公开(公告)号：US20230332295A1

公开(公告)日：2023-10-19

申请号：US18245346

申请日：2021-10-01

Applicant: JFE STEEL CORPORATION

Inventor： Kazuhisa OKAI ,  Rie KANEKO ,  Reona ENDO ,  Fuyuko IKEDA

IPC: C23C22/44 ,  C23C2/26 ,  C23C2/06 ,  B32B15/085 ,  B32B15/082 ,  B32B15/09

CPC classification number: C23C22/44 ,  C23C2/26 ,  C23C2/06 ,  B32B15/085 ,  B32B15/082 ,  B32B15/09

Abstract: Disclosed is a method of producing a surface-treated steel sheet for organic resin coating comprising: applying, to a surface of a zinc or zinc alloy coated or plated steel sheet, a surface-treatment solution containing a resin compound having a specific bisphenol skeleton, a cationic urethane resin emulsion, a silane coupling agent having a specific reactive functional group, an organic titanium chelate compound, a tetravalent vanadium compound, a molybdate compound, a fluorine compound, and water in a specific ratio and with a pH of 4 to 5 to form a surface-treatment layer such that a coating weight of the surface-treatment layer per surface after drying of the surface-treatment solution is 0.005 g/m2 to 1.8 g/m2.

公开(公告)号：US20190242018A1

公开(公告)日：2019-08-08

申请号：US16340134

申请日：2017-10-06

Applicant: JFE STEEL CORPORATION

Inventor： Reona ENDO ,  Kazuhisa OKAI ,  Hiroshi KAJIYAMA ,  Takashi KAWANO

IPC: C23C22/60 ,  C23C22/82

CPC classification number: C23C22/60 ,  C23C2/06 ,  C23C2/26 ,  C23C22/82 ,  C23C26/00 ,  C23C28/00 ,  C23C2222/20

Abstract: Disclosed is a surface-treatment solution for producing a zinc or zinc alloy coated steel sheet with a surface-coating layer that does not contain a chromium compound in the surface-coating layer and that is excellent in all of heat discoloration resistance, heat cracking resistance, planar part anti-corrosion property, corrosion resistance after alkali degreasing, blackening resistance, stack blackening resistance, anti-water stain property, solvent resistance, perspiration resistance, coating adhesion property, and storage stability. The disclosed surface-treatment solution contains a glycidyl group-containing silane coupling agent (A), a tetraalkoxysilane (B), a zirconium carbonate compound (C), and an anionic polyurethane resin (D) having a glass transition temperature (Tg) of 80° C. to 130° C., a vanadium compound (E), a molybdic acid compound (F), and water, the surface-treatment solution having a pH of 8.0 to 10.0, and the amount of each component satisfying a predetermined relationship.