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Inhibition effect of E and Z conformations of 2-pyridinealdazine on mild steel corrosion in phosphoric acid

Mohammed Elalaoui Belghiti (Laboratory of Applied Chemistry and Environment (URAC 18), University Mohammed Premier, Oujda, Morocco)
Ayssar Nahlé (Department of Chemistry, College of Sciences, University of Sharjah, Sharjah, United Arab Emirates)
Abdeslam Ansari (Laboratory of Natural Substances and Synthesis and Molecular Dynamics, University My Ismail, Errachidia, Morocco)
Yasser Karzazi (Laboratory of Applied Chemistry and Environment (URAC 18), University Mohammed Premier, Oujda, Morocco and National School of Engineering and Applied Sciences, University Mohammed Premier, Al Hoceima, Morocco)
S. Tighadouini (Laboratory of Applied Chemistry and Environment (URAC 18), University Mohammed Premier, Oujda, Morocco)
Yassir El Ouadi (Laboratory of Applied Chemistry and Environment (URAC 18), University Mohammed Premier, Oujda, Morocco)
A. Dafali (Laboratory of Applied Chemistry and Environment (URAC 18), University Mohammed Premier, Oujda, Morocco)
Belkheir Hammouti (Laboratory of Applied Chemistry and Environment (URAC 18), University Mohammed Premier, Oujda, Morocco)
Smaail Radi (Laboratory of Applied Chemistry and Environment (URAC 18), University Mohammed Premier, Oujda, Morocco)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 3 January 2017

124

Abstract

Purpose

This paper aims to study the inhibition effect of 2-pyridinealdazine on the corrosion of mild steel in an acidic medium. The inhibition effect was studied using weight loss, electrochemical impedance spectroscopy, and Tafel polarization measurements.

Design/methodology/approach

Weight loss measurements, potentiodynamic tests, electrochemical impedance spectroscopy, X-ray diffraction and spectral and conformational isomers analysis of A (E-PAA) and B (Z-PAA) were performed were investigated.

Findings

2-pyridinealdazine (PAA) acts as a good inhibitor for the corrosion of steel in 2.0 M H3PO4. The inhibition efficiency increases with an increase in inhibitor concentration but decreases with an increase in temperature.

Originality/value

This paper is intended to be added to the family of azines which are highly efficient inhibitors and can be used in the area of corrosion prevention and control.

Keywords

Citation

Belghiti, M.E., Nahlé, A., Ansari, A., Karzazi, Y., Tighadouini, S., El Ouadi, Y., Dafali, A., Hammouti, B. and Radi, S. (2017), "Inhibition effect of E and Z conformations of 2-pyridinealdazine on mild steel corrosion in phosphoric acid", Anti-Corrosion Methods and Materials, Vol. 64 No. 1, pp. 23-35. https://doi.org/10.1108/ACMM-11-2015-1594

Publisher

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Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited

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