Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shigeru Umino0
Takeshi Sakuma0
Yuuzo Ootuka0
Chiyoko Tada0
Hiroki Nakamaru0
Hiroyuki Ogata0
Date of Patent
March 6, 2007
0Patent Application Number
105365640
Date Filed
January 30, 2004
0Patent Primary Examiner
Patent abstract
A black galvanized steel sheet including a composite coating layer formed on a surface of a blackened galvanized steel sheet by applying a treatment solution containing a phosphate ion, a vanadate ion, a metal ion, an α,β-unsaturated carboxylic acid and a glycoluril resin; and an organic resin layer formed on the composite coating layer, is provided. The black galvanized steel sheet is excellent in heat absorption and heat dissipation, electrical conductance, and corrosion resistance in a worked portion. Furthermore, the black galvanized steel sheet does not include hexavalent chromium.
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