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Steel Sheet For Container, And Method For Producing Steel Sheet For Container

A manufacturing method and technology for steel plates, applied in chemical instruments and methods, manufacturing tools, coating of superimposed layers, etc., can solve the problem of corrosion resistance, coating adhesion or film adhesion reduction, hexavalent chromium keeping away, Hexavalent chromium is harmful and other problems, to achieve the effect of excellent film adhesion

Active Publication Date: 2018-02-16
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Recently, however, the use of hexavalent chromium has been shunned due to the environmental hazards of hexavalent chromium used in chromating
On the other hand, since the chromate film has excellent corrosion resistance and coating adhesion or film adhesion to the steel plate, the corrosion resistance and coating adhesion will be improved without such chromate treatment. Significantly reduced cohesion or membrane adhesion

Method used

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  • Steel Sheet For Container, And Method For Producing Steel Sheet For Container
  • Steel Sheet For Container, And Method For Producing Steel Sheet For Container
  • Steel Sheet For Container, And Method For Producing Steel Sheet For Container

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0063] figure 1 A configuration diagram showing a steel plate 1 for a container according to the first embodiment of the present invention.

[0064] The steel plate 1 for containers has: a steel plate 2 ; a Sn plating layer 3 formed on the steel plate 2 ; and a chemical conversion treatment film layer 4 formed on the Sn plating layer 3 .

[0065] The steel plate 2 used in this embodiment is not particularly limited, and steel plates generally used as container materials can be used. The manufacturing method, material, etc. of the steel plate 2 are not particularly limited, as long as it is manufactured through processes such as hot rolling, pickling, cold rolling, annealing, and temper rolling in a normal steel billet manufacturing process.

[0066] The content of Sn in the Sn plating layer 3 is 300 mg / m in terms of metal Sn amount 2 ~5600mg / m 2 .

[0067] It should be noted that the "Sn coating" in this specification includes not only coatings containing metal Sn, but als...

no. 2 Embodiment approach

[0191] figure 2 A configuration diagram showing a steel plate 11 for a container according to a second embodiment of the present invention.

[0192] The steel sheet 11 for containers has: a steel sheet 12 ; a Ni plating layer 15 formed on the steel sheet 12 ; a Sn plating layer 13 formed on the Ni plating layer 15 ; and a chemical conversion treatment film layer 14 formed on the Sn plating layer 13 .

[0193] The Ni plating layer 15 is formed on at least one surface of the steel sheet 12 . The Ni plating layer 15 may be made of metallic Ni or may also be made of Fe—Ni alloy plating.

[0194] Since Ni is a metal having excellent corrosion resistance, since the steel sheet 11 for containers has the Ni plating layer 15, corrosion resistance can be ensured.

[0195] The corrosion resistance improves as the Ni content of the Ni plating layer 15 increases. If the Ni content is 5mg / m in terms of metallic Ni 2 Above, it has excellent corrosion resistance. On the other hand, if t...

Embodiment

[0219] Examples and comparative examples of the present invention are described below. It should be noted that the examples shown below are merely examples of steel sheets for containers and methods of manufacturing steel sheets for containers according to embodiments of the present invention, and the steel sheets for containers and methods of manufacturing steel sheets for containers according to embodiments of the present invention are not It is not limited to the examples shown below.

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Abstract

This steel sheet for a container is provided with a steel sheet, an Sn plating layer formed on at least one surface of the steel sheet, and a chemically converted coating layer formed on the Sn plating layer, wherein the Sn plating layer contains 300-5600 mg / m2 of Sn in terms of the metallic Sn amount, the chemically converted coating layer contains 5-30 mg / m2 of a Zr compound in terms of the metallic Zr amount, and the average roughness Ra of the outermost surface of the chemically converted coating layer as determined by a scanning probe microscope is 10-100 nm. When the amount of change inthe yellowness index measured for one measurement point in the outermost surface of the chemically converted coating layer is defined as DELTAYI as represented in formula (1), the average value for the DELTAYI absolute values obtained for a plurality of measurement points included in a unit area of the outermost layer is 5.0 or less.

Description

technical field [0001] The present invention relates to a steel plate for containers and a method for manufacturing a steel plate for containers. Background technique [0002] As containers for beverages and foods, metal containers obtained by canning steel sheets such as Ni-plated steel sheets, Sn-plated steel sheets, or Sn-based alloy-plated steel sheets (steel sheets for containers) are often used. When such a metal container is used as a beverage container or a food container, it is necessary to coat the surface of the metal container before or after canning. [0003] However, in recent years, from the viewpoint of global environmental protection, in order to reduce exhaust of wastes such as waste solvents and carbon dioxide gas caused by coatings, it has become more common to attach films to the surface of metal containers instead of coating. [0004] In order to ensure corrosion resistance and paint adhesion (paint adhesion) or film adhesion (film adhesion), rust prev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/08C25D5/26
CPCC21D8/00C25D3/54C25D5/48C25D5/505C21D8/0278C21D8/0284C25D9/08C25D3/12C25D3/30C25D5/12C25D5/623C23C2/04B32B15/04C23C28/30C23C30/005C23C2/08C23C28/345C23C22/03C22C1/023B32B15/013C23C28/322B32B15/18C23C28/32C22C1/0483B32B15/01B32B15/043C23C22/07C23C28/34C23C30/00C23C28/321Y10T428/12965Y10T428/263Y10T428/12611Y10T428/265Y10T428/12972Y10T428/2495Y10T428/12722Y10T428/12951Y10T428/12993Y10T428/27Y10T428/12979Y10T428/12708Y10T428/1266Y10T428/12944Y10T428/12806Y10T428/12937Y10T428/12618Y10T428/12958Y10T428/264Y10T428/24967Y10T428/26C21D8/0205C21D8/0236C21D9/46C22C1/02C23F17/00
Inventor 立木光平野茂谷贤明横矢博一柳原伟男
Owner NIPPON STEEL CORP
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