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Surface treating agent for galvanized steel sheet

A technology of surface treatment agent and galvanized steel sheet, which is applied in the direction of coating, anti-corrosion coating, metal material coating technology, etc., can solve problems such as halo and interference color, white appearance of the film, and cracks of the film, and achieve excellent properties, Appearance and grounding are well-balanced and well-balanced effects

Inactive Publication Date: 2011-11-16
NIHON PARKERIZING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In addition, in the case of hot-dip galvanizing with a beautiful surface, there are problems in these techniques that a film with many inorganic components is formed, fine cracks are generated on the film, the appearance of the film looks white (whitening), or halo is observed. interference color
[0019] In summary, it is impossible to obtain a surface-treated steel sheet that can replace the chromate film by any method, and it is urgent to develop a steel sheet that fully satisfies the corrosion resistance, appearance, grounding, condensation resistance, and coating properties of the film. Adhesion) and other characteristics, and can also be applied to the existing processing equipment surface treatment agent

Method used

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  • Surface treating agent for galvanized steel sheet
  • Surface treating agent for galvanized steel sheet
  • Surface treating agent for galvanized steel sheet

Examples

Experimental program
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Effect test

preparation example Construction

[0167] The preparation method of the surface treatment agent for galvanized steel sheets of the present invention is not particularly limited. For example, it can be produced by sufficiently mixing ammonium zirconium carbonate (A), compound (B), organic phosphonic acid (C), metal compound (D), other additives, and water using a mixer such as a mixing mixer.

[0168]

[0169] The surface treatment method using the surface treatment agent for galvanized steel sheet of the present invention is not particularly limited, and the following surface treatment method is preferred: the above-mentioned surface treatment agent for galvanized steel sheet is coated on the surface of galvanized steel sheet, dried, and The amount of film formed on the surface of the steel plate is 25-1000mg / m 2 of the membrane.

[0170] Hereinafter, this surface treatment method will be described.

[0171] In order to remove oil and dirt on the surface of the galvanized steel sheet, the galvanized steel s...

Embodiment

[0186] Hereinafter, the effects and effects of the present invention are specifically shown through examples, but the following examples are not intended to limit the present invention, and the situation of changing the plan according to the change of conditions is also included in the technical scope of the present invention.

[0187] (1) Test materials (materials)

[0188] The following commercially available materials were used as test materials.

[0189] (i) Electrogalvanized steel sheet (EG): plate thickness 0.8mm, weight per unit area = 20 / 20 (g / m 2 )

[0190] (ii) Hot-dip galvanized steel sheet (GI): plate thickness 0.8mm, unit area weight = 60 / 60 (g / m 2 )

[0191] (iii) Alloyed hot-dip galvanized steel sheet (GA): plate thickness 0.8mm, weight per unit area = 40 / 40 (g / m 2 )

[0192] In addition, weight per unit area represents the weight per unit area on the main surface of each steel plate. For example, in the case of electro-galvanized steel sheets, it is 20 / 20...

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Abstract

Disclosed is a surface treating agent for a galvanized steel sheet that can provide a surface treated galvanized steel sheet, which has various excellent properties such as excellent corrosion resistance and corrosion resistance after alkali degreasing, particularly has a good balance among corrosion resistance, appearance, and grounding properties in a formed film, and also has well balanced excellent properties regarding anti-dew condensation properties and coatability (coating film adhesion). The surface treating agent for a galvanized steel sheet comprises zirconium ammonium carbonate (A), a compound (B), which contains in one molecule two or more functional groups (a) represented by -SiR1R2R3, in which the molecular weight per functional group (a) (average molecular weight / number of functional groups) is in the range of 100 to 5000, an organic phosphonic acid (C), a metal compound (D) containing at least one metal element selected from the group consisting of Zr, Ti, Co, Fe, V, Ce, Mo, Mn, Mg, Al, Ni, Ca, W, Nb, Cr, and Zn, and water. The surface treating agent has a pH value of 6 to 11.

Description

technical field [0001] The present invention relates to a surface treatment agent for galvanized steel sheets, a surface treatment method using the surface treatment agent for galvanized steel sheets, and surface-treated galvanized steel sheets. Background technique [0002] At present, from the viewpoint of ensuring corrosion resistance, galvanizing is often performed on the surface of steel sheets for steel sheets. In addition, in order to further improve corrosion resistance and improve coating, alloyed galvanized steel sheets with various metals added are also used. [0003] In particular, places affected by acid rain and soot such as industrial areas or places affected by flying sea salt particles such as coastal areas are very harsh environments where corrosion of steel plates is likely to occur. Therefore, it is expected to be able to A galvanized steel sheet with superior corrosion resistance is used. In response to this need, hot-dip Zn-5%Al alloy steel sheets, ho...

Claims

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Application Information

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IPC IPC(8): C23C22/68C09D5/08C09D7/12C09D143/04C23C22/60C09D7/48C09D7/63
CPCC08K5/057C23C2222/20C23C22/60C23C22/68C09D7/1233C09D5/08C09D7/63C09D7/48
Inventor 内田淳一水野贤辅李玮
Owner NIHON PARKERIZING
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