A kind of high-emissivity black anodized aluminum plate and preparation method thereof
A high-emissivity, anodized aluminum technology, applied in the direction of anodic oxidation, coating, surface reaction electrolytic coating, etc., can solve the problems of high cost of heat sink, many processes, large space, etc., to improve heat dissipation effect and simple processing technology , the effect of high emissivity
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Embodiment 1
[0038] A method for preparing high emissivity black anode aluminum plate, the steps are as follows:
[0039] (1) First, roughen one appearance surface of the aluminum plate by mechanical abrasion to make its roughness Rz reach 15μm. The aluminum plate has two appearance surfaces, and the other appearance surface is not roughened. The mechanical abrasion is made by grinding wheel. Brush method, such as figure 1 As shown, there are three groups of grinding wheels, the meshes of the three groups are 120 mesh, 240 mesh and 600 mesh, respectively, and the contact pressure between the grinding wheel and the aluminum plate is 0.5MPa;
[0040] (2) Wash and dry the roughened aluminum plate first, and then attach a plastic film coated with non-adhesive on only one side of the unroughened appearance surface of the aluminum plate, and then separate the aluminum plates in order Soak in NaOH solution, nitric acid solution and ammonium hydrogen fluoride solution to remove stains on the rough surf...
Embodiment 2
[0054] A method for preparing high emissivity black anode aluminum plate, the steps are as follows:
[0055] (1) First, roughen one appearance surface of the aluminum plate by mechanical abrasion to make its roughness Rz reach 5μm. There are two appearance surfaces of the aluminum plate, and the other appearance surface is not roughened. The mechanical abrasion adopts grinding wheel grinding. There are three groups of grinding wheels, the meshes of the three groups are 120 mesh, 240 mesh and 600 mesh respectively. The contact pressure between the grinding wheel and the aluminum plate is 0.2MPa;
[0056] (2) Wash and dry the roughened aluminum plate first, and then attach a plastic film coated with non-adhesive on only one side of the unroughened appearance surface of the aluminum plate, and then separate the aluminum plates in order Soak in NaOH solution, nitric acid solution and ammonium hydrogen fluoride solution to remove stains on the rough surface of the aluminum plate and sil...
Embodiment 3
[0061] A method for preparing high emissivity black anode aluminum plate, the steps are as follows:
[0062] (1) First, roughen one appearance surface of the aluminum plate by mechanical abrasion to make its roughness Rz reach 5μm. There are two appearance surfaces of the aluminum plate, and the other appearance surface is not roughened. The mechanical abrasion adopts grinding wheel grinding. There are three groups of grinding wheels, the meshes of the three groups are 120 mesh, 240 mesh and 600 mesh respectively, and the contact pressure between the grinding wheel and the aluminum plate is 0.8MPa;
[0063] (2) Wash and dry the roughened aluminum plate first, and then attach a plastic film coated with non-adhesive on only one side of the unroughened appearance surface of the aluminum plate, and then separate the aluminum plates in order Soak in NaOH solution, nitric acid solution and ammonium hydrogen fluoride solution to remove stains on the rough surface of the aluminum plate and...
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Abstract
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