Ionic liquids for pitting corrosion inhibition of aluminum alloy in saline-alkaline solution

Document Type : Original Article

Authors

1 Department of Chemistry, Faculty of Science, Mansoura University, Mansoura

2 Egyptian Petroleum Research Institute (EPRI), Nasr City

3 Department of Chemistry, Faculty of Science, New Valley University, El-Kharja

Abstract

Under different experimental settings, three liquids based on imidazolium were studied as green inhibitors for pitting corrosion of aluminum alloy (AA6061) in a saline-alkaline solution (1.0 M NaCl + 0.1M Na2CO3). This research uses cyclic polarization (CP), ptentiodynamic polarization (PP), AC Impedance spectroscopy (EIS), and surface morphology. The inclusion of ionic liquids clearly altered the pitting potential to a more positive value. The size of both the capacitive and inductive loops in the EIS graphs expanded dramatically as the concentration of ionic liquids increased. Ionic liquids delay aluminum corrosion by adsorbing the compound to the alloy surface, according to SEM, AFM, XPS studies.

Keywords

Mansoura Journal of Chemistry
Volume 55, Issue 1
February 2022
Pages 9-16

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