A kind of aluminum alloy mirror surface anodic oxidation method
An anodic oxidation, aluminum alloy technology, applied in the direction of anodic oxidation, surface reaction electrolytic coating, coating, etc., can solve the problems of fast dissolution of oxide film, high current density, and inability to achieve mirror effect, etc., to achieve anodic oxidation process The effect of optimization and improvement of anode surface quality
Active Publication Date: 2021-06-22
CHINALCO RUIMIN +1
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Problems solved by technology
Due to the high oxidation voltage, high current density, fast dissolution rate of the oxide film and large pores of the oxide film, the oxide film formed on the surface of the aluminum part is matte, which cannot effectively guarantee the mirror effect of the aluminum alloy.
Mirror panels use this method to anodize the panel surface to reduce the gloss, and the mirror effect cannot be achieved
Method used
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Embodiment 1
[0026] A method for anodizing an aluminum alloy mirror surface, comprising the following steps:
[0027] 1) Pretreatment before the anode: Put the aluminum alloy plate into a sulfuric acid tank with a concentration of 300~350g / L for pickling, and then put it into a water pool for cleaning;
[0028] 2) Put the cleaned aluminum alloy plate into the electrolyte and confirm the concentration and temperature of the electrolyte: it is a mixed aqueous solution of sulfuric acid, glycerol and aluminum sulfate: the mass concentration of sulfuric acid is 150-200g / L, the volume of glycerol The concentration is 1-2g / L, and the mass concentration of aluminum sulfate is 2-15g / L; the anodic oxidation is carried out by increasing the voltage gradually, and the voltage is 3 V for 5 minutes, then the voltage is 5 V for 5 minutes, and the voltage is 9 V for 40 minutes. ;Electrolyte temperature: 10±2℃ control;
[0029] 3) Put the anodized sheet into normal temperature water for washing, and then ...
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Abstract
The invention relates to a method for anodizing an aluminum alloy mirror surface, comprising the following steps: putting the aluminum alloy plate into a sulfuric acid tank for pickling, then putting it into a water pool for cleaning, putting the cleaned aluminum alloy plate into an electrolyte, The anodic oxidation is carried out by adopting the method of gradient increasing voltage, and then the product is washed with water, sealed, and cooled, and finally an anodized film close to the mirror effect is obtained. Compared with the anodic oxidation of traditional aluminum materials, the anodic oxidation method of the present invention does not need to modify and adjust the bath and anode equipment, and does not need to use high-purity aluminum materials to make aluminum substrates, and through the optimization of the anodic oxidation process, the low cost The use of aluminum with general purity and surface roughness under certain conditions can quickly achieve a substantial improvement in the quality of the anode surface.
Description
technical field [0001] The patented technology of the invention relates to a method for anodizing the mirror surface of aluminum alloy, which belongs to the technical field of anodizing of aluminum. Background technique [0002] The application of anodic mirror aluminum plate is very extensive, and it is widely used in the fields of lighting reflector and lamp decoration, solar heat collection reflective material, interior building decoration, exterior wall decoration, household appliance panel, interior and exterior decoration of automobiles, etc. There are generally two factors that affect the appearance of the mirror anodized aluminum plate. One is that the base material itself should be close to the mirror surface with low roughness before anodizing. The oxide film should be highly pure and transparent, but in order to meet the above requirements, it will increase the high cost of polishing and the use of high-purity aluminum. [0003] The inventors have found through r...
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IPC IPC(8): C25D11/08
CPCC25D11/024C25D11/08
Inventor 郭振武江钟宇兰政游俊雄林盛
Owner CHINALCO RUIMIN