selected into a mixed-type. in other case a quantum chemical parameters most calculated in corrosion inhibitor have been calculated and discussed. the quantum chemical calculations based on dft methods at b3lyp/6-31g (d,p) level of theory,were performed using gaussian 09 program. © 2017,university of mohammed 1er oujda morocco.