METHOD OF ELECTROCHEMICAL BLACKENING OF STEEL Russian patent published in 2015 - IPC C25D5/04 C25D9/10 C25D11/34 

FIELD: metallurgy.

SUBSTANCE: method allows to perform blackening both in stationary bathtubs, and using the electric brushing method. For electrodeposition of such coatings the electrolyte containing the following components, g/l is offered: chloride sodium 250-300, sugar 100-200, synthanol DS-10 1-3. Electrodeposition of black coating is performed using alternating electric current. Current density in the stationary galvanic bathtub is 0.6-1.0 A/cm², and when using the method of electric brushing is 3-6 A/cm². For electric brushing the electrode tool from chrome-plated steel with Crimplene fabric and with a cavity for electrolyte is used.

EFFECT: increase of speed of processing, increase of productivity of the equipment, increase of corrosion resistance of steel, possibility of processing of products and details of various sizes when using environmentally friendly substances.

2 cl, 1 dwg, 4 ex