The role of 1-octyl-3-methylimidazolium hexafluorophosphate in anticorrosion coating formula development

Wang, Zeping; Hu, Binjie; Chen, George Zheng

Abstract

A hydrophobic ionic liquid (1-octyl-3-methylimidazolium hexafluorophosphate, C8mimPF6) with a function of inhibiting corrosion was encapsulated at different concentrations in the copolymer of poly (methyl methacrylate) and poly (butyl acrylate) through miniemulsion polymerization. These latexes were coated on steel samples whose corrosion properties were evaluated by electrochemical techniques. It was found that increasing the C8mimPF6 concentration from 0 wt% to 30 wt%, the corrosion inhibition efficiency was remarkably improved from 41% to 89% based on the charge transfer resistance and from 64% to 87% based on the corrosion current density, respectively. The ionic liquid did not attend the reaction during latex preparation but behaved as corrosion inhibitors on the steel surface. Such an anticorrosion effect could be ascribed to the physical adsorption of the C8mim+ cation on the reaction sites and the hydrophobicity enhancement resulting from the hydrophobic PF6− anion.

Citation

Wang, Z., Hu, B., & Chen, G. Z. (2022). The role of 1-octyl-3-methylimidazolium hexafluorophosphate in anticorrosion coating formula development. Journal of Saudi Chemical Society, 26(3), Article 101446. https://doi.org/10.1016/j.jscs.2022.101446

• Journal Article Type: Article
• Acceptance Date: Feb 27, 2022
• Online Publication Date: Mar 14, 2022
• Publication Date: 2022-05
• Deposit Date: Mar 16, 2022
• Publicly Available Date: Mar 16, 2022
• Journal: Journal of Saudi Chemical Society
• Print ISSN: 1319-6103
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 26
• Issue: 3
• Article Number: 101446
• DOI: https://doi.org/10.1016/j.jscs.2022.101446
• Keywords: General Chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/7607262
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S131961032200028X?via%3Dihub