Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

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The inhibition effect of imidazopyridine derivatives on C38 steel in hydrochloric acid solution

Author(s): R. Salim, E. Ech Chihbi, H. Oudda,Y. ELAoufir, F. El-Hajjaji,A. Elaatiaoui, A. Oussaid, B. Hammouti,H. Elmsellem4 and M. Taleb

The inhibition efficiencies of a new derivatives of imidazopyridine namely 7-mèthyl- 2-phenyl imidazo [1,2-
a]pyridne-3-carbaldehyde, 6-chloro-2-(4-fluorophenyl)imidazo[1,2-a]pyridine and 6,8-dibromo-2-phenylimidazo
[1,2-a]pyridine on corrosion of carbon steel in hydrochloric acid solution was investigated by weight loss,
potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The experimental results obtained
by Gravimetric method showed that these compounds are good inhibitors for our steel. It were achieved an
inhibition efficiencies in the range 90.28–95.69% for 10-3M at 298K which decreased with decreasing of the
inhibitors concentrations. There adsorption on the steel surface according to the Langmuir isotherm model and it’s
selected into a mixed-type .The results of gravimetric method are in good agreement with Electrochemical
Impedance Spectroscopy (EIS) methods.


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