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Updated: Sep 18, 2025
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Determining the Chemical Composition of Corrosion Inhibitor/Metal Interfaces with XPS: Minimizing Post Immersion Oxidation
Published on: March 15, 2017
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Structure-Activity Relationship of Ionic Liquids for Acid Corrosion Inhibition
Aymane Omari Alaoui1, Mouslim Messali2, Walid Elfalleh3
1Systems Engineering, Modeling and Analysis Laboratory (LIMAS), Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, BP 1796 Atlas, Fez 30000, Morocco.
International Journal of Molecular Sciences
|June 26, 2025
Summary
Three novel imidazolium-based ionic liquids demonstrated over 90% corrosion inhibition efficiency for mild steel in acidic solutions. These compounds form protective layers, offering excellent corrosion protection.
Area of Science:
- Materials Science
- Electrochemistry
- Computational Chemistry
Background:
- Corrosion of mild steel in acidic media poses significant industrial challenges.
- Ionic liquids (ILs) are emerging as effective corrosion inhibitors due to their unique properties.
Purpose of the Study:
- To synthesize and evaluate novel imidazolium-based ionic liquids (ILs) as corrosion inhibitors for mild steel.
- To elucidate the adsorption mechanism and inhibition efficiency of these ILs in 1 M HCl.
Main Methods:
- Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarization (PDP) for inhibition efficiency.
- Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) for surface analysis.
- Density Functional Theory (DFT) and Monte Carlo (MC) simulations for theoretical insights.
Main Results:
- ILs exhibited >90% corrosion inhibition efficiency, acting as mixed-type inhibitors.
- Adsorption followed Langmuir isotherm, indicating monolayer formation.
- Surface analysis confirmed a protective adsorbed layer, and theoretical studies revealed adsorption mechanisms.
Conclusions:
- Imidazolium-based ILs are highly effective corrosion inhibitors for mild steel in HCl.
- The combination of experimental and theoretical methods provides a comprehensive understanding of the inhibition process.
- These ILs represent promising eco-friendly alternatives for corrosion control.
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