Method for sealing micro-arc oxidation films

A technology of micro-arc oxidation and hole sealing, which is applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of destroying the ceramic texture of the micro-arc oxidation film and difficult to achieve the sealing effect of the micro-arc oxidation film, and achieve Good sealing effect

Inactive Publication Date: 2010-02-17
SHENZHEN FUTAIHONG PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different properties of the anodized film and the micro-arc oxidation film, the pore diameter is different (the pore diameter of the anodized film is nanometer, and the pore diameter of the micro-arc oxidation film is micron), it is difficult to imitate the sealing method of the anodized film. The arc oxidation film has a good sealing effect, and even destroys the unique ceramic texture of the micro-arc oxidation film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: An aluminum alloy workpiece is selected, a micro-arc oxide film is formed on the surface of the workpiece, and the surface roughness of the oxide film is 1.33 μm. Mix 30ml of ethyl orthosilicate, 280ml of absolute ethanol, 10ml of concentrated ammonia and 80ml of deionized water, then add 0.08g of fluorosilicone surfactant and stir evenly, then let it stand for 20~30 minutes to form a sol. The sol is used as a sealing agent. The workpiece is immersed in the sealing agent, and kept at room temperature (about 20° C.) for 10 to 30 minutes. Then take out the workpiece and use centrifugal separation to remove the sealing agent attached to the surface of the workpiece and its oxide film, and then bake the workpiece at 200-300°C for 30-60 minutes to solidify. After sealing, the thickness of the film formed by the sealing agent on the oxide film is 3.6 μm, the surface roughness of the oxide film after sealing is 1.28 μm, and the hardness is 880 HV. The sealed oxi...

Embodiment 2

[0010] Embodiment 2: An aluminum alloy workpiece is selected, a micro-arc oxide film is formed on the surface of the workpiece, and the surface roughness of the oxide film is 1.33 μm. Mix 35ml of tetraethyl orthosilicate, 250ml of absolute ethanol, 12ml of concentrated ammonia and 100ml of deionized water. Then add 0.16g of fluorosilicone surfactant and stir evenly, then let it stand for 20-30 minutes to form a sol. The sol is used as a sealing agent. The workpiece is immersed in the sealing agent, and kept at room temperature (about 20° C.) for 10 to 30 minutes. Then take out the workpiece and use centrifugal separation to remove the sealing agent attached to the surface of the workpiece and its oxide film, and then bake the workpiece at 200-300°C for 30-60 minutes to solidify. After sealing, the thickness of the film formed by the sealing agent on the oxide film is 4 μm, the surface roughness of the oxide film after sealing is 1.29 μm, and the hardness is 870 HV. The sealed...

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PUM

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Abstract

The invention provides a method for sealing micro-arc oxidation films. Sol containing ethyl silicate is used as a sealing agent to seal the micro-arc oxidation films.

Description

Technical field [0001] The invention relates to a method for sealing a micro-arc oxide film. Background technique [0002] Micro-arc oxidation technology (also known as plasma oxidation, anodic spark deposition, spark discharge anodic deposition and surface ceramization, etc.) is a technology that can directly grow in situ ceramic-like oxide films on metal surfaces. The ceramic oxide film produced by this technology has a good appearance and high hardness, so it is widely used in the field of surface decoration of products. In the process of forming a ceramic oxide film on the surface of a metal workpiece by using this technology, a large amount of gas is discharged from the workpiece due to high-temperature sintering. The gas passes through the oxide film formed on the surface of the workpiece when discharged, so that the oxide film forms many micropores. The existence of these many micropores makes the dirt easily penetrate into the oxide film and is not easy to wipe clean. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/18
CPCC25D11/246C25D11/026C25D11/30C25D11/26
Inventor 戴丰源姜传华罗勇达何纪壮刘伟敖旭峰
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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