Surface-Treated Steel Sheet, Organic Resin Coated Metal Container, and Method for Producing Surface-Treated Steel Sheet

Patent metadata

Field	Value
Publication number	US-2017342584-A1
Application number	US-201715678884-A
Country	US
Kind code	A1
Filing date	Aug 16, 2017
Priority date	Sep 25, 2013
Publication date	Nov 30, 2017
Grant date	—

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/m 2 and the F amount is 0.5 to 10 mg/m 2 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/m 2 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/m 2 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.

First claim

What is claimed is:

1 . A method for producing a surface-treated steel sheet having a compound layer containing F and composed essentially of Zr at least on one surface of a steel sheet, the method comprising:
forming a layer where a Zr amount within the layer is 80 to 350 mg/m 2 by performing a cathode electrolytic treatment to the steel sheet in an aqueous solution containing a Zr ion and F ion; and adjusting a surface to control the F amount within the layer to 0.5 to 10 mg/m 2 by performing any one or more treatments selected from immersion to an ion-containing aqueous solution, spraying of the ion-containing aqueous solution, and cathode electrolytic treatment in the ion-containing aqueous solution.

2 . The method for producing a surface-treated steel sheet according to claim 1 , wherein the ion-containing aqueous solution in adjusting the surface is an alkaline aqueous solution containing one or more types of ions selected from a sodium ion, ammonium ion, and potassium ion.

3 . The method for producing a surface-treated steel sheet according to claim 1 , wherein a pH of the ion-containing aqueous solution in adjusting the surface is 9 or more.

4 . A method for producing a surface-treated steel sheet for forming a compound layer containing F and composed essentially of Zr at least on one surface of a steel sheet, the method comprising:
forming a layer where a Zr amount within the layer is 80 to 350 mg/m 2 by performing a cathode electrolytic treatment to the steel sheet in an aqueous solution containing a Zr ion and F ion; and adjusting the surface to control a F amount within the layer to 0.5 to 10 mg/m 2 by performing spraying and/or immersion with water of 90° C. or more to the steel sheet.

Assignees

• Toyo Kohan Co Ltd
• Toyo Seikan Group Holdings Ltd

Inventors

• Yoshimura Kunihiro
• Taguchi Naomi
• Fukutomi Satoko
• Kurokawa Wataru
• Hirotsu Munemitsu
• Aihara Mitsuhide
• Mikami Satoshi

Classifications

• C25D21/12

  Process control or regulation (controlling or regulating in general G05) · CPC title

• C25D3/54

  of metals not provided for in groups C25D3/04 - C25D3/50 · CPC title

• C25D7/00 Primary

  Electroplating characterised by the article coated · CPC title

• C25D9/10 Primary

  on iron or steel · CPC title