CAJ | 학술논문

Solubilities and conduetivities of anliydrons AlCl3 in six kinds of ionic liquids (ILs) were measured. Among the sixkinds of ILs [bmim]Cl, [bmim]Br, [bmim]BF4, [bmim]PF6, [emim][EtSO4] and [bmim][HSO4], anhydrous AlCl3 could bedissolved in the first five kinds but was hardly dissolved in [bmim][HSO4]. The results showed that the nominal solubilities ofAlCl3 in ILs increased in the order of [bmim][HSO4] < [bmim]PF6 < [emim][EtSO4] <[bmim]BF4<[bmim]Cl<[bmim]Br.Conduetivities of the AlCl3/ILs systems depended apparently on the nominal molar ratio of AlCl3 to ILs. The conduetivities ofAlCl3/[bmim]Cl, AlCl3/[bmim]Br and AlCl3/[bmim]PF6 systems had a similar tendency as a fimetion of the nominal molarratio, that is, as the molar ratio was increased, conductivities increased first and then decreased, with the maximumconductivity obtained at approximately 0.9:1, 1.0:1 and 0.5:1, respectively. Conduetivities of the AlCl3/[bmim]BF4 exhibited adentate change and decreased with the molar ratio of AlCl3 to [bmim]BF4 increasing in general. With the increasing of theanhydrous AlCl3 amount in [emim][EtSO4], conductivity of AlCl3/[emim][EtSO4] monotonically decreased. AlCl3/[bmim]Clsystem was chosen as the electrolyte for the electrodeposition of Al. Preliminary experimental results showed that dense,adherent and homogeneous Al coatings could be electrodeposited on stainless steel by means of constant potential techniqueand the surface coverage was quite satisfactory.