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Stripping solution for aluminum alloy and stripping method thereof

A technology for stripping solution and aluminum alloy is applied to stripping solution of 7 series aluminum alloy products and the field of stripping, which can solve the problems of stripping of 7 series aluminum alloy products and unusable stripping solution, so as to reduce processing costs. , Improve the effect of rework utilization and quality improvement

Active Publication Date: 2018-10-09
AAC MICROTECH CHANGZHOU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the deplating method and deplating solution of 6 series aluminum alloys cannot be used for deplating of 7 series aluminum alloy products, the present invention provides a deplating solution and deplating method for 7 series aluminum alloy products, The deplating method has the advantages of high qualified rate of reworked products and low cost

Method used

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  • Stripping solution for aluminum alloy and stripping method thereof
  • Stripping solution for aluminum alloy and stripping method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] The content of the following components: sodium hydroxide 50g / L, sodium metaaluminate 20g / L, triethanolamine 30ml / L, ammonium chloride 30g / L, sodium thiosulfate 15g / L, sodium bicarbonate 10g / L, sulfuric acid Ammonium 15g / L, ammonium molybdate 3g / L stripping solution and the following components: inorganic acid 180g / L, molybdic acid 50g / L, potassium fluorozirconate 20g / L, organic acid 55g / L black stripping solution as an example.

[0049] First configure the deplating solution and the black stripping solution according to the component content; then immerse the aluminum alloy shell (size: length * width = 122mm * 68mm) in the deplating solution for deplating treatment, and remove the anodized film layer , there is no need to apply voltage during the deplating process, and the deplating treatment is carried out by bubbling, wherein the deplating temperature is controlled at 55°C-75°C, and the time is 50-90s. A black film is formed on the surface; then the first pure wate...

Embodiment 2

[0051] The deplating method step of this embodiment is the same as that of Example 1, and the difference from Example 1 is that the deplating solution used, the combined content of the stripping black solution are different, and the dimensions of the aluminum alloy shell are different. In the present embodiment, the component content of the deplating solution is: sodium hydroxide 55g / L, sodium metaaluminate 15g / L, triethanolamine 33ml / L, ammonium chloride 25g / L, sodium thiosulfate 19g / L, sodium bicarbonate 13g / L, ammonium sulfate 12g / L, ammonium molybdate 5g / L; The component content of described stripping black liquor is: inorganic acid 190g / L, molybdic acid 45g / L, potassium fluorozirconate 25g / L, organic acid 50g / L.

Embodiment 3

[0053] The deplating method step of this embodiment is the same as that of Example 1, and the difference from Example 1 is that the deplating solution used, the combined content of the stripping black solution are different, and the dimensions of the aluminum alloy shell are different. In the present embodiment, the component content of the deplating solution is: sodium hydroxide 60g / L, sodium metaaluminate 13g / L, triethanolamine 36ml / L, ammonium chloride 20g / L, sodium thiosulfate 22g / L, sodium bicarbonate 16g / L, ammonium sulfate 10g / L, ammonium molybdate 7g / L; The component content of described stripping black liquor is: inorganic acid 200g / L, molybdic acid 40g / L, potassium fluorozirconate 30g / L, organic acid 45g / L.

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Abstract

The invention provides stripping liquid for aluminum alloy and a stripping method of the stripping liquid. The stripping liquid comprises sodium hydroxide, sodium metaaluminate, triethanolamine, ammonium chloride, sodium thiosulfate, sodium bicarbonate, ammonium sulfate, ammonium molybdate and copper sulfate, the content of the sodium hydroxide is 50g / L-75g / L, the content of the sodium metaaluminate is 5g / L-20g / L, the content of the triethanolamine is 30 ml / L-45 ml / L, the content of the ammonium chloride is 15 g / L-30 g / L, the content of the sodium thiosulfate is 15 g / L-30 g / L, the content of the sodium bicarbonate is 10 g / L-25 g / L, the content of the ammonium sulfate is 5 g / L-15 g / L, and the content of the ammonium molybdate is 3 g / L-10 g / L. The formula of the stripping liquid is adjusted, the triethanolamine, the sodium thiosulfate, the ammonium sulfate, the ammonium molybdate and the copper sulfate are added in the new formula and are used as active negative ions and inhibitors, reaction rate is controlled, the corroded degree of aluminum is reduced, and the quality of reworked products and rework utilization rate are improved.

Description

【Technical field】 [0001] The invention relates to the technical field of aluminum alloy deplating, in particular to a deplating solution for 7 series aluminum alloy products and a deplating method thereof. 【Background technique】 [0002] Compared with 6-series aluminum alloys, the zinc content of 7-series aluminum alloys is generally higher than that of 6-series aluminum alloys. The increase in zinc content has the advantage of significantly improving the mechanical properties of 7-series aluminum alloys. The disadvantages are Since the 7-series aluminum alloy contains high active metal elements such as zinc, copper and iron, the 7-series aluminum alloy is more likely to be corroded. After the anodizing process of 7-series aluminum alloy products, some products may be unqualified due to improper operation of anodizing, cleaning, sealing, coloring process or other reasons, and need to be removed and re-anodized to achieve Product quality requirements. [0003] Because of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/36C25D11/16
CPCC23F1/36C25D11/16
Inventor 郑明峰严绪东王煊
Owner AAC MICROTECH CHANGZHOU
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