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Steel sheet for containers and method for producing steel sheet for containers

A manufacturing method and technology of steel plates, applied in chemical instruments and methods, transportation and packaging, packaging, etc., can solve problems such as harmful hexavalent chromium, and achieve excellent gloss and corrosion resistance.

Active Publication Date: 2020-09-22
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]However, the hexavalent chromium used in chromate treatment is environmentally harmful

Method used

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  • Steel sheet for containers and method for producing steel sheet for containers
  • Steel sheet for containers and method for producing steel sheet for containers
  • Steel sheet for containers and method for producing steel sheet for containers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0087] Hereinafter, the steel plate for containers and the manufacturing method of the steel plate for containers which concern on embodiment of this invention are demonstrated concretely by showing a test example. In addition, the test example shown below is an example of the steel plate for containers and the manufacturing method of the steel plate for containers related to the embodiment of the present invention after all, and the steel plate for containers and the manufacturing method of the steel plate for containers concerning the embodiment of the present invention are not It is limited to the following examples.

[0088]

[0089] First, the steel plate (base material steel plate) used for the test was prepared. As the steel plate, a steel plate used for general container use was used.

[0090] Next, a metallic chromium layer and a chromium-containing layer were simultaneously formed on the surface of the steel sheet by the following method. Thus, a steel plate for ...

Embodiment 2

[0117] First, the steel plate (base material steel plate) used for the test was prepared. As the steel plate, a steel plate used for general container use was used.

[0118] Next, a metallic chromium layer and a chromium-containing layer were simultaneously formed on the surface of the steel sheet by the following method. Thus, a steel plate for containers was obtained.

[0119] The metallic chromium layer and the chromium-containing layer were formed by immersing the steel sheet in a chemical conversion treatment bath having the composition shown in Table 4 and performing an electrical treatment (electrolytic treatment). The non-electrolysis time of this embodiment is set to 2.2 seconds. At this time, as a rule, the temperature of the chemical conversion treatment bath is set to 60°C, and the current density is set to 10A / dm 2 , the energization time was set to 1 second, and the conditions of the electrolytic treatment were appropriately changed according to the target dep...

Embodiment 3

[0125] First, the steel plate (base material steel plate) used for the test was prepared. As the steel plate, a steel plate used for general container use was used.

[0126] Next, a metallic chromium layer and a chromium-containing layer were simultaneously formed on the surface of the steel sheet by the following method. Thus, a steel plate for containers was obtained.

[0127] The metallic chromium layer and the chromium-containing layer were formed by performing electrolytic treatment while immersing the steel sheet in a chemical conversion treatment bath having the composition shown in Table 5. In addition, the conditions of the electrolytic treatment are as shown in Table 5. The non-electrolysis time in this embodiment is set to 0.5 seconds. In addition, "-" about a compound in Table 5 shows that this compound is not contained. "-" for electrolytic treatment indicates that no electric current is applied.

[0128] Table 6 shows the configurations of the steel sheets f...

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Abstract

This steel sheet for containers comprises a base steel sheet, a chromium metal layer and a chromium-containing layer. This steel sheet for containers is configured such that: the chromium metal layeris positioned on at least one surface of the base steel sheet; the chromium-containing layer is positioned on the chromium metal layer, while containing a trivalent chromium compound in the form of particles, or alternatively containing a trivalent chromium compound in the form of particles and chromium metal in the form of particles; the chromium metal layer and the chromium-containing layer arearranged on the base steel sheet in the form of two separate layers; the average particle diameter of the trivalent chromium compound and the chromium metal is from 10 nm to 100 nm (inclusive) in thechromium-containing layer; and the adhesion amount of the chromium-containing layer is from 1.0 mg / m2 to 100 mg / m2 (inclusive) in terms of Cr.

Description

technical field [0001] The present invention relates to a steel sheet for containers and a method for manufacturing a steel sheet for containers. [0002] This application claims priority based on Patent Application No. 2018-022296 filed in Japan on February 9, 2018, the contents of which are incorporated herein by reference. Background technique [0003] One of the changes that metals undergo over time in use is corrosion of the metal. Conventionally, various techniques have been proposed to prevent possible corrosion of metals. One of the techniques is to apply plating to a metal plate, or to perform various surface treatments on the surface of the metal plate or the plating. [0004] In the manufacture of metal containers for the storage of beverages and foods, plated steel sheets such as nickel-plated steel sheets, tin-plated steel sheets, and tin-based alloy-coated steel sheets on which so-called barrier plating layers are formed are used. When these plated steel she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/38
CPCC25D9/10C23C2222/10C23C22/50C25D3/06C25D11/38B65D65/42B32B15/04B32B2255/205Y10T428/12583Y10T428/12854Y10T428/12972
Inventor 谷贤明平野茂
Owner NIPPON STEEL CORP