Engineering novel material structures has continually been pursued to further advance modern technologies. These advancements often rely on novel processing technologies. Although many processing parameters have been thoroughly examined in the field of composition coatings, the formation processes are an exception. In this work, we examine the unique microstructures of composite electrolytic coatings, obtaining from electrolytes-suspension which contains nano-size particles of SiO2 and carbon. Metallographic researches were carried out for an establishing the reasons of essentially differences in corrosion resistance of nano- nano-composition electrolytic coatings received at various electroplating temperatures. The results of corrosion investigation show, that the best corrosion resistance has nano-composition electrolytic coatings received at 333 K temperature. This novel electro-deposition technology has the potential to open new areas of research such as obtaining materials with desired functional properties.