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Investigation of inhibition by 6-bromo-3-nitroso-2-phenylimidazol[1,2-α]pyridine of the corrosion of C38 steel in 1 M HCl

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Abstract

Inhibition of the corrosion of C38 steel in 1 M HCl by 6-bromo-3-nitroso-2-phenylimidazol[1,2-α]pyridine (BNPP) has been studied by use of electrochemical impedance spectroscopy and potentiodynamic polarization. BNPP inhibited the corrosion of C38 steel in 1 M HCl solution. Polarization curves show that BNPP acts as mixed-type inhibitor. Changes in impedance (charge-transfer resistance, Rt, and double layer capacitance, Cdl) were indicative of adsorption of BNPP on the metal surface, leading to formation of a protective film. The extent of surface coverage by the inhibitor was determined by measurement of weight loss; it was found that adsorption of this inhibitor on the C38 steel surface obeys the Langmuir adsorption isotherm. The effect of temperature on the corrosion behaviour was studied in the range 289–328 K. The results showed that the rate of corrosion of C38 steel increased with increasing temperature both in the presence of 10−3 M BNPP and in its absence. Activation energies in the presence and absence of BNPP were obtained by measuring the temperature dependence of charge-transfer resistance.

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Authors and Affiliations

  1. Laboratory of Environmental Engineering and Biotechnology, ENSA, Université Ibn Zohr, PO Box 1136, 80000, Agadir, Morocco

    Ali Anejjar & Rachid Salghi

  2. LCAE-URAC 18, Faculty of Science, University of Mohammed Premier, Po Box 717, 60000, Oujda, Morocco

    Abdelkader Zarrouk, Belkheir Hammouti, Nour-Eddine Benchat & Rafik Saddik

  3. Laboratory Separation Processes, Faculty of Science, University Ibn Tofail, PO Box 242, Kenitra, Morocco

    Hassan Zarrok

  4. Department of Biology, Faculty of Sciences and Technology, Saïda University, Saïda, Algeria

    Omar Benali

  5. Petrochemical Research Chair, Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia

    Salem Selim Al-Deyab

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  1. Ali Anejjar
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  2. Rachid Salghi
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Correspondence to Rachid Salghi.

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Anejjar, A., Salghi, R., Zarrouk, A. et al. Investigation of inhibition by 6-bromo-3-nitroso-2-phenylimidazol[1,2-α]pyridine of the corrosion of C38 steel in 1 M HCl. Res Chem Intermed 41, 913–925 (2015). https://doi.org/10.1007/s11164-013-1244-7

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