A new insight into corrosion inhibition process of mild steel in sulfuric acid medium: a combined experimental and theoretical study
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 2 September 2019
Issue publication date: 17 October 2019
Abstract
Purpose
This study aims to investigate the inhibition effect of a newly synthesized1,2,3-triazole containing a carbohydrate and imidazole substituents, namely, 1-((1-((2,2,7,7-tetramethyltetrahydro-5H-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-5-yl)methyl)-1H-1,2,3-triazol-4-yl)methyl)-1H-benzo[d]imidazole (TTB) on the corrosion of mild steel in aerated 1 M H2SO4.
Design/methodology/approach
The authors have used weight loss measurement, potentiodynamic polarization, electrochemical impedance spectroscopy, FT-IR studies, scanning electron microscopy analysis and energy dispersive X-ray (EDX) spectroscopy techniques.
Findings
It is found that, in the working range of 298-328 K, the inhibition efficiency of TTB increases with increasing concentration to attain the highest value (92 per cent) at 2.5 × 10−3 M. Both chemisorption and physisorption of TTB take place on the mild steel, resulting in the formation of an inhibiting film. Computational methods point to the imidazole and phenyl ring as the main structural parts responsible of adsorption by electron-donating to the steel surface, while the triazol ring is responsible for the electron accepting. Such strong donating–accepting interactions lead to higher inhibition efficiency of TTB in the aqueous working system.
Originality/value
This work is original with the aim of finding new acid corrosion inhibitors.
Keywords
Citation
Boutouil, A., Laamari, M.R., Elazhary, I., Anane, H., Ben Tama, A. and Stiriba, S.-E. (2019), "A new insight into corrosion inhibition process of mild steel in sulfuric acid medium: a combined experimental and theoretical study", Anti-Corrosion Methods and Materials, Vol. 66 No. 6, pp. 835-852. https://doi.org/10.1108/ACMM-01-2019-2055
Publisher
:Emerald Publishing Limited
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