ABSTRACT
“High entropy alloy (HEA)” is the name given to a class of material that is solid solutions of five or more component atoms in equiatomic or near-equiatomic ratios. Recently, electrodeposition of high entropy alloy coatings has gained importance due to their high corrosion and oxidation resistance properties. Electrodeposition of high entropy alloy coatings with uniform microstructure throughout the coating thickness is, however, a non-trivial task, due to the complexity of the electrolyte bath and need for precise deposition conditions to uniformly co-deposit elements with widely different reduction potentials. This chapter describes the work done by the authors on the electrodeposition of CrFeCoNiCu, AlCrFeCoNiCu, and MnCrFeCoNi high entropy alloy coating systems. Optimum parameters and constituents of the electrolyte bath to obtain the high entropy alloy coatings, microstructure of the coatings, and their corrosion properties are discussed in detail.
