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
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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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