MANUFACTURING TECHNIQUE OF HIGH-BUILD WEAR-RESISTANT COATING BY MICROARC OXIDATION Russian patent published in 2015 - IPC C25D11/02 

FIELD: electricity.

SUBSTANCE: manufacturing technique of high-build wear-resistant coating in microarc oxidation mode includes installation of a part in electrolyte at a current-conducting holder coated by insulating material, generation of operating voltage between a part and electrolyte, increase of voltage till microarc discharge occurs at the surface of a part. Aqueous solution of potassium hydroxide and soluble glass is used as electrolyte at concentration of each substance of 2.5 g/l, microarc oxidation process is carried during 2.5-3.5 hours at current of I=4.5-12 A, ratio of anodic and cathodic current is 1:1 and voltage at anode is U_a=200-415 V.

EFFECT: invention allows manufacturing high-build wear-resistant coating by microarc oxidation with increased values of microhardness, reducing labour intensity and energy consumption due to optimal concentration of substances included into the electrolyte composition and optimal parameters of microarc oxidation process.