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Method for extinction electrophoresis of aluminum alloy section

An aluminum alloy profile and photoelectric technology, applied in the field of electrochemistry, can solve problems such as photochemical pollution, and achieve the effect of improving corrosion resistance and strength

Inactive Publication Date: 2015-04-29
常熟市长发铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The surface of aluminum alloy is relatively smooth, which is easy to reflect light and produce photochemical pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a method for electrophoretic extinction of aluminum alloy profiles, which includes the following steps in sequence:

[0025] (a) (a1) Immerse the aluminum alloy profile in a sulfuric acid solution with a concentration of 1mol / L at 10°C for 1 minute;

[0026] (a2) Then immerse the aluminum alloy profile in sodium hydroxide with a concentration of 1mol / L at 10°C for 1 minute;

[0027] (a3) Next, the aluminum alloy profile is immersed in deionized water at 10° C. for washing.

[0028] (b) Carry out anodic oxidation on the aluminum alloy profile that has been degreased, and form an oxide film on its surface;

[0029] (c) Immerse the anodized aluminum alloy profile in a solution containing nickel sulfate and stannous sulfate, and energize and color it; the concentration of nickel sulfate is 20g / L, and the concentration of stannous sulfate is 8g / L; The stannous solution also includes 15g / L sulfuric acid, its pH is 0.8, and the temperature is 15°C; t...

Embodiment 2

[0036] This embodiment provides a method for electrophoretic extinction of aluminum alloy profiles, which includes the following steps in sequence:

[0037] (a) (a1) Immerse the aluminum alloy profile in a sulfuric acid solution with a concentration of 0.05mol / L at 30°C for 5 minutes;

[0038] (a2) Then immerse the aluminum alloy profile in sodium hydroxide with a concentration of 0.05mol / L at 30°C for 5 minutes;

[0039] (a3) Next, the aluminum alloy profile is immersed in deionized water at 30° C. for washing.

[0040] (b) Carry out anodic oxidation on the aluminum alloy profile that has been degreased, and form an oxide film on its surface;

[0041] (c) Immerse the anodized aluminum alloy profile in a solution containing nickel sulfate and stannous sulfate, and energize and color it; the concentration of nickel sulfate is 30g / L, and the concentration of stannous sulfate is 10g / L; The stannous solution also includes 25 g / L sulfuric acid, the pH is 1.2, the temperature is 2...

Embodiment 3

[0048] This embodiment provides a method for electrophoretic extinction of aluminum alloy profiles, which includes the following steps in sequence:

[0049] (a) (a1) Immerse the aluminum alloy profile in a sulfuric acid solution with a concentration of 0.5mol / L at 20°C for 3 minutes;

[0050] (a2) Then immerse the aluminum alloy profile in sodium hydroxide with a concentration of 0.5mol / L at 20°C for 3 minutes;

[0051] (a3) Next, the aluminum alloy profile is immersed in deionized water at 20° C. for washing.

[0052] (b) Carry out anodic oxidation on the aluminum alloy profile that has been degreased, and form an oxide film on its surface;

[0053] (c) Immerse the anodized aluminum alloy profile in a solution containing nickel sulfate and stannous sulfate, and energize and color it; the concentration of nickel sulfate is 25g / L, and the concentration of stannous sulfate is 9g / L; it contains nickel sulfate and stannous sulfate The stannous solution also includes 20 g / L sulfu...

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PUM

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Abstract

The invention relates to a method for extinction electrophoresis of an aluminum alloy section. The method comprises the following steps: (a) soaking the aluminum alloy section into an acid solution, an alkaline solution and water in sequence to remove grease on the surface; (b) performing anodic oxidation on the aluminum alloy section without the grease to from an oxide film on the surface of the aluminum alloy section; (c) soaking the aluminum alloy section after the anodic oxidation into a solution containing nickel sulfate and stannous sulfate, and electrifying for coloring; (d) soaking the colored aluminum alloy section into electrophoretic paint, and electrifying for electrophoresis; and (e) heating the aluminum alloy section after electrophoresis at 170-220 DEG C for 10-50 minutes. The aluminum alloy section after the anodic oxidation is soaked into the solution containing nickel sulfate and stannous sulfate to perform electrified coloring, so that a black extinction film layer can be formed on the surface of the aluminum alloy section, thereby avoiding light pollution generated by formation of an aluminum alloy.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to an aluminum alloy profile extinction electrophoresis method. Background technique [0002] Aluminum alloy is an extended product of pure aluminum, which has a low density (ρ=2.7g / m 3 ), which is about 1 / 3 of that of iron, and has a low melting point, about 660°C. Aluminum has a face-centered cubic structure, so it has high plasticity (δ: 32~40%, ψ: 70~90%), so It is easy to process, can be made into various profiles and plates, and has good corrosion resistance. [0003] The surface of aluminum alloy is relatively smooth, which is easy to reflect light and produce photochemical pollution. Electrophoretic paint film is a commonly used matting method, which has the advantages of full, uniform, smooth and smooth coating, and the hardness, adhesion, corrosion resistance, impact performance and permeability of electrophoretic paint film are obviously better than other co...

Claims

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Application Information

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IPC IPC(8): C25D13/00
Inventor 蒋剑飞
Owner 常熟市长发铝业有限公司
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