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Effect of some tripodal bipyrazolic compounds on C38 steel corrosion in hydrochloric acid solution

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Abstract

The corrosion inhibition of C38 steel in molar HCl by N,N-bis[2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl]buthylamine (P1) and 5-{N,N-bis[2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl] amino} pentanol (P2) has been investigated at 308 K using electrochemical and weight loss measurements. Measurements show that these compounds act as good inhibitors without changing the mechanism of the corrosion process. Moreover, the inhibiting efficiency increases with the increase in concentration of the studied inhibitors. Compound P2 showed better protection properties even at relatively higher temperatures when compared to P1. The associated activation corrosion and free adsorption energies have been determined. P1 and P2 are adsorbed on the C38 steel surface according to a Langmuir isotherm adsorption model.

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Authors and Affiliations

  1. Laboratoire d’Analyses Physico-chimiques et Matériaux Catalytiques pour l’Environnement, Faculté des Sciences Dhar El Mahraz, BP 1796, 30000, Atlas, Fès, Morocco

    B. Zerga, M. Sfaira, M. Taleb & Z. Rais

  2. LCOMPN-URAC25, Faculté des Sciences, Université Mohammed Premier, BP 717, 60000, Oujda, Morocco

    A. Attayibat & S. Radi

  3. LCAE-URAC18, Faculté des Sciences, Université Mohammed Premier, BP 717, 60000, Oujda, Morocco

    B. Hammouti

  4. Laboratoire d’Electrochimie, Corrosion et Environnement, Faculté des Sciences, BP 133, 14000, Kénitra, Morocco

    M. Ebn Touhami

Authors
  1. B. Zerga
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  2. A. Attayibat
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  3. M. Sfaira
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  4. M. Taleb
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  5. B. Hammouti
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  6. M. Ebn Touhami
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  7. S. Radi
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  8. Z. Rais
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Corresponding authors

Correspondence to M. Sfaira or B. Hammouti.

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Zerga, B., Attayibat, A., Sfaira, M. et al. Effect of some tripodal bipyrazolic compounds on C38 steel corrosion in hydrochloric acid solution. J Appl Electrochem 40, 1575–1582 (2010). https://doi.org/10.1007/s10800-010-0164-0

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  • DOI: https://doi.org/10.1007/s10800-010-0164-0

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