Aluminum alloy anodization and electrolytic coloring sealing technology
An anodizing and electrolytic coloring technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of poor wear resistance and corrosion resistance on the surface of the oxide film, clean environment pollution, high cost, and achieve low cost. , the effect of low pollution and low cost
Active Publication Date: 2014-09-10
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology
However, in some scientific research fields (such as inertial confinement fusion, aerospace, etc.) that have strict requirements on the cleanliness of the workpiece surface, most of the above-mentioned closed processes cannot meet the requirements
When the sealed parts are wiped with alcohol, there will be a lot of discoloration, and the wear resistance and corrosion resistance of the surface of the oxide film are poor, which is easy to pollute the clean environment
The cost of individual processes that can meet the requirements is very high, dozens of times that of ordinary processes
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] The invention provides a sealing process for anodic oxidation and electrolytic coloring of aluminum alloys. The sealing process also belongs to hot water sealing. The specific process is as follows:
[0024] According to the size of the workpiece, add hot water with a temperature not lower than 80°C (for example, 80°C-100°C) in a suitable size container (plastic, metal) (water quality: tap water); or add ordinary tap water and heat to 80°C, then Turn off heat.
[0025] Put the oxidized and dyed workpiece into the hot water container. The hot water should cover the workpiece. The volume ratio of hot water to workpiece should be greater than 5:1, so as to ensure that the water temperature will not drop rapidly after adding the parts. Before placing, check that there is no oil, colloid and other viscous impurities on the surface of the workpiece.
[0026] Cover the container with a foam board or a thick plastic film, place it at a room temperature of 20°C, and let the con...
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The invention relates to an aluminum alloy anodization and electrolytic coloring sealing technology. The technology comprises the following steps: 1, selecting a container according to the size of a workpiece to be sealed, and adding hot water with the temperature of 80DEG C or higher into the container, wherein a ratio of the volume of the hot water to the solid volume of the workpiece to be sealed is not less than 5:1; 2, placing the workpiece to be sealed in the hot water to make the surface of the hot water is higher than the workpiece to be sealed; 3, covering the container, placing the covered container at room temperature not higher than 20DEG C, and naturally cooling the container until the temperature of the hot water in the container decreases or is close to room temperature; and 4, taking out the workpiece to be sealed, and naturally air-drying. The aluminum alloy anodization and electrolytic coloring sealing technology has the advantages of simple process, low cost and no pollution.
Description
technical field [0001] The invention belongs to the field of metal surface treatment, and relates to a sealing process of anodic oxidation and electrolytic coloring of aluminum alloys, in particular to a heat sealing process after anodic oxidation and electrolytic coloring of the surface of aluminum and aluminum alloys. Background technique [0002] Aluminum and aluminum alloys have been widely used because of their superior material properties. At the same time, the decoration and protection technology of the material surface has also been developed rapidly. Among these surface protection technologies, the most commonly used ones are anodic oxidation and electrolytic coloring processes on the surface of materials. [0003] The physical process of anodic oxidation is mainly: aluminum or aluminum alloy is placed in an acidic (sulfuric acid or chromic acid, etc.) anodic oxidation solution, an oxidation reaction occurs, and an oxide film (Al 2 o 3 ). The surface layer of the...
Claims
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IPC IPC(8): C25D11/22
Inventor 闫亚东王峰何俊华
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI