SURFACE-TREATMENT LIQUID FOR GALVANIZED SHEET STEEL, GALVANIZED SHEET STEEL, AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2011/161968

A1

The disclosed galvanized sheet steel not only excels in appearance and corrosion resistance after press forming, but also retains oil well in high-temperature and high-temperature/high-humidity environments. Said galvanized sheet steel has a film on the surface thereof, with between 10 and 200 mg/m² of attached zirconium. Said film is obtained by applying a surface-treatment liquid and then drying said surface-treatment liquid by heating. Said surface-treatment liquid contains the following in a specific ratio: a water-soluble zirconium compound (A); water-dispersible microparticulate silica (B); a silane coupling agent (C); a vanadic acid compound (D); a phosphoric acid compound (E); a nickel compound (F); an acrylic resin emulsion (G); and an organopolysiloxane compound (H).

TAKASHIMA KATSUTOSHI (JP)
OKAI KAZUHISA (JP)
MATSUDA TAKESHI (JP)
MATSUZAKI AKIRA (JP)
ANDO SATORU (JP)

PCT/JP2011/003596

December 29, 2011

June 23, 2011

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JFE STEEL CORP (JP)
TAKASHIMA KATSUTOSHI (JP)
OKAI KAZUHISA (JP)
MATSUDA TAKESHI (JP)
MATSUZAKI AKIRA (JP)
ANDO SATORU (JP)

C23C22/60; C09D7/61; C23C22/07; C23C22/42; C23C22/62; C23C22/68; C23C28/00

WO2010061964A1

2010-06-03

JP2008169470A	2008-07-24
JP2009180167A	2009-08-13

SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)

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