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Pre-treatment technology of color-coated plate with high adhesive force

A high-adhesion, color-coated board technology, used in pretreatment surfaces, coatings, devices for coating liquids on surfaces, etc. To achieve the effect of excellent adhesion performance, adhesion performance improvement, scratch resistance performance improvement

Inactive Publication Date: 2019-11-29
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the storage time of some color-coated boards increases, the adhesion between the coating and the substrate will decrease, and at the same time, it may be accompanied by failures such as powdering, blistering, and damage of the paint film.

Method used

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  • Pre-treatment technology of color-coated plate with high adhesive force
  • Pre-treatment technology of color-coated plate with high adhesive force
  • Pre-treatment technology of color-coated plate with high adhesive force

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The free alkali in the first alkali washing tank is 3.23, the alkali ratio is 1.34, the conductivity is 8.9ms / cm, and the temperature is 55.8°C;

[0058] The free alkali in the second alkali washing tank is 2.82, the alkali ratio is 1.21, the conductivity is 7.8ms / cm, and the temperature is 55.8°C;

[0059] The total alkali of the first hot water rinse tank is 1.22, the conductivity is 100.5ms / cm, and the temperature is 53.8°C;

[0060] The free alkali of the first composite oxidation tank is 5.31, the alkali ratio is 1.25, the conductivity is 52.1ms / cm, and the temperature is 54.4°C;

[0061] The free base of the second composite oxidation tank is 6.41, the base ratio is 1.2, the conductivity is 57.6ms / cm, and the temperature is 50.8°C;

[0062] The total alkali of the second hot water rinse tank is 0.82, the conductivity is 384.5μs / cm, and the temperature is 53.8℃;

[0063] The total alkali of the third hot water rinse tank is 0.09, the conductivity is 23.5μs / cm, and ...

Embodiment 2

[0066] The free alkali in the first alkali washing tank is 3.56, the alkali ratio is 1.24, the conductivity is 9.1ms / cm, and the temperature is 55.2°C;

[0067] The free alkali in the second alkali washing tank is 3.09, the alkali ratio is 1.11, the conductivity is 8.2ms / cm, and the temperature is 54.8°C;

[0068] The total alkali of the first hot water rinse tank is 1.29, the conductivity is 99.8ms / cm, and the temperature is 52.9°C;

[0069] The free alkali of the first composite oxidation tank is 5.56, the alkali ratio is 1.15, the conductivity is 52.5ms / cm, and the temperature is 53.5°C; the free alkali of the second composite oxidation tank is 5.82, the alkali ratio is 1.2, the conductivity is 57.9ms / cm, and the temperature is 50.5°C;

[0070] The total alkali of the second hot water rinse tank is 0.68, the conductivity is 276.8μs / cm, and the temperature is 45.5℃;

[0071] The total alkali of the third hot water rinse tank is 0.08, the conductivity is 24.5ms / cm, and the t...

Embodiment 3

[0074] The free alkali in the first alkali washing tank is 3.18, the alkali ratio is 1.23, the conductivity is 9.2ms / cm, and the temperature is 56.1°C;

[0075] The free alkali in the second alkali washing tank is 3.09, the alkali ratio is 1.11, the conductivity is 8.3ms / cm, and the temperature is 54.8°C;

[0076] The total alkali of the first hot water rinse tank is 1.08, the conductivity is 102.3ms / cm, and the temperature is 54.1°C;

[0077] The free alkali of the first composite oxidation tank is 5.95, the alkali ratio is 1.31, the conductivity is 52.0ms / cm, and the temperature is 55.1°C;

[0078] The free alkali of the second compound oxidation tank is 6.19, the alkali ratio is 1.13, the conductivity is 56.8ms / cm, and the temperature is 50.7°C;

[0079] The total alkali of the second hot water rinse tank is 0.67, the conductivity is 392.8μs / cm, and the temperature is 44.7℃;

[0080] The total alkali of the third hot water rinse tank is 0.11, the conductivity is 23.8μs / cm...

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Abstract

The invention discloses a pre-treatment technology of color-coated plate with high adhesive force. The technology includes the cleaning process, the chemical treatment process and the baking and cooling process, wherein primary alkali washing, secondary alkali washing, primary hot water rinsing, primary composite oxidation, secondary composite oxidation, secondary hot water rinsing and third-timehot water rinsing are adopted. The technology is suitable for current large-scale colored coating production lines, and the T-bending property and aging T-bending property of products produced throughthe technology are superior to those of a common pretreatment technology. The color-coated plate produced through the pretreatment technology has excellent adhesive force performance, and the T-bending property and aging T-bending property of the products are higher than those of the traditional pretreatment technology and can be improved by 1-2 levels. The erichsen value is obviously improved, the scratch resistance is remarkably improved, the cross cut test for adhesion reaches the zero level, and the adhesive force property of the products is greatly improved.

Description

technical field [0001] The invention relates to a production method of a color-coated plate, in particular to a pretreatment process for a color-coated plate with high adhesion. Background technique [0002] Color-coated steel sheet (referred to as color-coated sheet) is based on metal strip steel (such as cold-rolled sheet, hot-dip galvanized sheet, aluminum-coated sheet, electro-galvanized sheet, etc.), and various polymer coatings or pasted on its surface. Products made of various plastic films. Color-coated plates have the advantages of corrosion resistance, convenient processing and forming, and beautiful appearance. Compared with traditional post-coating products, they have significant technical and cost advantages. Therefore, color-coated sheets are widely used in construction, home appliances, automobile industry and other fields. [0003] The excellent performance of the color-coated sheet depends to a large extent on the adhesion of the color-coated sheet. The b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/10B05D3/00
CPCB05D3/002B05D3/102B05D2202/10B05D2350/60
Inventor 杜蓉刘星白会平谢芬杨宏武涂元强
Owner 武汉钢铁有限公司
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