METHOD OF PRODUCING OF PROTECTIVE COATINGS ON ALUMINUM AND ITS ALLOYS Russian patent published in 1998 - IPC

Abstract RU 2112087 C1

FIELD: protection of articles from abrasive wear and high-temperature corrosion; applicable in aviation, mechanical engineering, automotive and other industries. SUBSTANCE: the offered method is realized by microarc oxidation with voltage of coating formation of 160-170 V and current density of 0.9-1.2 A/sq.cm in electrolyte based on sodium hexafluoroaluminate with electrolyte pH 9.8-10.2. Electrolyte contains the following components, g/l: sodium hexafluoroaluminate 2.0-12.0; potassium tartrate 5.0-10.0; sodium fluoride 0.5-2.0; potassium hydroxide 0.5-0.6. Formation in composition of coating of glass phase based on aluminum oxide modified with fluorine allows production of protective anticorrosive coatings possessing high microhardness and heat resistance. EFFECT: higher efficiency. 2 tbl

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RU 2 112 087 C1

Authors

Gnedenkov S.V.

Khrisanfova O.A.

Kovrjanov A.N.

Sinebrjukhov S.L.

Zavidnaja A.G.

Lysenko L.V.

Gordienko P.S.

Dates

1998-05-27Published

1996-09-23Filed