Steel sheet used to manufacture a container and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9945037-B2
Application number	US-201314391655-A
Country	US
Kind code	B2
Filing date	Oct 15, 2013
Priority date	Oct 15, 2012
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A steel sheet used to manufacture a container, wherein the steel sheet includes a chromate film layer or a film layer including Zr on the Ni plating layer, the Ni plating layer includes one or more of a hydroxyl Ni and a Ni oxide, an adhesion amount of the Ni plating layer in terms of an amount of Ni is 0.3 g/m 2 or more, a concentration of oxygen atoms of the Ni plating layer due to the hydroxyl Ni and the Ni oxide is 1 to 10 atomic %, an adhesion amount of the chromate film layer in terms of the amount of Cr is 1 to 40 mg/m 2 , and an adhesion amount of the film layer including Zr in terms of an amount of Zr is 1 to 40 mg/m 2 or more.

First claim

The invention claimed is:

1. A steel sheet used to manufacture a container, the steel sheet comprising:
a Ni plating layer; and
a chromate film layer or a film layer including Zr, on the Ni plating layer,
wherein the Ni plating layer includes one or more of a hydroxyl Ni and a Ni oxide,
an adhesion amount of the Ni plating layer in terms of an amount of Ni is 0.3 g/m 2 or more,
a concentration of oxygen atoms of the Ni plating layer due to the hydroxyl Ni and the Ni oxide is 1 to 10 atomic %,
an adhesion amount of the chromate film layer in terms of an amount of Cr is 1 to 40 mg/m 2 , and
an adhesion amount of the film layer including Zr in terms of an amount of Zr is 1 to 40 mg/m 2 .

2. The steel sheet used to manufacture a container according to claim 1 , wherein
the concentration of oxygen atoms is 1 to 10 atomic % in an entire area of a thickness of the Ni plating layer excluding a natural oxide film formed on a surface of the Ni plating layer.

3. A method of manufacturing a steel sheet used to manufacture a container according to claim 1 , the method comprising:
forming the Ni plating layer including one or more of the hydroxyl Ni and the Ni oxide by dipping a base steel sheet in a plating bath and then performing a cathode-electrolysis, wherein a current density is set to a value higher than a critical current density of precipitation of Ni, the critical current density depending on a plating bath condition including a concentration of a Ni ion and a pH thereof, and wherein the plating bath consists of an aqueous solution in which one or more of a Ni sulfate and a Ni chloride is dissolved, and
forming the chromate film layer of which the adhesion amount in terms of the amount of Cr is 1 to 40 mg/m 2 on the Ni plating layer or forming the film layer including Zr of which the adhesion amount in terms of the amount of Zr is 1 to 40 mg/m 2 , on the Ni plating layer.

4. The method of manufacturing a steel sheet according to claim 3 ,
wherein a concentration of the Ni sulfate of the aqueous solution of the plating bath is set to 5% to 30% and a concentration of the Ni chloride of the aqueous solution of the plating bath is set to 5% to 30%.

5. The method of manufacturing a steel sheet according to claim 3 ,
wherein the pH of the plating bath is set to 2 to 4.

6. The method of manufacturing a steel sheet according to claim 4 ,
wherein the pH of the plating bath is set to 2 to 4.

Assignees

• Nippon Steel & Sumitomo Metal Corp

Inventors

• Hirano Shigeru
• Tani Yoshiaki

Classifications

• C25D9/08 Primary

  by cathodic processes · CPC title

• Y10T428/12611

  Oxide-containing component · CPC title

• C23C28/32 Primary

  including at least one pure metallic layer · CPC title

• C25D7/0614

  Strips or foils · CPC title

• C25D11/38

  Chromatising · CPC title