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, stable manufacturing, and easy manufacturing
Active Publication Date: 2014-07-16
NIPPON STEEL CORP
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- Abstract
- Description
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- Application Information
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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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Examples
Experimental program
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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
A method of performing cathodic electrolytic film treatment on tinned steel sheets in a treatment solution that does not contain Cr compounds, F, and nitrate nitrogen. After cathodic electrolytic treatment in an aqueous solution containing sodium carbonate or sodium bicarbonate or immersion treatment in an aqueous solution of sulfuric acid, the tin oxide layer present on the tin-plated steel sheet before cathodic electrolytic film treatment is removed to a specified film thickness or less. Cathodic electrolytic film treatment is performed in an alkali metal sulfate aqueous solution of a zirconium compound to form a film having a specific film deposition amount in terms of Zr. The present invention provides a method for producing a chromium-free steel sheet for a container material excellent in adhesion to an organic resin film and iron elution resistance after dent impact, and the steel sheet for a container material produced thereby.
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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IPC IPC(8): C23C28/00C25D9/08C25F1/04
CPCC25F1/02C25D3/54C25D9/08C25D5/36Y10T428/12611C23C28/00C25F1/04
Inventor 门胁伸生中山浩典阿部雄司
Owner NIPPON STEEL CORP
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