Stock material or miscellaneous articles – Structurally defined web or sheet – Weight per unit area specified
Patent
1996-05-29
1998-03-03
Zimmerman, John J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Weight per unit area specified
428681, 428659, 428457, 428666, 428450, 106 1405, C04B 902, B32B 1504, B32B 1508, B32B 1500
Patent
active
057232105
ABSTRACT:
An organic composite coated steel sheet having excellent chromate dissolution resistance, wet adhesion, and corrosion resistance before and after working. The steel sheet comprises a chromate-silica film on at least one face of a zinc or zinc base alloy plated steel sheet, the silica-added chromate film having about 5 to 500 mg/m.sup.2 in terms of metal Cr content and being formed from a chromate solution containing about 25 to 70 wt % of Cr.sup.+6 based upon total Cr content. A resin coating film is adhered to the chromate-silica film and is formed from an aqueous paint. The aqueous paint includes an aqueous anionic resin and/or an aqueous nonionic resin, a reducing agent, and a water-dispersed silica. The resin coating film is deposited in a dry weight amount of about 0.1 to 3 g/m.sup.2.
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Hamahara Kyoko
Kato Nobuyoshi
Kusakabe Takahiro
Mochizuki Kazuo
Nagai Masanori
DAI Nippon Toryo Co. Ltd.
Kawasaki Steel Corporation
LaVilla Michael
Miller Austin R.
Zimmerman John J.
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