Catalytic activity of FeCrNiWMoCoCB metallic glass (MG) coatings deposited on steel 1035 was studied in decomposition of the model solution of methylene blue. Five samples with different compositions and predominantly amorphous structure were synthesized by depositing MG coatings using the electrospark treatment in the crystalline alloy granule medium. The Ra criterion characterizing the coatings roughness was 9 to 14 mm that indicated the considerable area of interaction between MG and methylene blue. The presence of nickel and cobalt but not tungsten and molybdenum in the metallic glass favored an increase in the catalytic activity of the coatings. The best catalytic properties were inherent in the coatings consisted of Fe33Cr8Ni8W8Mo8Co8C16B11which provided a decrease in the activation energy of self-decomposition of methylene blue to one eighth in the presence of hydrogen peroxide. It was shown that the efficiency of this catalytic system could be increased by a factor of 3 upon etching in 30 % HNO3for 380 s due to an increase in the porosity and in the specific surface area of the coating. The suggested approach makes it possible to decrease considerably the prime cost of the catalytic units of the reactor owing to application of one-stage supporting of MG coating on the metals.
