Author/Authors :
laabaissi, t. université ibn tofail - faculté des sciences - laboratoire des procèdes de séparation, Kenitra, Morocco , rbaa, m. université ibn tofail - faculté des sciences - département de chimie, laboratoire d’agro ressources et génie des procédés, Kénitra, Morocco , ourrak, k. moulay ismail university - faculty of sciences - laboratory of chemistry/biology applied to the environment, Meknès, Morocco , zarrok, h. université ibn tofail - faculté des sciences - laboratoire des procèdes de séparation, Kenitra, Morocco , el faydy, m. université ibn tofail - faculté des sciences - département de chimie, laboratoire d’agro ressources et génie des procédés, Kénitra, Morocco , lakhrissi, b. université ibn tofail - faculté des sciences - département de chimie, laboratoire d’agro ressources et génie des procédés, Kénitra, Morocco , lgaz, h. université ibn tofail - faculté des sciences - laboratoire des procèdes de séparation, Kenitra, Morocco , touir, r. université ibn tofail - faculté des sciences - laboratoire d’ingénierie des matériaux et d’environnement: modélisation et application, Kénitra, Morocco , touir, r. centre régional des métiers de l’education et de la formation (crmef), Rabat, Morocco , warad, i. an-najah national university - department of chemistry, Nablus, Palestine , oudda, h. université ibn tofail - faculté des sciences - laboratoire des procèdes de séparation, Kenitra, Morocco
Abstract :
Two benzodiazepine derivatives namely, 2,2,4,8-tetramethyl-2,3-dihydro-1Hbenzo[ b][1,4]diazepine (THBD), 8-chloro-2,2,4-trimethyl-2,3-dihydro-1H-benzo[b][1,4] diazepine (CTHBD) were examined as a corrosion inhibitor for carbon steel in 1.0 M HCl using electrochemical impedance spectroscopy (EIS) and potentiodunamic polarization (PP). The results showed that both compounds are good inhibitors and their inhibition efficiencies increase with their concentrations to reache 92 % at 5×10^-3 M. The Tafel polarization study revealed that both inhibitors act as a mixed type inhibitors. Furthermore, it has been established that their adsorption follow the Langmuir adsorption isotherm. In addition, the thermodynamic activation parameters for the corrosion reaction were calculated and discussed in relation to the stability of the protective layer. Finally, quantum chemical parameters were calculated using the Density Functional Theory method (DFT) and Monte Carlo simulations. It is found that the correlation between theoretical and experimental results was discussed.
