First developed and studied composite materials on a metal substrate (matrix) obtained by the electrodeposition of aerospace industry nickel waste of the elec-trolytes-suspensions based sulfate, chloride, acetate and methanesulfonateon containing ultrafine powders kaolin and bentonite clays. It was established that by using ultrafine powders on electrolyte suspensions, metal matrix composites (MMCs) reinforced by ultrafine uniform-sized elements are produced. New MMCs from electrolyte suspensions with addition of nanosize powders of kaolin and bentonite were obtained as a result of the conducted experiments and had been thoroughly studied. The effect of kaolin and bentonite nanosize powder additive concentration on substrate porosity and its electrochemical properties (corrosion resistance, electrochemical activity) had been established. It was shown that porosity, corrosion resistance and electrochemical activity of MMC are determined by the grain size of ultrafine elements and their concentration in the electrolyte suspension. Consumption of organic additives for the electrolytes that provide the required surface quality of MMC was determined and optimized. © 2020, Univelt Inc. All rights reserved.