The aim of this proposal is to use time-resolved NR methods to measure the interfacial composition of bilayers and alloys of Ag and Bi deposited under potentiodynamic conditions from DES media. We will study the nature and composition of the deposited films and the kinetics of interfacial mixing between adjacent layers of Bi & Ag. Alloyed and multi-layered coatings of Ag & Bi are used extensively in anti-wear coatings and bearing surfaces in a range of engineering applications used by strategic industries such as automotive and aerospace as well as functional components of thermoelectric materials. Fabrication of Ag/Bi layers and alloys is usually achieved from electrochemical deposition using aqueous electrolytes. There are limitations of these process often associated with poor current efficiency of deposition, high cost of metal salts and toxicity of some of the metal precursors. The Leicester group has developed new, low cost environmentally sustainable electroplating methods and materials using deep eutectic solvents. DES offer many advantages over aqueous processes including high current efficiency but less is known about the properties of coatings obtained from DES.