The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 1996
Filed:
Oct. 12, 1993
Shigeko Sujita, Chiba, JP;
Nobuyuki Morito, Chiba, JP;
Kawasaki Steel Corporation, , JP;
Abstract
An organic composite coated steel strip having well-balanced corrosion resistance, coating properties including adaptability to electrophoretic coating and water resistant secondary coating adherence, and spot weldability is provided. The organic composite coated strip comprises a zinc or zinc base alloy plated steel substrate; a chromate later on the substrate containing up to 70% by weight of Cr.sup.6+ based on the total chromium quantity, the chromate layer being coated in a weight of 5 to 500 mg/m.sup.2 in terms of elemental chromium; and an organic composite layer on the chromate layer mainly comprising silica and an organic high molecular weight resin. In the organic composite coated steel strip, (a) silica has an average primary particle diameter of 5 to 30 nm; (b) silica is agglomerated into agglomerates of an average thickness of 0.2 to 2 .mu.m and an average apparent diameter of 5 to 300 .mu.m; and (c) the organic composite layer has been coated to a dry weight of 0.1 to 3 g/m.sup.2. The organic composite coated steel strip of the invention has various uses including automobile bodies.