•  
  •  
 

Article Type

Research Paper

Corresponding Author

Ashraf M Ashmawy

Abstract

Aim/Objectives/Background: In this study, we aimed to synthesize and evaluate the corrosion inhibition capacity of gemini ionic liquids (ILs) on carbon steel in a 1.0 molar hydrochloric acid solution. Both chemical and electrochemical methods were utilized to investigate their inhibitive properties. Molecular characterization was performed using Fourier-transform infrared and 1H-NMR techniques.

Methods: The ILs were synthesized, and their inhibitory characteristics were assessed through chemical and electrochemical analyses. Molecular constitution was confirmed through spectroscopic techniques. Various concentrations of ILs were examined to understand their inhibitory effectiveness, and Nyquist plots were analyzed to establish a correlation between IL concentration and inhibitory efficiency.

Results: The experiments revealed that the newly synthesized ILs effectively inhibited corrosion, even at low concentrations, with an overall efficiency ranging from 97 to 97.5%. Molecular characterization confirmed the structural integrity of the ILs. The organic cationic component significantly influenced adsorption strength, impacting interfacial structure. ILs incorporating the (-CH3) functional group exhibited superior effectiveness compared to those with the (-Cl) group. Additionally, inhibitory effectiveness increased with rising IL concentrations, as supported by Nyquist plot analysis.

Conclusions: The study concludes that the synthesized novel ILs demonstrate excellent corrosion inhibition properties on carbon steel in 1.0 M HCl. The organic cationic composition and concentration significantly influence their inhibitory effectiveness. Understanding these relationships provides valuable insights for tailoring ILs as effective corrosion inhibitors in acidic environments.

Keywords

adsorption, carbon steel, corrosion inhibitor, electrochemical impedance spectroscopy, ionic liquids

Download

Share

COinS