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Aluminum alloy anodizing coloring treatment method

A technology of anodizing and treatment method, applied in the direction of anodizing, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of overheating of film layer, breakdown of parts, dissolution, etc., to achieve high light fastness, avoid centralized heat generation , the effect of simple process

Inactive Publication Date: 2016-04-20
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is generally believed that the CuAl2 phase dissolves quickly during the anodic oxidation process, and often becomes the center of current accumulation, which easily causes the film layer at this part to overheat and dissolve, and even burns or even breaks down the parts in severe cases.
Regarding the general anodic oxidation method in aluminum alloy surface treatment, it is difficult to further promote it on 2024 aluminum alloy due to the above-mentioned various conditions.

Method used

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  • Aluminum alloy anodizing coloring treatment method
  • Aluminum alloy anodizing coloring treatment method
  • Aluminum alloy anodizing coloring treatment method

Examples

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Effect test

Embodiment 1

[0029] Embodiment 1: An aluminum alloy anodic oxidation coloring treatment method of the present invention uses direct current, low voltage power supply loading mode, uses sulfuric acid solution as the main component of the electrolyte, adopts the method of organic dye adsorption coloring, and uses organic dye as the dyeing agent For anodizing, the specific steps are:

[0030] (1) Cut the 2024 aluminum alloy raw material into a square sample with a size of 15mm×15mm×10mm;

[0031] (2) Pretreatment: Grind sequentially with 240# to 1200# sandpaper, polish the aluminum alloy surface smooth, put it in ethanol for cleaning and degreasing treatment; apply a little polishing paste on the surface of the aluminum alloy sample, and perform mechanical polishing treatment; sequentially carry out alkali Washing, pickling, and then rinsing and drying with deionized water to obtain a clean and scratch-free aluminum alloy sample;

[0032] (3) Anodizing treatment: Anodize the aluminum alloy s...

Embodiment 2

[0036] Embodiment 2: The difference between this example and Example 1 is: in the anodizing treatment process of this example: the concentration of sulfuric acid is 150g / L, and the concentration of aluminum sulfate is 18g / L; The time is 10000s; the temperature is at normal temperature; after the treatment is completed, it is washed and dried with deionized water immediately to obtain the following Figure 1-3 The surface of the anodized aluminum film sample with high quality and crystalline structure is shown; the roughness value Ra of the anodized aluminum film is less than 0.5, which is μm.

[0037] Coloring treatment: Fully dissolve the organic dye, heat to 45°C and keep it warm, put the prepared anodized aluminum film sample into it, soak for 28 minutes to form a dyed sample, and the surface of the processed sample is dyed with various colors. The parameters of the organic dye adsorption coloring process are as follows: the dyeing solution is: X-type organic dye 3g / L; the ...

Embodiment 3

[0039] Embodiment 3: The difference between this example and Example 1 is: in the anodizing treatment process of this example: the concentration of sulfuric acid is 200g / L, and the concentration of aluminum sulfate is 10g / L; The time is 9000s; the temperature is at normal temperature; after the treatment is completed, it is washed and dried with deionized water immediately to obtain the following: Figure 1-3The surface of the anodized aluminum film sample with high quality and crystalline structure is shown; the roughness value Ra of the anodized aluminum film is less than 0.5, which is μm.

[0040] Coloring treatment: Fully dissolve the organic dye, heat to 45°C and keep it warm, put the prepared anodized aluminum film sample into it, soak for 20 minutes to form a dyed sample, and the surface of the processed sample is dyed with various colors. The parameters of the organic dye adsorption coloring process are as follows: the dyeing solution is: X-type organic dye 4g / L; the d...

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Abstract

The invention relates to an aluminum alloy anodizing coloring treatment method, and belongs to the technical field of metal materials. In the mode of direct-current low-voltage power source loading, a sulfuric acid solution is used as a main ingredient of an electrolyte, and anodizing coloring is carried out with organic dyestuff as a dyeing agent through the method of organic dyestuff adsorption coloring. The method includes the concrete steps of anodizing treatment, wherein the sulfuric acid solution electrolyte is used, a low-voltage direct-current power source is used, and the treatment is carried out at normal temperature, and after treatment is finished, deionized water washing and airing are conducted to obtain an anodised aluminum film sample surface of a crystalline state structure; coloring treatment, wherein the organic dyestuff is dissolved fully, heated to 45 DEG C and kept warm, and a prepared anodised aluminum film sample is put in the organic dyestuff, and soaked for 30 min to form a dyed sample. Heat in the treatment process is small, and concentrated heat production is effectively avoided. The prepared anodised aluminum film is of the crystalline state structure, and surface hardness, abrasive resistance and corrosion resistance are greatly improved.

Description

Technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to an aluminum alloy anodizing coloring treatment method for aluminum alloy surface treatment. Background technique [0002] Due to its low density, high specific strength, good mechanical properties, good corrosion resistance, excellent electrical and thermal conductivity, and good casting performance, aluminum alloys are widely used in the modern automobile industry, aerospace industry, electronic communications industry, and computer industry. It has a very wide range of applications in other fields. [0003] Aluminum alloy is an important engineering material. A natural oxide film can be formed on its surface under natural conditions. However, the amorphous film has a loose structure and cannot provide good corrosion resistance and cannot meet the usage requirements. This kind of oxide film formed in the natural environment has very poor weather resistance a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/24C25D11/04
CPCC25D11/04C25D11/243
Inventor 万晔张允典钱施光朱旭
Owner SHENYANG JIANZHU UNIVERSITY
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