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2 090 650

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C1

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IPC

(21) (22)

Application

95120627/02, 1995-12-09

(22)

Actual filing date

1995-12-09

(45)

Published

1997-09-20

(72)

Inventor

Skvortsova L.B.Nabatova E.A.Chumaevskij V.A.

(73)

Holder

Aktsionernoe Obshchestvo Zakrytogo Tipa

SOLUTION FOR PHOSPHATING THE METALLIC SURFACE Russian patent published in 1997 - IPC

Abstract RU 2090650 C1

FIELD: chemical treatment of metal surfaces, particularly, for applying of phosphate layer under paint and varnish coatings which may be used in machine building industry, power machinery constructions, electro- and radio engineering. SUBSTANCE: solution for phosphating comprises calcium, zinc, phosphate ions, oxidant an waste solution of tanning of leather. Its composition, g/l is as follows: ZnO (as calculated for Zn2+), 4.0-5.8; CaCO3 or Ca(NO3)2 (as calculated for Ca2+), 3.8-6.0; H3PO4 (as calculated for P2O5), 8.0-13.0; HNO3 (as calculated for NO3), 18.0-21.0; waste solution of tanning of leather, 0.1-0.4; water, the balance up to 1 l. EFFECT: improved quality. 2 cl, 1 tbl

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RU 2 090 650 C1

Authors

Skvortsova L.B.

Nabatova E.A.

Chumaevskij V.A.

Dates

1997-09-20—Published

1995-12-09—Filed

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