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2 200 770

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IPC

(21) (22)

Application

2000129814/02, 2000-11-28

(24)

Start date

2000-11-28

(22)

Actual filing date

2000-11-28

(45)

Published

2003-03-20

(72)

Inventor

Chumaevskij V.A.Mjakisheva E.A.Khromova L.M.Kon'Shin A.P.Rogachev V.V.Gerasimov N.A.

(73)

Holder

Zakrytoe Aktsionernoe Obshchestvo

METHOD FOR PHOSPHATATION OF RAPIDLY MOVING BANDS IN CONTINUOUS ASSEMBLIES Russian patent published in 2003 - IPC

Abstract RU 2200770 C2

FIELD: metallurgy. SUBSTANCE: phosphatation of rapidly moving bands in continuous cold-rolled and hot-galvanized steel assemblies is performed at 50- 75 C for 3-6 s in solution containing, g/l: PO3-4

, 8.5-9.2; NO-3
, 6.3-6.5; Zn2+, 4- 4.7; CIO-3
, 2.7-4; and Ni2+, 0.3-0.45; followed by passivation at 40-50 C for 1-3 s in solution containing 0.15-0.25 g/l sodium ethylenediaminetetraacetate and 0.12-0.2 g/l sodium nitrite. EFFECT: considerably increased corrosion resistance and waterproofness of undyed coating. 1 cl, 4 ex

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RU 2 200 770 C2

Authors

Chumaevskij V.A.

Mjakisheva E.A.

Khromova L.M.

Kon'Shin A.P.

Rogachev V.V.

Gerasimov N.A.

Dates

2003-03-20—Published

2000-11-28—Filed

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