Multiple coated composite steel strip

Details Multiple coated composite steel strip Multiple coated composite steel strip

B - Operations, Transporting

32

B

204/22.5

B32B 15/18 (2006.01) B32B 15/08 (2006.01) B32B 27/06 (2006.01) C25D 11/38 (2006.01)

Patent

CA 1324975

- 46 - MULTIPLE COATED COMPOSITE STEEL STRIP ABSTRACT OF THE DISCLOSURE 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/m2 of chromium and having a content of Cr2O3 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 meth- acrylic acid ester and 15% to 40% of colloidal silica particles having a very small size of 1 to 12 m µm.

567040

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