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Bronze coloring process of pack alloy

A cast aluminum alloy, bronze-colored technology, applied in electrolytic coatings, surface reaction electrolytic coatings, anodic oxidation, etc., can solve the problems of containing many alloy elements, difficult to color treatment, difficult to form a film layer, etc.

Inactive Publication Date: 2008-07-09
JIANGHAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above materials, it is not mentioned that the coloring object is die-casting aluminum alloy. As a type of aluminum alloy, die-casting aluminum alloy contains more alloying elements, and it is difficult to carry out coloring treatment, and it is difficult to form a good and stable film layer.

Method used

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  • Bronze coloring process of pack alloy
  • Bronze coloring process of pack alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This embodiment includes pretreatment, anodic oxidation, coloring process and subsequent sealing process. The pretreatment process includes a passivation process.

[0016] The passivation process refers to the mechanically polished or chemically polished die-casting aluminum alloys that are degreased and cleaned directly in concentrated HNO at room temperature. 3 Soak in the middle for 5-10 minutes to get the natural color and form a dense passivation film on the surface to improve its corrosion resistance. For the general process, see figure 1 .

[0017] After the passivated die-casting aluminum alloy is degreased and cleaned, it is anodized, colored and sealed to obtain the required bright color with good corrosion resistance. For the general process, see figure 2 .

[0018] Anodizing solution formula: H 2 SO 4 180-220g / L, the rest is water.

[0019] Anodizing process conditions: temperature: 5-20°C, voltage: 8-18V, current density: 0.8-1.5A / dm 2 , Time: de...

Embodiment 2

[0028] This example is basically the same as Example 1, except that the formula of the coloring solution is: Alizarin yellow R: 0.6g / L, acid blue: 5g / L, glacial acetic acid: 0.4g / L, and the balance is water.

Embodiment 3

[0029] Embodiment 3: This embodiment is basically the same as Embodiment 1, except that the coloring solution formula is: Alizarin yellow R 0.9g / L, acid Yuanqing 10g / L, glacial acetic acid 0.8g / L, and the balance is water.

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Abstract

A coloring process of bronze for diecasting aluminium alloys containing pre-process, oxidizing on positive pole and coloring in bronze solvent. Dispensation of bronze solvent is alizarin yellow R 0.1-0.9g / L, acidic green material 1-10 g / L, HAc 0.1-0.8 g / L, other H2O. The process can improve surface property of alloy. Brightness doesn't change after neutral salt spray test for 48h.

Description

technical field [0001] The invention discloses a die-casting aluminum alloy bronze coloring process, and in particular relates to the cleaning process, anodic oxidation process, coloring process and subsequent treatment of the die-casting aluminum alloy before coloring. Background technique [0002] Coloring treatment of certain colorable die-casting aluminum alloys can improve the surface properties of the aluminum alloy products, including corrosion resistance, electrical insulation, surface hardness, etc. At the same time, it can also play a decorative role and make the aluminum alloy products beautiful , bright. [0003] The bronze coloring method for aluminum alloys has been introduced in relevant patent materials, such as: patent application number 85100313, which introduces a method of bronze coloring aluminum and aluminum alloys by vapor phase coloring; patent application number 89105774.9 , introduced a method using DC anodizing, AC electrolytic coloring. The comp...

Claims

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Application Information

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IPC IPC(8): C25D11/24C25D11/18C25D11/04C25D11/34
Inventor 冯俊冯洁
Owner JIANGHAN UNIVERSITY
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