The goal of this project is to build knowledge about the speciation of chromium (III) in the electrodeposition of chromium layers from ionic liquids, with a view to developing an alternative, sustainable method for electrolytic deposition applications. Concrete lenses targets are set: - the determination of the chromium environment in the model medium, of a choline chloride / CrC13.6H20 ionic liquid by using a literature study, examination of some specific compounds and the synthesis and structural characterization of a number of model compounds - one in-depth characterization of the in-situ chromium (III) speciation at the substrate interface during the electrodeposition. - determining the relationship between the chromium (III) speciation and the morphology of the deposited layers for the purpose of the improvement of the layer morphology - the scaling up of the newly developed technology, on the basis of ionic liquids and the design of a pilot line.