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Aluminum plate; Aluminous model board, and honeycomb panel of anodic oxidation process should pay attention to what problem?
aluminum plate; Aluminum plastic board, and honeycomb panel of anodic oxidation process should pay attention to what problem? For aluminum plate; Aluminum plastic board, and honeycomb panel of anodic oxidation treatment, the uniformity of anodic oxidation film thickness should be paid attention to; Color uniformity and reproducibility. And to ensure that the anode oxidation film thickness uniformity; Color uniformity and reproducibility, it must be strictly control the chemical composition of aluminum alloy and production technology of anodic oxidation. 1; Strict control of casting production process. The chemical composition of ingot casting control must be as small as possible, and the chemical composition must be uniform. In addition, the melting process; Casting process and homogenizing treatment must be strictly implemented. 2; Choose appropriate jig. Pack hanging fixture materials must ensure that the electric conductivity is good, the general selection of copper or copper alloy fixture. Has been used in special or general labor used again when fixtures such as anodic oxidation treatment, must remove the surface oxide film layer, ensure good contact. 3; Strict control of anodic oxidation temperature. From anodic oxidation film forming mechanism, the anodic oxidation at low temperature, the formation of oxide film density, porosity is small, with the increase of anodic oxidation temperature, oxidation film gradually become loose, porosity increases gradually, the color of the film with the temperature rise gradually and darker. Anodic oxidation temperature, therefore, is to determine the degree of oxidation film density factor, is to determine the important factors of oxide film color uniformity. 4. Strictly control the current density of anodic oxidation. With the increase of current density, the color of the oxide film gradually deep, the thickness of the membrane layer thickening and thinning, the reason is that current density increases, the membrane pores increase, easy to color; Current density decreases, and the growth rate of membrane, membrane layer of dense, so with the increase of current density, the color of the oxide film is gradually getting deeper. In the case of other conditions unchanged, and improve the current density, oxidation film growth speed, time of oxidation, membrane layer reduced the volume of chemical dissolving, film is hard, good abrasion resistance. But cannot rise too high current density, otherwise it will due to the effect of joule heat, film hole internal heating effect, local temperature rise significantly, oxide film dissolve faster, film-forming rate declines. This means higher current density, in a certain range can improve the film formation rate, but after reaching a certain value, the film speed down instead. The size of the current density directly affect the uniformity of oxide film color.