Journal
INORGANIC CHEMISTRY COMMUNICATIONS
Volume 146, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.inoche.2022.110110
Keywords
Ionic liquid; Electrochemical studies; Corrosion inhibition; DFT; Mild steel (MS)
Categories
Funding
- HIMCOSTE [STC/F(8)-2 (RD 20-21)-461]
- DST-SERBTARE [SQUID-1989-GJ-4973]
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Ionic liquid shows great potential in corrosion prevention and this article focuses on the synthesis and application of an imidazole-based ionic liquid as a corrosion inhibitor for mild steel. The inhibitory effect of the ionic liquid increases with concentration and quantum chemical studies are used to locate the redox-active sites on the inhibitor.
Ionic liquids (ILs) are principally investigated for their utilization and applications in electrochemistry and their prospective approach to corrosion prevention has attracted a lot of attention. This article explains the synthesis and utility of a room temperature imidazole-based ionic liquid namely 1-hexyl-3-methylimidazolium tetra-fluoroborate (HMIM.BF4) as an inhibitor of corrosion on the mild steel surface. The HMIM.BF4 showed the cathodic type of steel corrosion inhibition with both chemisorption and physisorption nature obeying Langmuir and Temkin adsorption isotherms. At concentrations greater than 100 ppm, the inhibition efficiency of HMIM. BF4 increases and was found to be 96.27% at 300 ppm. Quantum chemical studies (frontier molecular orbitals and analytical Fukui) have been used to locate the redox-active sites on the inhibitor.
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