Aluminum alloy surface treatment method and photosensitive color-change aluminum alloy obtained by same

A photosensitive discoloration and surface treatment technology, applied in the direction of surface reaction electrolytic coating, anodic oxidation, electrolytic coating, etc., can solve the problems of photosensitive discoloration on the surface of aluminum alloy

Inactive Publication Date: 2016-12-07
SHENZHEN TINNO WIRELESS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Anodic oxidation is the most commonly used surface treatment process for aluminum and aluminum alloys, but the currently common

Method used

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  • Aluminum alloy surface treatment method and photosensitive color-change aluminum alloy obtained by same
  • Aluminum alloy surface treatment method and photosensitive color-change aluminum alloy obtained by same
  • Aluminum alloy surface treatment method and photosensitive color-change aluminum alloy obtained by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0061] Anodizing of aluminum parts that have been mechanically pretreated and pre-anodized. Sulfuric acid is used as the electrolyte, wherein the sulfuric acid concentration is 150-200g / L. The voltage of anodizing is 11-13V, and the current density is 0.8-1.0A / mm 2 , the temperature of the anodizing tank is 18-22°C, and the anodizing time is 30-40min. The experimental parameters of anodic oxidation in Examples 1-4 are shown in Table 1.

[0062] Table 1

[0063] Example

Sulfuric acid concentration

Voltage

current density

Tank temperature

time

Example 1

150g / L

11V

0.8A / mm 2

18℃

30min

Example 2

170g / L

12V

0.9A / mm 2

20℃

35min

Example 3

200g / L

13V

1.0A / mm 2

20℃

40min

Example 4

200g / L

13V

1.0A / mm 2

22℃

40min

[0064] Next, the anodized aluminum parts are filled with photochromic powder. The photochromic powder N-butyl-6-nitrospiropyran is ...

Embodiment 5

[0074] The biheterocyclic ethylene compound is selected as the photochromic material, and its chemical formula is shown in formula I, M 1 and M 2 Both are 2-methylindolyl, and other experimental procedures are the same as in Example 1. The obtained photochromic aluminum alloy has similar discoloration performance and layered structure, and will not be repeated here.

[0075]

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Abstract

The invention relates to the technical field of aluminum alloy surface treatment, in particular to an aluminum alloy surface treatment method and a photosensitive color-change aluminum alloy workpiece obtained by the same. The aluminum alloy surface treatment method at least comprises the following steps that 1, the aluminum alloy workpiece is subjected to anodic oxidation, so that a porous alumina film layer is generated on the surface of the aluminum alloy workpiece; 2, the aluminum alloy workpiece subjected to anodic oxidation is subjected to photosensitive color-change material filling, so that the porous alumina film layer is filled with a photosensitive color-change material; 3, the aluminum alloy workpiece subjected to photosensitive color-change material filling is dyed; and 4, the dyed aluminum alloy workpiece is subjected to hole sealing. According to the aluminum alloy surface treatment method, the photosensitive color-change function and appearance effect of the aluminum alloy surface are achieved, and the appearance competitiveness of aluminum alloy materials is effectively improved.

Description

technical field [0001] The present application relates to the technical field of surface treatment of aluminum alloys, in particular, to a method for surface treatment of aluminum alloys and a photochromic aluminum alloy workpiece obtained by the method. Background technique [0002] Oxidize aluminum or aluminum alloy in acidic solution and appropriate voltage to obtain porous anodic aluminum oxide film. Its production process generally includes: mechanical polishing - chemical treatment to remove copper components on the surface of some alloys - cleaning and degreasing (for parts that have been anodized, if re-anodization is required, use alkali or special agents to remove the original anodization surface layer)—put it into dilute sulfuric acid as an anode for electrification to generate a porous oxide layer on the surface (a white translucent film)—dyeing—fixation (heating or closing the pores of the surface oxide layer with chromate solution) . [0003] Among aluminum s...

Claims

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Application Information

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IPC IPC(8): C25D11/08C25D11/24
CPCC25D11/08C25D11/243C25D11/246
Inventor 陈颖董小林
Owner SHENZHEN TINNO WIRELESS TECH
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