Drishauf, Holtz, Goodman & Chick, P.C.
Surface-treated steel sheet
A surface-treated steel sheet is disclosed, including a zinc based plated steel sheet having thereon a surface-treated film containing titanium, nickel, aluminum and fluorine and having a film thickness of from 0.05 to 1.0 μm, the surface-treated film having a titanium deposition amount of from 0.01 to 0.5 g/m2 and containing from 0.01 to 5 parts by mass of nickel, from 0.1 to 25 parts by mass of aluminum and from 1 to 500 parts by mass of fluorine relative to 100 parts by mass of titanium. This surface-treated steel sheet does not contain hexavalent chromium in the film thereof at all and has excellent heat discoloration resistance, corrosion resistance and resistance to blackening.
Kansai Paint Co., Ltd. JFE Steel Corporation
Y C Y Y B Y Y Y Y Y Y C Y
Y10T C23C Y10T Y10T B32B Y10T Y10T Y10T Y10T Y10T Y10T C23C Y10T
additional inventional additional additional inventional additional additional additional additional additional additional inventional additional
Satoru Akira Takashi Yoshikazu Takahiro Nobue Jun Syuji Takashi
Ando Matsuzaki Nakano Morohoshi Kubota Fujibayashi Akui Nomura Okubo