For the first time thick (~ 8 μm) Cu/Co-W multilayered coatings with individual layers ranging from 5 to 200 nm were electrodeposited from a single bath. The content of tungsten in rich-in Co-W layers was controlled by varying current densities in a citrate-borate bath. Continuous Multi-Cycle (CMC) nanoindentation technique was used to analyze mechanical properties of those deposits. Optical examination of the indented zone revealed the absence of cracks inside and outside the indentation area in the interval of the normal loads used. The hardness of Cu/Co-W multilayers varied with the bi-layer period and the electrodeposition parameters. The Cu/Co-W multilayers showed an increased hardness compared to that of Co-W coatings electrodeposited under the same conditions.

Electrodeposits of Со-Мо-Р alloys have been electrodeposited at direct current ranged 1 to 15 А/dm2 and pH 4−6, from a citrate electrolyte with ammonium hypophosphite at different temperature 28 oС and 60 oС. In order to evaluate interrelation of structure, morphology, and properties of the obtained electrodeposits have been investigated by SEM, EDX, wear resistance and microhardness. It is shown, that at increasing of electrolyte pH from 4 to 6 phosphorus content in electrodeposits decrease and molybdenum content growing. It is shown correlation between microhardness, wear resistance and content of phosphorous in coatings.