Effect of Azo Compounds on the Structure and Mechanical Properties of a Copper Coating Electrodeposited on Oxidized Aluminum Alloys

Abstract

A new method for the electrodeposition of copper on oxidized aluminum alloys to form electrolytic coatings exhibiting high performance properties has been discussed. The effect of an azo compound-methyl red (MR)-additive on the structure and physicomechanical properties of the copper coatings formed on oxidized aluminum has been studied. Samples of aluminum alloys AD1M and AMg6BM have been subjected to an anodic treatment under identical conditions in two oxidation electrolytes of different compositions. Copper has been electrodeposited on oxidized aluminum alloy samples using a standard copper plating electrolyte. Comparison with a copper plating electrolyte of an identical composition with an MR azo dye additive has been conducted. The microstructure and adhesive properties of the copper coating formed on oxidized aluminum alloys have been studied. The relationship between the physicomechanical properties of the copper coating (microhardness, open porosity, adhesion) and the action of an azo dye additive in the copper plating electrolyte has been studied. The use of this technology will make it possible not only to increase the reliability and durability of machine parts and mechanisms but also to restore old parts and mechanisms.

Antimicrobial properties dependence on the composition and architecture of copper-alumina coatings prepared by plasma electrolytic oxidation (PEO)

“…However, since the area of copper electrodeposits correspond to only 0.2 % of the PEO surface, the general content of copper over sample B surface still can be considered low. According to Belov et al [36], the reduction of copper ions over an anodized Al surface occurs locally, accompanied by a high cathodic polarization, as observed in our sample. The formation of a copper layer with high coverage demands a high cathodic current density or a longer electroplating time.…”