Multiple coated composite steel strip

Details Multiple coated composite steel strip Multiple coated composite steel strip

1988-05-12

1990-01-02

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428626, 428632, 428667, 428680, B32B 1504

Patent

active

048912735

ABSTRACT:
A multiple coated composite steel strip having an excellent corrosion (rust) resistance, weldability and paint adhesion, and thus useful for car bodies, comprises a steel strip substrate, a first metal coating layer, a second chlorate coating layer formed by an electrolytic chromate treatment method, containing 40 to 120 mg/m.sup.2 of chromium and having a content of Cr.sub.2 O.sub.3 of 45% by weight or more, and a third resinous coating layer comprising a homopolymer or copolymer of acrylic acid, methacrylic acid, acrylic acid ester or methacrylic acid ester and 15% to 40% of colloidal silica particles having a very small size of 1 to 12 m .mu.m.

REFERENCES:
patent: 4411964 (1983-10-01), Hara et al.
patent: 4659394 (1987-04-01), Hara et al.
patent: 4775600 (1988-10-01), Adaniya et al.
Chemical Abstracts, vol. 100, No. 10, p. 248, Col. 2, Abstract No. 72335u, Mar. 5, 1984.

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