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Composite coloration method of aluminium anode oxide film

A composite coloring, aluminum anode technology, used in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of monotonous color, poor light resistance, easy fading, etc. Ease of maintenance and easy process operation

Active Publication Date: 2007-02-28
TAISHAN CITY KAM KIU ALUMINUM EXTRUSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, the overall coloring is to add colored substances to the aluminum anodic oxidation solution or use a special electrolyte to obtain a colored oxide film. This aluminum anodic oxidation film coloring method has the disadvantage of dark color
Electrolytic coloring is the secondary electrolysis of the aluminum anodized film in a solution containing metal salts. Under the action of an electric field, the metal ions are reduced and deposited at the bottom of the film pores of the aluminum anodized film, so that the aluminum anodized film is colored. The colored film layer obtained by this method has good corrosion resistance and is mainly used for outdoor decoration materials, but it has the disadvantage of monotonous color
Chemical dyeing is to immerse the aluminum anodized film in a water-soluble dye or coloring salt solution for dyeing to obtain a colored film layer. In this method, the larger dye molecules can only enter the surface layer of the film pores, so although the obtained colored film The layer is colorful, but it is easy to wipe off, has poor light fastness, and is easy to fade. It is usually only used as an interior decoration material

Method used

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  • Composite coloration method of aluminium anode oxide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Aluminum surface pretreatment: conventional aluminum metal surface pretreatment process.

[0020] Oxidation film formation on the surface of aluminum: take the pre-treated clean aluminum piece as the anode, and immerse it in the electrolyte of 170 g / L sulfuric acid solution, and treat it for 60 minutes at a working voltage of 20 volts and an electrolysis temperature of 21 °C to make the aluminum surface get Suitable for compound colored anodized coatings.

[0021] Deposition of metal salts in the pores of the film: Rinse the film-formed aluminum piece with water, then immerse it in a pre-configured 13 g / L stannous sulfate solution, and the electrolytic coloring time is 30 seconds.

[0022] Dye molecules enter the film pores: Rinse the electrolytically colored aluminum piece with water, then immerse it in a pre-configured 0.5 g / L acid dye solution for 3 minutes to obtain a composite colored aluminum piece.

[0023] Sealing treatment: immerse in the blocking solution at ...

Embodiment 2

[0025] Aluminum surface pretreatment: conventional aluminum metal surface pretreatment process.

[0026] Oxidation film formation on the surface of aluminum: take the pre-treated clean aluminum piece as an anode, and immerse it in the electrolyte of 200 g / L sulfuric acid solution, treat it for 30 minutes at a working voltage of 12 volts, and an electrolysis temperature of 18 ° C, so that the aluminum surface can be obtained Suitable for compound colored anodized coatings.

[0027] Deposition of metal salts in film pores: Rinse film-formed aluminum parts with water, then immerse in pre-configured 18 g / L stannous sulfate solution, electrolytic coloring time is 3 minutes.

[0028] Dye molecules enter the membrane pores: Rinse the electrolytically colored aluminum piece with water, then immerse it in a pre-configured 3 g / L direct dye solution for 15 minutes to obtain a composite colored aluminum piece.

[0029] Sealing treatment: immerse in the blocking solution at a temperature ...

Embodiment 3

[0031] Aluminum surface pretreatment: conventional aluminum metal surface pretreatment process.

[0032] Oxidation film formation on the surface of aluminum: take the pre-treated clean aluminum piece as the anode, and immerse it in the electrolyte of 180 g / L sulfuric acid solution, and treat it for 40 minutes at a working voltage of 18 volts and an electrolysis temperature of 20 ° C to make the aluminum surface get Anodized film suitable for composite coloring

[0033] Deposition of metal salts in film pores: Rinse film-formed aluminum parts with water, then immerse in pre-configured 14 g / L stannous sulfate solution, electrolytic coloring time is 60 seconds.

[0034] Dye molecules enter the membrane pores: Rinse the electrolytically colored aluminum piece with water, then immerse it in a pre-configured 1.5 g / L acid dye solution for 8 minutes to obtain a composite colored aluminum piece.

[0035] Sealing treatment: immerse in the blocking solution at a temperature of 60-65°C f...

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Abstract

The invention discloses the composite coloration method for aluminum anodized film, comprising the following steps: 1 making the aluminum anodized film; 2 electrolyzation coloration, soaking into the electrolyzation coloration solution with metal salt, making metal salt deposit in the aluminum anodized film; 3 chemistry dyeing, making organic dye molecule enter into aluminum anodized film; 4 enclosing. The invention gets the colored film which has good corrosion resisting property, light resistance and decorative effect. The invention has the advantages of simple operation and easy production condition.

Description

technical field [0001] The invention relates to a method for coloring an object through a chemical composite reaction, in particular to a method for coloring an aluminum anodized film through electrolytic coloring and then chemical dyeing in the film pores of the aluminum anodized film. Background technique [0002] The main methods of coloring aluminum anodized film are: overall coloring, electrolytic coloring and chemical coloring. [0003] The overall coloring is to add colored substances to the aluminum anodic oxidation solution or use a special electrolyte to obtain a colored oxide film. This aluminum anodic oxidation film coloring method has the disadvantage of dark color. Electrolytic coloring is the secondary electrolysis of the aluminum anodized film in a solution containing metal salts. Under the action of an electric field, the metal ions are reduced and deposited at the bottom of the film pores of the aluminum anodized film, so that the aluminum anodized film is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/22
Inventor 杨翠颜周超彦梁瑞霞
Owner TAISHAN CITY KAM KIU ALUMINUM EXTRUSION
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