Experimental and theoretical study on the effectiveness of ionic liquids as corrosion inhibitors

Electrochemical Behavior of CoO/Ag2O/TiO2 Ceramic and Composite Coated Selective Laser Manufactured 316L Stainless Steel

“…Also, it is highly possible that the electrolyte will leak into the coating film and the corrosion will increase. The other factor of corrosion resistance was thought to be the electronegativity of the element atoms forming the ceramic structure on the surface [52][53][54]. It was known that as electronegativity between atoms increases, the ionic bonding increases.…”

Mini-review on Recent Advances in the Application of Surface-Active Ionic Liquids: Petroleum Industry Perspective

“…Murillo-Hernandez et al investigated asphaltene aggregation in ILs and discovered that when ILs contain a complex anion, such as a pyridinium ring, they work better as inhibitors or stabilisers. 125 Boukherissa et al studied two ILs, 1-propylboronicacid-3alkylimidazolium and 1-propenyl-3-alkylimidazolium bromides, and concluded that the presence of a boronic acid moiety enhances interactions between asphaltenes and ILs to reduce asphaltene aggregation. 25 A recent study conducted by Zheng et al demonstrated the dissolution potential of a phosphonium-based IL and reported an asphaltene to IL ratio of 1:200.…”

“…The IL with the Br + anion showed an accelerated corrosion rate in comparison to that with OH − , which may be because of increased transfer of electrons from the surface to the IL molecule, thereby enhancing the corrosion process. 125…”

“…The steric stabilization of IL–asphaltene complexes increases the inhibition effect of asphaltene when the cation alkyl chain length is eight or longer. Murillo-Hernandez et al investigated asphaltene aggregation in ILs and discovered that when ILs contain a complex anion, such as a pyridinium ring, they work better as inhibitors or stabilisers . Boukherissa et al studied two ILs, 1-propylboronicacid-3-alkylimidazolium and 1-propenyl-3-alkylimidazolium bromides, and concluded that the presence of a boronic acid moiety enhances interactions between asphaltenes and ILs to reduce asphaltene aggregation .…”

“…It was observed that the anion moiety also plays an important role in the corrosion rate, which may be because of the difference in the electronegativity of the counter ions. The IL with the Br + anion showed an accelerated corrosion rate in comparison to that with OH – , which may be because of increased transfer of electrons from the surface to the IL molecule, thereby enhancing the corrosion process …”