A new benzimidazoles derivatives of 8-hydroxyquinoline have been synthesized and its chemical structure was elucidated and confirmed using different spectral methods such as 1H and 13C NMR spectroscopy. The inhibitive action of 5-((2-phenylbenzimidazol-1-yl)-methyl)-quinolin-8-ol (Q-H) against the corrosion of mild steel in 1.0 M hydrochloric acid solution were investigated at different temperatures by a series of known techniques such weight loss and electrochemical measurements. In order to improve inhibition property, the effect of substitution onbenzimidazoles derivatives of 8-hydroxyquinoline towards mild steel corrosion inhibition in hydrochloric acid medium was also studied. It was found that the studied compounds exhibit a very good performance as inhibitors for mild steel corrosion in 1.0 M hydrochloric acid (HCl). Results show that the inhibition efficiency increases with decreasing temperature and increasing concentration of inhibitors.

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MOHAMED RBAA is a PhD. in organic chemistry (Ibn Tofail Univ). YOUNES El KACIMI, is a PhD in electrochemistry and analytical chemistry.Professor BRAHIM LAKHRISSI, is Professor of Organic Chemistry and head of chemistry department. Their careers in chemistry was chiefly devoted to synthesis of novel organic compounds and its practical application.