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

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