Journal
CORROSION SCIENCE
Volume 108, Issue -, Pages 23-35Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2016.02.036
Keywords
Alloy; EIS; Modelling studies; Acid corrosion
Funding
- CONACyT
- UAEH-PAI Projects
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The corrosion inhibition efficiency of carbon steel was evaluated using fifteen molecules derivated from imidazole and benzimidazole in 1.0 M HCl. The inhibition efficiency varies from 15.6 to 89.4%, depending on the chemical and the electronic structure of the compounds. The structural properties of the molecules under study were determined by density functional theory. Experimental and theoretical parameters were used to construct a model to predict the inhibition observed. The proposed model shows that inhibition efficiency is related to the molecule volume, charge, electronegativity, and aromaticity. The model is successfully used to predict the corrosion behavior of two additional molecules. (C) 2016 Elsevier Ltd. All rights reserved.
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