FIELD: electrolytic application of coats on metals; metallurgy and mechanical engineering. SUBSTANCE: proposed method includes electrochemical deposition from electrolyte on base of chromic acid containing suspension of colloid cluster particles of diamond on article to be treated; process is performed in electrolyte at varying concentration of colloid cluster particles of diamond; maximum concentration of colloid cluster particles of diamond is formed around article being treated which is rotated around axis. EFFECT: enhanced hardness of coat due to control of cluster particles of diamond by thickness of chromium coat. 2 cl
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