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Steel sheet for cans and production method for steel sheet for cans

A manufacturing method and technology for steel plates, which are applied in chemical instruments and methods, coating of superimposed layers, transportation and packaging, etc., can solve the problems of metal powder mixed with contents, danger, and increased maintenance burden such as canning equipment cleaning, etc. Excellent surface appearance

Active Publication Date: 2018-08-03
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in industrial production, there are many problems such as the risk of the ground metal powder being mixed into the contents, the increase in the maintenance burden such as cleaning of the can making equipment, and the risk of fire caused by the metal powder.

Method used

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  • Steel sheet for cans and production method for steel sheet for cans
  • Steel sheet for cans and production method for steel sheet for cans

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0116] Hereinafter, an Example is given and this invention is demonstrated concretely. However, the present invention is not limited to these Examples.

[0117] 〔Manufacture of steel plate for cans〕

[0118] A steel plate with a tempering degree of T4CA manufactured with a plate thickness of 0.22 mm is subjected to normal degreasing and pickling, and then the aqueous solution shown in the following Table 1 is circulated by a pump at an equivalent of 100 mpm in a flow tank, and a lead electrode is used. Electrolytic treatment was performed under the conditions shown in Table 2 below to produce TFS steel sheets for cans. The produced cans are washed with water on a steel plate and dried at room temperature with a hair dryer.

[0119] More specifically, only in Comparative Example 2, after performing cathodic electrolytic treatment in the first stage, anodic electrolytic treatment, and cathodic electrolytic treatment in the latter stage using the first liquid (aqueous solution ...

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PUM

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Abstract

Provided is a steel sheet for cans that has an excellent surface appearance. Also provided is a production method for the steel sheet for cans. The steel sheet for cans has, on the surface thereof, inorder from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The chromium metal layer is deposited in an amount of 65-200 mg / m2, and the hydrous chromium oxide layer isdeposited in an amount of 3-15 mg / m2 in terms of chromium. The chromium metal layer includes: a flat chromium metal layer that has a thickness of at least 7 nm; and a granular chromium metal layer that includes granular protrusions that are formed on the surface of the flat chromium metal layer. The maximum grain size of the granular protrusions is 100 nm or smaller. The number density of the granular protrusions per unit area is 10 / [mu]m2 or higher.

Description

technical field [0001] The present invention relates to a steel plate for cans and a manufacturing method thereof. Background technique [0002] Cans, which are containers suitable for beverages and foods, are used all over the world because they can store their contents for a long period of time. Cans are roughly divided into two-piece cans and three-piece cans. The two-piece cans are deep-drawn, thinned, drawn, stretched, and bent on the metal plate. After the bottom and body of the can are integrally formed, the top cover is used to Hemming is performed; the three-piece can is formed by processing a metal plate into a cylindrical shape, and hemming the can body and its two ends welded by a seam with a lid. [0003] In the past, Sn-plated steel sheets (so-called tinplate) have been widely used as steel sheets for cans. In recent years, electrolytic chromate-treated steel sheets (hereinafter referred to as tin-free steel sheets (TFS)) having a metallic chromium layer and a...

Claims

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Application Information

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IPC IPC(8): C23C28/00C25D5/16C25D5/26C25D9/10C25D11/38C25D21/12C25F3/08
CPCC25D9/10C25F3/08C25D3/08C25D7/04C25D9/06C23C28/322C23C28/345C25D5/627C25D5/617C25D5/605C25D5/14C25D11/38C25D7/0614C25D5/12C23C28/3455C25D13/02C25D13/14C25D21/12C25D7/06C23C28/34C23C30/00C23C30/005C23C28/40C25D5/36C25D3/06C23C28/30B32B15/04B32B15/013B32B15/18B32B15/043Y10T428/12854Y10T428/12972Y10T428/264Y10T428/12993Y10T428/24967Y10T428/12847Y10T428/265Y10T428/24942Y10T428/12979Y10T428/263Y10T428/26C23C28/32C25D3/04
Inventor 中川祐介铃木威须藤干人小岛克己马场雄也
Owner JFE STEEL CORP