Glushkova M. Technology of silver alloys functional coatings

The subject of this research is chemical reactions in the electrolyte volume and near electrode layer, and electrochemical processes that occur under the electrodeposition of silver alloys. The research objective is the development of electrochemical technology for functional coatings by silver with cobalt, bismuth and molybdenum alloys from citrate-pyrophosphate electrolytes for materials with a high capacity for brazing, corrosion resistance and catalytic activity. Methods of examination are the direct voltammetry, X-ray fluorescence technique, scanning and atomic force microscopy, polarization resistance method. As the result of theoretical and bottom line it has been established the kinetics and mechanism of electrochemical formation of binary and ternary alloys of silver from citrate-pyrophosphate electrolytes; it has been proposed the electrolytes and deposition mode of Ag-Co, Ag-Co-Bi (Mo) coatings with different content, morphology, structure and properties. The novelty is the electrolyte composition, both the pulse electrolysis energetic and time parameters effect on the current efficiency, content and deposition rate to obtain compact shiny and semi shine fine-grained coatings. The realization degree consist of Ag-Co-Bi alloy coatings technology tested for applying solder layers in CHNPP "Turbocontrol", Kharkov and synthesis technology of Ag-Co, Ag-Co-Bi (Mo) functional coatings in KP "HKBD", Kharkov. The branches of this research application are the chemical and industries, the electrochemical production, Research Studies Institutes and а training process.