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Electrically zn-plated steel sheet having excellent stain resistance

An electro-galvanized, anti-fouling technology, applied in the direction of superimposed layer plating, coating, layered products, etc., can solve problems such as uneven appearance improvement, uneven appearance improvement of electro-galvanized steel sheet, and no protection against dirt, etc. White rust resistance and stain resistance improvement effect

Active Publication Date: 2009-08-12
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the techniques for improving the uneven appearance of electrogalvanized steel sheets proposed so far relate to methods for preventing white rust or blackening before the occurrence of white rust (for example, Patent Document 1 to Patent Document 4), and do not provide methods for preventing fouling. Targeted appearance unevenness improvement technology

Method used

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  • Electrically zn-plated steel sheet having excellent stain resistance
  • Electrically zn-plated steel sheet having excellent stain resistance
  • Electrically zn-plated steel sheet having excellent stain resistance

Examples

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Embodiment 1

[0101] Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to the following examples, and may be appropriately modified and implemented within a range that can fit the principles described above and below. Such an embodiment Also included in the technical scope of the present invention.

[0102] · Example 1

[0103] In the present Example, the influence of the type and content of the elements contained in the plating layer on the stain resistance and further on the white rust resistance was investigated. Here, a resin film was produced in the same manner as the method described in Example 1 of the above-mentioned Japanese Patent Application Laid-Open No. 2006-43913 (Japanese Patent Application No. 2004-224454).

[0104] (1) Preparation of resin aqueous solution

[0105] Here, a resin film is produced using an aqueous resin solution containing a carboxyl group-containing urethane resin aqueous soluti...

Embodiment 2

[0158] In this example, the effect of improving the fouling resistance by the addition of the silane coupling agent was examined. Here, as shown below, chromate-free galvanized steel sheets having three kinds of resin coatings with different mixing ratios of resin components and colloidal silica were produced, and the influence of the silane coupling agent on each chromate-free galvanized steel sheet was investigated. .

[0159] (No.95~98)

[0160] In the above-mentioned Example 1, with respect to "(1-3) Preparation of aqueous resin liquid", the aqueous polyurethane resin liquid containing carboxyl group, the aqueous ethylene-acrylic acid copolymer dispersion liquid, the colloidal silica (mixed with ratio = 5 parts by mass: 25 parts by mass: 70 parts by mass) in total of 100 parts by mass, and as shown in Table 4, the silane coupling agent was added in the range of 0, 10 parts by mass, 20 parts by mass, and 30 parts by mass, except Otherwise, a resin coating was produced in ...

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Abstract

Disclosed is an electrically Zn-plated steel sheet which comprises an electrically Zn-plated layer and a resin coating film provided on the electrically Zn-plated layer and containing substantially no Cr and 0.05 to 5% by mass of Na. The electrically Zn-plated layer contains at least one member selected from the group consisting of Ni, Fe, Cr, Mo, Sn, Cu, Cd, Ag, Si, Co, In, Ir and W respectively in the following amounts in terms of atom: Ni: 60-6000 ppm (''ppm'' means ppm by mass, ditto for the following), Fe: 60-600 ppm, Cr: 0.5-5 ppm, Mo: 30-500 ppm, Sn: 0.6-20 ppm, Cu: 8-3000 ppm, Cd: 0.0001-0.02 ppm, Ag: 1.0-400 ppm, Si: 30-2000 ppm, Co: 0.0003-0.3 ppm, In: 0.1-30 ppm, Ir: 0.01-10 ppm, and W: 0.1-50 ppm.

Description

technical field [0001] The present invention relates to an electro-galvanized steel sheet having excellent fouling resistance and a method for producing the same, and more specifically, to an electro-galvanized steel sheet having a resin film substantially free of Cr, and an appearance that can effectively suppress fouling caused by Na in the resin film Technology for improving uneven (inconspicuous) stain resistance. The electro-galvanized steel sheet of the present invention is suitable for applications that are mainly used indoors, such as cabinets, housing parts, steel furniture, and the like for home appliances and OA equipment, for example. Background technique [0002] From the viewpoint of restricting the use of hazardous substances, electro-galvanized steel sheets (chromate-free electro-galvanized steel sheets) having a chromate-free chemically-treated coating that does not contain hexavalent chromium are widely used. Such non-chromate electro-galvanized steel shee...

Claims

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Application Information

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IPC IPC(8): C25D5/26B32B15/08C25D5/48
CPCC25D5/48C23C28/00C25D3/565
Inventor 岩井正敏奥村和生久野彰士
Owner KOBE STEEL LTD