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A kind of two-color anodic oxidation method of aluminum alloy surface

An aluminum alloy surface, anodic oxidation technology, applied in the direction of surface reaction electrolytic coating, coating, electrolytic coating, etc., can solve the problems of easy generation of impurities, dust spots, inconsistent surface rough texture, complex curved surface 3D structure cannot be realized, etc.

Inactive Publication Date: 2018-12-04
SHENZHEN TINNO WIRELESS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect obtained by this process is that the highlight and the sandblasted surface are distinguished, and the rough texture of the surface is inconsistent. It is difficult to achieve two color effects on the same sandblasted surface at the same time, and the 3D structure of complex curved surfaces cannot be realized.
Although there is also a method of printing dyes by masking with jigs, this method will produce jagged burrs at the edges of the masking, and at the same time, the printed dyes are prone to unevenness when immersed in the oxide film layer, and the consistency is not good; the process of printing dyes It is easy to produce impurities and dust spots, and the 3D structure of complex curved surfaces cannot be realized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The aluminum alloy structural part itself has a non-conductive potential, which divides the structural part into two parts:

[0051] First, the non-conductive position between the two parts is injected into the mold and filled with non-conductive material polyethylene resin to separate the two parts; the part of the aluminum alloy structural part that needs to be anodized for the first time is anodized for the first time. anodizing;

[0052] The conditions for the first anodization are: the voltage of anodization is 12V, and the current density is 1.0A / mm 2 , the mass percentage of sulfuric acid solution is 180g / L, and the anodic oxidation time is 30 minutes;

[0053] Then, the non-conductive material is removed by using a numerical control tool, and the second anodic oxidation is performed on the aluminum alloy structural parts anodized in the second color;

[0054] The conditions for the second anodization are: the voltage of anodization is 11V, and the current dens...

Embodiment 2

[0056] Aluminum alloy structural parts themselves do not have a non-conductive potential:

[0057] First, make a design to set a groove between the aluminum alloy structural part anodized in the first color and the aluminum alloy structural part anodized in the second color; fill the non-conductive material polyamide resin in the groove by dispensing, so that Separate the two parts; perform the first anodizing on the part of the aluminum alloy structural part that needs to be anodized for the first time;

[0058] The conditions for the first anodization are: the voltage of anodization is 13V, and the current density is 1.0A / mm 2 , the mass percentage of sulfuric acid solution is 200g / L, and the anodic oxidation time is 35 minutes;

[0059] Then use laser laser cutting to remove the non-conductive material, and perform second anodizing on the aluminum alloy structural parts anodized in the second color;

[0060] The conditions for the second anodization are: the voltage of an...

Embodiment 3

[0062] First, the mechanical pretreatment of the aluminum alloy structural parts by polishing and sandblasting.

[0063] Polishing: Apply the polishing paste to the soft cloth wheel or felt wheel and use mechanical rotation to rub the soft cloth wheel or felt wheel on the surface of the aluminum alloy structural parts. First rough polishing and then fine polishing. Select a semi-automatic or full-automatic polishing machine according to needs.

[0064] Sandblasting: Spray dry sand or other abrasive grains on the surface of aluminum products with compressed air to remove surface defects and present a uniform and matte sand surface.

[0065] Then, perform acid degreasing on the aluminum alloy structural parts, wherein: the phosphoric acid content is 25g / L, the sulfuric acid content is 5g / L, and the acid degreasing time is 3 minutes.

[0066] Finally, the two-color anodic dyeing was carried out according to the method in Example 1.

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Abstract

The invention relates to the technical field of aluminum alloy treatment processes, in particular to a bi-color anodic oxidation method for aluminum alloy surfaces. Aluminum alloy structural parts needing first-color anodic oxidation communicate with one another and are separated from aluminum alloy structural parts needing second-color anodic oxidation through non-conductive materials, and then anodic oxidation is carried out for the first time; the non-conductive materials are removed, the aluminum alloy structural parts needing second-color anodic oxidation communicate with one another, and then anodic oxidation is carried out for the second time. According to the method, through different areas in communication on the structural parts, anodic oxidation dyeing is carried out for realizing the bi-color oxidation effect, and the process with the bi-color appearance effect can be realized on the aluminum alloy surfaces with complex curved surfaces and 3D structures.

Description

technical field [0001] The present application relates to the technical field of aluminum alloy treatment technology, in particular, to a method for two-color anodic oxidation on the surface of aluminum alloy. Background technique [0002] Anodizing is the most commonly used surface treatment process for aluminum alloys, but the current anodizing and dyeing methods for aluminum alloys are single, and the color effect is monotonous. Although there is currently a two-color anodic oxidation process that utilizes primary oxidation to cut the oxidized surface layer with a CNC tool, and then performs secondary anodic oxidation on the cut surface layer. However, the effect obtained by this process is that the highlight and the sandblasted surface are distinguished, and the rough texture of the surface is inconsistent. It is difficult to achieve two color effects on the same sandblasted surface at the same time, and the 3D structure of complex curved surfaces cannot be realized. . ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/12C25D11/14
CPCC25D11/022C25D11/12C25D11/14
Inventor 陈颖林圣董小林
Owner SHENZHEN TINNO WIRELESS TECH
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