METHOD TO PRODUCE OPTICALLY BLACK OXIDE-CERAMIC COATING ON SURFACE OF ALUMINIUM AND ITS ALLOYS Russian patent published in 2012 - IPC C25D11/14 C25D15/00 

Abstract RU 2459890 C1

FIELD: electricity.

SUBSTANCE: method includes microplasmous oxidation in pulse anode-cathode mode with duration of anode impulse packs of 50 ms, cathode impulse packs of 40 ms, pauses between them amounting to 10 ms and ratio of average anode and cathode currents 1.1:0.9 from aqueous solutions of electrolyte containing three solutions, which additionally contain sodium hydroxide, sodium silicate, sodium tetraborate, potassium bichromate, ammonium paramolybdate and tungsten oxide during subsequent oxidation in each of them for 10 min.

EFFECT: increased corrosion resistance, wear resistance and heat resistance of coatings in complex with optical properties.

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RU 2 459 890 C1

Authors

Bespalova Zhanna Ivanovna

Panenko Il'Ja Nikolaevich

Dates

2012-08-27Published

2011-07-22Filed