Choline chloride based ionic liquids for the electrodeposition of metals and alloys

Recently it has been shown the possibility of formation of ionic liquids from eutectic mixtures of quaternary ammonium salt such as choline chloride (2-hidroxy-ethyl-trimethyl ammonium chloride) with a hydrogen bond donor species such as amides, glycols or carboxylic acids. These media have been further used to electrodeposit a large range of metals and alloys including Zn and Zn alloys, Cr, Sn, Cu and Ag. In this work, we report about the electrodeposition of metals, e.g. nickel and alloys, from choline chloride based electrolytes. To evaluate the resistance against corrosion, several accelerated corrosion tests have been performed and results are discussed.