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Aluminum alloy surface treatment method and aluminum product

A surface treatment, aluminum alloy technology, applied in the field of aluminum products, can solve the problems of low silicon content, inability to effectively improve the uniformity of aluminum alloy coloring, uneven distribution of silicon, etc.

Inactive Publication Date: 2014-05-14
SHENZHEN FUTAIHONG PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the distribution of silicon in the aluminum alloy is not uniform, and the silicon content in the surface area of ​​the aluminum alloy is usually low, although the silicon in the surface layer can be removed after pickling, the total silicon content in the aluminum alloy after pickling content is still high
Therefore, the existing pickling treatment cannot effectively improve the uniformity of aluminum alloy coloring after anodic treatment

Method used

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  • Aluminum alloy surface treatment method and aluminum product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Ultrasonic cleaning: the aluminum alloy substrate 10 is ultrasonically cleaned with absolute ethanol for about 30 minutes.

[0041] (2) Air-drying treatment: using a blower, adjusting the angle of the blower to 30°, and air-drying the aluminum alloy substrate 10 after the ultrasonic cleaning treatment. The air drying was carried out at room temperature for 2 minutes.

[0042] (3) Solution treatment: the aluminum alloy substrate 10 was placed in a box-type resistance furnace at a temperature of 525° C. for 8 hours.

[0043](4) Quenching treatment: within 5 seconds after taking out the aluminum alloy substrate 10 , put it into water at a temperature of 20° C. for quenching treatment. The time of the quenching treatment is 5 minutes.

[0044] (5) Pickling treatment: Prepare pickling solution, wherein the volume percentage of nitric acid and hydrofluoric acid in the pickling solution is 8:1. The quenched aluminum alloy substrate 10 is immersed in the pickling solutio...

Embodiment 2

[0051] (1) Ultrasonic cleaning: Ultrasonic cleaning is performed on the aluminum alloy substrate with absolute ethanol for about 30 minutes.

[0052] (2) Air-drying treatment: using a blower, adjusting the angle of the blower to 50°, and air-drying the aluminum alloy substrate after ultrasonic cleaning. The air drying was carried out at room temperature for 2 minutes.

[0053] (3) Solution treatment: the aluminum alloy substrate was placed in a box-type resistance furnace at a temperature of 510° C. for 9 hours.

[0054] (4) Quenching treatment: within 5 seconds after taking out the aluminum alloy base material, place it in water at 15° C. for quenching treatment. The time of the quenching treatment is 5 minutes.

[0055] (5) Pickling treatment: Prepare pickling solution, wherein the volume percentage of nitric acid and hydrofluoric acid in the pickling solution is 10:1.5. The quenched aluminum alloy substrate is immersed in the pickling solution for 5 minutes. The picklin...

Embodiment 3

[0062] (1) Ultrasonic cleaning: Ultrasonic cleaning is performed on the aluminum alloy substrate with absolute ethanol for about 30 minutes.

[0063] (2) Air-drying treatment: using a blower, adjusting the angle of the blower to 60°, and air-drying the aluminum alloy substrate after ultrasonic cleaning. The air drying was carried out at room temperature for 3 minutes.

[0064] (3) Solution treatment: the aluminum alloy substrate was placed in a box-type resistance furnace at a temperature of 495° C. for 10 hours.

[0065] (4) Quenching treatment: within 5 seconds after taking out the aluminum alloy base material, put it into water at 20° C. for quenching treatment. The time of the quenching treatment is 5 minutes.

[0066] (5) Pickling treatment: Prepare pickling solution, wherein the volume percentage of nitric acid and hydrofluoric acid in the pickling solution is 9:1. The quenched aluminum alloy substrate is immersed in the pickling solution for 10 minutes. The pickling...

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Abstract

The invention provides an aluminum alloy surface treatment method. The aluminum alloy surface treatment method comprises the following steps of providing an aluminum alloy base material, carrying out solid solution treatment on the aluminum alloy base material so that a silicon element is uniformly dispersed in the aluminum alloy base material, carrying out pickling treatment on the aluminum alloy base material to remove the silicon on the surface of the aluminum alloy base material, carrying out anodic oxidation treatment on the aluminum alloy base material so that a porous alumina membrane is formed on the aluminum alloy base material, carrying out coloring treatment on the aluminum alloy base material, and carrying out aperture-sealing treatment on the aluminum alloy base material so that an alumina monohydrate layer is formed on the porous alumina membrane. The invention provides an aluminum product obtained by the aluminum alloy surface treatment method.

Description

[0001] Technical Field The present invention relates to a method for surface treatment of aluminum alloys and the aluminum products produced by the method. Background technique [0002] Aluminum alloy has the advantages of good die-casting processing performance, high mechanical strength, and corrosion resistance, and is widely used in machinery manufacturing, instrumentation, automobiles, and decorative accessories. [0003] However, the aluminum alloy contains more silicon elements, and after the aluminum alloy is colored, the presence of silicon elements will lead to uneven coloring. [0004] At present, in order to improve the color uniformity of the aluminum alloy surface after the coloring treatment, the aluminum alloy is firstly pickled, but generally only the silicon element on the surface of the aluminum alloy can be removed by the pickling method. However, since the distribution of silicon in the aluminum alloy is not uniform, and the silicon content in the surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25D11/08C25D11/18B32B15/04B32B9/04
CPCC25D11/04C25D11/08C25D11/16C25D11/243C25D11/246
Inventor 熊承阳周书祥廖凯荣
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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