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- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received November 25, 2023
Accepted March 28, 2024
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Theoretically and Experimentally Exploring the Inhibition Eff ect of Imidazole Sulfonic Acid Derivatives with Multiple Adsorption Sites in 1.0 mol/L HCl
Abstract
Corrosion inhibitors have played a huge role in daily life and industrial production. Imidazole and sulfonic acid groups have
high corrosion inhibition capabilities. To further improve their excellent corrosion inhibition performance, two new sulfonic
acid azole corrosion inhibitors (YM and ZM) were synthesized and the eff ect of carbon chain length on the imidazole sulfonic
acid corrosion inhibitor was studied. The weight loss and electrochemical results indicated that the corrosion inhibition
effi ciency signifi cantly increased with the increase of YM and ZM concentration. At 1.0 g/L of ZM, the corrosion inhibition
effi ciency of weight loss, EIS and Tafel were 95.02%, 86.61%, and 98.49%, respectively. Electrochemistry further indicated
that ZM and YM could form a stable protective fi lm on the surface of Q235 and increased the charge transfer resistance,
thereby improving their corrosion inhibition effi ciency and belong to cathodic corrosion inhibitors. SEM–EDS, FT-IR, and
XPS confi rmed that YM and ZM could eff ectively adsorb on the surface of Q235, and further demonstrated theories through
density functional theory and molecular dynamics simulation.
