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Characterisation of a new tripyrazole derivative as inhibitor for the steel corrosion in acid solution

M. Elayyachy (Laboratoire de Chimie des Eaux et Corrosion, Faculté des Sciences, Oujda Morocco and Laboratoire de Chimie Organique‐physique, Faculté des Sciences, Oujda, Morocco)
M. El Kodadi (Laboratoire de Chimie Organique‐physique, Faculté des Sciences, Oujda, Morocco)
B. Hammouti (Laboratoire de Chimie des Eaux et Corrosion, Faculté des Sciences, Oujda, Morocco)
A. Ramdani (Laboratoire de Chimie Organique‐physique, Faculté des Sciences, Oujda, Morocco)
A. Elidrissi (Laboratoire de Chimie Organique‐physique, Faculté des Sciences, Oujda, Morocco)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 1 December 2004

Abstract

The inhibition of corrosion of steel in 1 M HCl solution by newly synthesised pyrazole derivatives has been studied by weight loss and polarisation techniques at 308°K. Its inhibitory power is compared to N,N′‐bis(3,5‐dimethylpyrazol‐1‐yl‐methyl)‐pentanolamine (Bipyr). The results obtained reveal that tripyrazole exhibits a good protection. Inhibition is found to increase with increase in inhibitor concentration. The inhibition behaviour of the compound has been explained on the basis of molecule size and charge density of adsorption active centres. The adsorption phenomenon obeys the Langmuir adsorption isotherm model.

Keywords

Citation

Elayyachy, M., El Kodadi, M., Hammouti, B., Ramdani, A. and Elidrissi, A. (2004), "Characterisation of a new tripyrazole derivative as inhibitor for the steel corrosion in acid solution", Pigment & Resin Technology, Vol. 33 No. 6, pp. 375-379. https://doi.org/10.1108/03699420410568409

Publisher

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Emerald Group Publishing Limited

Copyright © 2004, Emerald Group Publishing Limited