Invention Grant
- Patent Title: Surface-treated steel sheet, organic resin coated metal container, and method for producing surface-treated steel sheet
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Application No.: US15678884Application Date: 2017-08-16
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Publication No.: US10934629B2Publication Date: 2021-03-02
- Inventor: Kunihiro Yoshimura , Naomi Taguchi , Satoko Fukutomi , Wataru Kurokawa , Munemitsu Hirotsu , Mitsuhide Aihara , Satoshi Mikami
- Applicant: TOYO KOHAN CO., LTD. , Toyo Seikan Group Holdings, Ltd.
- Applicant Address: JP Tokyo; JP Shinagawa-Ku
- Assignee: TOYO KOHAN CO., LTD.,Toyo Seikan Group Holdings, Ltd.
- Current Assignee: TOYO KOHAN CO., LTD.,Toyo Seikan Group Holdings, Ltd.
- Current Assignee Address: JP Tokyo; JP Shinagawa-Ku
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: JPJP2013-197714 20130925
- Main IPC: C25D7/00
- IPC: C25D7/00 ; C25D9/10 ; C25D3/54 ; C25D21/12

Abstract:
Provided is a surface-treated steel sheet with a compound layer containing F and composed essentially or Zr at least on one surface thereof, wherein the Zr amount is 80 to 350 mg/m2 and the F amount is 0.5 to 10 mg/m2 within the layer, and an organic resin coated metal container manufactured using the surface-treated steel sheet. The surface-treated steel sheet of the present invention is manufactured through forming a layer having the Zr amount of 80 to 350 mg/m2 at least on one surface of a steel sheet by cathode electrolytic treatment in an aqueous solution containing a Zr ion and F ion, and subsequently adjusting the surface to control the F amount to 0.5 to 10 mg/m2 by one or more treatments selected from immersion and spraying with an ion-containing aqueous solution and cathode electrolytic treatment in the ion-containing aqueous solution.
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