Ni-PLATED STEEL SHEET, AND METHOD FOR PRODUCING Ni-PLATED STEEL SHEET

Patent metadata

Field	Value
Publication number	US-2016102414-A1
Application number	US-201414787498-A
Country	US
Kind code	A1
Filing date	Apr 30, 2014
Priority date	Apr 30, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

A Ni-plated steel sheet according to the present invention includes a steel sheet, a first Ni-plated layer which is formed at least on a one-sided surface of the steel sheet and contains Ni, and a second Ni-plated layer which is formed on the first Ni-plated layer and contains Ni. An average central-line roughness Ra at an interface between the first Ni-plated layer and the second Ni-plated layer is less than 0.1 μm, an average central-line roughness Ra of a surface of the second Ni-plated layer is 0.1 μm to 100 μm, and a coating amount of Ni in the entirety of the first Ni-plated layer and the second Ni-plated layer is 20 mg/m 2 to 2500 mg/m 2 per one-sided surface in terms of metal Ni.

First claim

1 . A Ni-plated steel sheet, comprising:
a steel sheet; a first Ni-plated layer which is formed at least on a one-sided surface of the steel sheet and contains Ni; and a second Ni-plated layer which is formed on the first Ni-plated layer and contains Ni, wherein an average central-line roughness Ra at an interface between the first Ni-plated layer and the second Ni-plated layer is less than 0.1 μm, an average central-line roughness Ra of a surface of the second Ni-plated layer is 0.1 μm to 100 μm, and a coating amount of Ni in an entirety of the first Ni-plated layer and the second Ni-plated layer is 20 mg/m 2 to 2500 mg/m 2 per one-sided surface in terms of metal Ni.

2 . The Ni-plated steel sheet according to claim 1 ,
wherein an amount of chlorine in the first Ni-plated layer is 0 ppm to 100 ppm.

3 . The Ni-plated steel sheet according to claim 1 or 2 ,
wherein a coating amount of Ni in the first Ni-plated layer is 15 mg/m 2 to 2000 mg/m 2 per one-sided surface intents of metal Ni, and
a coating amount of Ni in the second Ni-plated layer is 5 mg/m 2 to 500 mg/m 2 per one-sided surface in terms of metal Ni.

4 . The Ni-plated steel sheet according to any one of claims 1 to 3 , further comprising:
a chemical conversion treatment film layer, which contains at least one of a chromium oxide, a zirconium compound, a phosphate compound, a titanium oxide, an aluminum oxide, and a manganese oxide, on the second Ni-plated layer.

5 . The Ni-plated steel sheet according to any one of claims 1 to 4 ,
wherein the coating amount of Ni is 400 mg/m 2 to 1000 mg/m 2 per one-sided surface in terms of metal Ni.

6 . The Ni-plated steel sheet according to any one of claims 1 to 5 ,
wherein the coating amount of Ni in the first Ni-plated layer is 300 mg/m 2 to 800 mg/m 2 per one-sided surface in terms of metal Ni, and
the coating amount of Ni in the second Ni-plated layer is 100 mg/m 2 to 200 mg/m 2 per one-sided surface in terms of metal Ni.

7 . The Ni-plated steel sheet according to any one of claims 1 to 6 ,
wherein a surface of the second Ni-plated layer has unevenness in which an average height difference in a thickness direction of the steel sheet is 1 μm to 10 μm.

8 . A method for producing a Ni-plated steel sheet, comprising:
a first plating process of subjecting a steel sheet to an electrolysis treatment in a first Ni-plating bath containing 5 g/L to 60 g/L of Ni ions, 20 g/L to 300 g/L of sulfate ions, 10 g/L to 60 g/L of borate ions, and less than 0.5 g/L of chloride ions to form a first Ni-plated layer on the steel sheet; and a second plating process of subjecting the steel sheet, on which the first Ni-plated layer is formed, to an electrolysis treatment in a second Ni-plating bath containing 5 g/L to 60 g/L of Ni ions, 20 g/L to 300 g/L of sulfate ions, 10 g/L to 60 g/L of borate ions, and 10 g/L to 60 g/L of chloride ions to form a second Ni-plated layer on the first Ni-plated layer, wherein a temperature of the first Ni-plating bath and a temperature of the second Ni-plating bath are equal to or higher than 10° C. and lower than 90° C., and in the first plating process and the second plating process, the electrolysis treatment is performed at a current density of 1.0 A/dm 2 to 100 A/dm 2 for an electrolysis treatment time of 0.2 seconds to 150 seconds.

9 . The method for producing a Ni-plated steel sheet according to claim 8 ,
wherein a rinsing process is not provided between the first plating process and the second plating process.

Assignees

• Nippon Steel & Sumitomo Metal Corp

Inventors

• Tani Yoshiaki
• Hirano Shigeru
• Tachiki Akira
• Yanagihara Morio
• Kawabata Makoto
• Yokoya Hirokazu

Classifications

• B32B15/015

  the said other metal being copper or nickel or an alloy thereof · CPC title

• C25D17/10

  Electrodes {, e.g. composition, counter electrode} · CPC title

• C25D7/0614

  Strips or foils · CPC title

• C25D5/36

  of iron or steel · CPC title

• C25D5/48

  After-treatment of electroplated surfaces · CPC title