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Process for production of steel sheet for container material which has reduced load on environments, steel sheet for container material which has reduced load on environments, and laminate steel sheet for container material and coated precoat steel

A technology for container materials and manufacturing methods, applied in electrolytic inorganic material coating, metal material coating technology, transportation and packaging, etc., to achieve the effects of excellent iron dissolution resistance, easy manufacturing, and stable manufacturing

Active Publication Date: 2012-12-12
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the invention disclosed in Patent Document 3, there is a disadvantage that in this electrolytic treatment, in order to keep the film deposition amount within an appropriate range, it is necessary to finely adjust the electrolytic conditions during the treatment.

Method used

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  • Process for production of steel sheet for container material which has reduced load on environments, steel sheet for container material which has reduced load on environments, and laminate steel sheet for container material and coated precoat steel
  • Process for production of steel sheet for container material which has reduced load on environments, steel sheet for container material which has reduced load on environments, and laminate steel sheet for container material and coated precoat steel
  • Process for production of steel sheet for container material which has reduced load on environments, steel sheet for container material which has reduced load on environments, and laminate steel sheet for container material and coated precoat steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0182] Example 1 is an example in which the steel plate is a in Table 1, the cathodic electrolytic treatment solution has a sodium sulfate concentration of 2.4% by mass, a zirconium concentration of 400 mg / L, an electrical conductivity of 1.2 S / m, and a pH of 1.9.

Embodiment 2

[0183] Example 2 is an example in which the steel plate is a in Table 1, the cathodic electrolytic treatment solution has a sodium sulfate concentration of 1.3% by mass, a zirconium concentration of 10 mg / L, an electrical conductivity of 2.0 S / m, and a pH of 1.9.

Embodiment 3

[0184] Example 3 is an example in which the steel plate is a in Table 1, the cathodic electrolytic treatment solution has a sodium sulfate concentration of 1.0% by mass, a zirconium concentration of 2000 mg / L, an electrical conductivity of 2.0 S / m, and a pH of 1.9.

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Abstract

Disclosed is a method for the cathodic electrocoating of a tin-coated steel sheet in a treatment solution that does not contain any Cr compound, F or nitrite nitrogen. In the method, a tin oxide layer that is not subjected to a cathodic electrocoating treatment yet and is arranged on a tin-coated steel sheet is thinned to a specified thickness or less by a cathodic electrocoating treatment in an aqueous solution containing sodium carbonate or sodium hydrogen carbonate or a aqueous sulfuric acid solution immersion treatment, and the tin oxide layer is subjected to a cathodic electrocoating treatment in an aqueous solution of an alkaline metal sulfate containing a zirconium compound having a specified composition. In this manner, a coating film is formed on the tin oxide layer at a specific adhered amount in terms of Zr content. Also disclosed are: a process for producing a chromium-free steel sheet for a container material, which has excellent adhesion to an organic resin film and excellent iron elution resistance after dent impact; and a steel sheet for a container material, which is produced by the process.

Description

technical field [0001] The present invention relates to a surface-treated metal material and a surface treatment method thereof. More specifically, the present invention relates to a steel plate for a container material and a container material with less environmental load that do not use a treatment liquid containing chromium, fluorine, or nitrate nitrogen in the base treatment of a steel plate. its method of manufacture. Background technique [0002] As treatments for improving the adhesion between metal materials such as steel sheets, zinc-based coated steel sheets, zinc alloy sheets, tin-based coated steel sheets, and aluminum alloy sheets, and organic films, chromium treatment, phosphate treatment, and silane coupling are conventionally known. Joint agent treatment, etc. Among them, chromium treatment is widely used in the fields of home appliances, building materials, vehicles, and metal containers due to its excellent corrosion resistance and adhesion, but it is poin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C25D9/08C25F1/04
CPCC25D9/08C25F1/02C25D5/36C25D3/54Y10T428/12611C23C28/00C25F1/04
Inventor 门胁伸生中山浩典阿部雄司
Owner NIPPON STEEL CORP
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