COMPOSITION FOR CLEANING OF METALLIC SURFACES FROM COMPLEX NITRIDE COATINGS Russian patent published in 2000 - IPC

Abstract RU 2151821 C1

FIELD: treatment of metallic surfaces during repair of engines, more specifically compressor vanes made of titanium alloys and steels. SUBSTANCE: in order to clean complex nitride coatings, aqueous solution comprises, g/l: nitric acid, 28.0-32.0; potassium tetrafluoroborate, 26.0-30.0; and sodium polyphosphate, 0,5•10^-3-1,5•10^-3. Complete cleaning of surfaces of components is carried out at room temperature for 1 hour. EFFECT: improved properties of the composition. 1 ex, 1 tbl

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RU 2 151 821 C1

Authors

Paderova L.V.

Zaks E.V.

Paderov A.N.

Khabibulin N.R.

Dates

2000-06-27—Published

1999-01-05—Filed