Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 30, 2010
Patent Application Number
10565362
Date Filed
July 28, 2004
Patent Primary Examiner
Patent abstract
The present invention provides a surface treated steel sheet including a steel sheet; a plating layer containing at least one metal selected from the group consisting of zinc and aluminum on a surface of the steel sheet; and a film on the plating layer, the film containing at least one metal selected from the group consisting of Al, Mg, and Zn, a tetravalent vanadium compound, and a phosphoric acid group. This surface treated steel sheet exhibits excellent corrosion resistance and excellent surface appearance without containing hazardous substances, such as hexavalent chromium, in the film.
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