STEEL SHEET FOR CAN EXHIBITING EXCELLENT CORROSION RESISTANCE

• US 20130143066A1
• Filed: 08/15/2011
• Published: 06/06/2013
• Est. Priority Date: 08/18/2010
• Status: Active Grant

• Current Assignee: Nippon Steel Corporation
• Original Assignee: Nippon Steel & Sumitomo Metal Corporation (Nippon Steel Corporation)
• Inventors: Hirano, Shigeru, Kawabata, Makoto
• Granted Patent: US 8,753,754 B2
• Time in Patent Office: Days
• US Class Current: 428/632
• CPC Class Codes: B32B 15/013 one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
• CPC Class Codes: B32B 15/015 the said other metal being copper or nickel or an alloy thereof
• CPC Class Codes: B32B 15/04 comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042
• CPC Class Codes: B32B 15/18 comprising iron or steel B32B15/011, B32B15/012 and B32B15/013 take precedence
• CPC Class Codes: B65D 7/42 Details of metal walls casks, barrels or drums in their entirety B65D7/045; other container details B65D23/00, B65D25/00
• CPC Class Codes: B65D 85/00 Containers, packaging elements or packages, specially adapted for particular articles or materials B65D71/00, B65D83/00 take precedence; hand implements or travelling equipment A45C; cosmetic or toiletry equipment A45D; packages for surgical knives, scalpels or blades therefor A61B17/3215; containers specially adapted for medical or pharmaceutical purposes A61J1/00; paint cans B44D3/12; oil cans F16N3/04; containers for carrying small arms F41C33/06; packaging of ammunition or explosive charges F42B39/00; containers for record carriers, specially adapted for cooperation with the recording or reproducing apparatus G11B23/00
• CPC Class Codes: C21D 9/00 Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
• CPC Class Codes: C22C 19/00 Alloys based on nickel or cobalt
• CPC Class Codes: C22C 19/002 with copper as the next major constituent
• CPC Class Codes: C22C 19/03 based on nickel
• CPC Class Codes: C22C 30/02 containing copper
• CPC Class Codes: C22C 38/00 Ferrous alloys, e.g. steel alloys cast-iron alloys C22C37/00
• CPC Class Codes: C22C 9/06 with nickel or cobalt as the next major constituent
• CPC Class Codes: C23C 22/24 containing hexavalent chromium compounds
• CPC Class Codes: C23C 28/321 with at least one metal alloy layer
• CPC Class Codes: C23C 28/34 including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
• CPC Class Codes: C23C 28/3455 with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer
• CPC Class Codes: C25D 11/38 Chromatising
• CPC Class Codes: C25D 3/12 of nickel or cobalt
• CPC Class Codes: C25D 3/562 containing more than 50% by weight of iron or nickel or cobalt
• CPC Class Codes: C25D 5/48 : After-treatment of electroplated surfaces
• CPC Class Codes: C25D 9/08 : by cathodic processes
• CPC Class Codes: C25D 9/10 : on iron or steel
• CPC Class Codes: Y10T 428/12611 : Oxide-containing component
• CPC Class Codes: Y10T 428/12806 : Refractory [Group IVB, VB, or VIB] metal-base component
• CPC Class Codes: Y10T 428/12937 : Co- or Ni-base component next to Fe-base component

Abstract

The present invention provides a steel sheet for a can exhibiting excellent corrosion resistance, adhesive properties, and weldability, including a steel sheet, an Ni—Cu alloy plating layer formed on at least one surface of the steel sheet; and a chromate film layer formed on a surface of the Ni—Cu alloy plating layer, in which the Ni—Cu alloy plating layer has Ni attached thereto in an amount of from 0.30 g/m² to 3.0 g/m², and Cu contained therein in an amount of from 0.5 mass % to 20 mass %; and the chromate film layer has Cr attached thereto in an amount of from 1.0 mg/m² to 40 mg/m² in equivalent units of Cr.

Claims

1. A steel sheet for a beverage can exhibiting excellent corrosion resistance, adhesive property, and weldability, comprising:

a steel sheet;

an Ni—

Cu alloy plating layer formed on at least one surface of the steel sheet; and

a chromate film layer formed on a surface of the Ni—

Cu alloy plating layer, wherein

the Ni—

Cu alloy plating layer has Ni attached thereto in an amount of from 0.30 g/m² to 3.0 g/m², and Cu contained therein in an amount of from 0.5 mass % to 20 mass %; and

the chromate film layer has Cr attached thereto in an amount of from 1.0 mg/m² to 40 mg/m² in equivalent units of Cr.

2. A steel sheet for a beverage can exhibiting excellent corrosion resistance, adhesive properties, and weldability, comprising:

a steel sheet;

a Ni—

Cu alloy plating layer formed on at least one surface of the steel sheet; and

a Zr-containing film layer formed on a surface of the Ni—

Cu alloy plating layer, wherein

the Ni—

Cu alloy plating layer has Ni attached thereto in an amount of from 0.30 g/m² to 3.0 g/m², and Cu contained therein in an amount of from 0.5 mass % to 20 mass %, and

the Zr-containing film layer has Zr attached thereto in an amount of from 1.0 mg/m² to 40 mg/m² in equivalent units of Zr.