How is die casting aluminum unsuitable for anodizing? This is all decided by the composition of die cast aluminum and the characteristics of anodic treatment.
To put it bluntly, the anodizing of aluminum is the whole process of this electrolytic air oxidation. In the whole process, the surface layer of aluminum and aluminum alloy profiles is generally converted into layers of air oxide film, which has defensive, decorative art and some other features. From this definition, the anodizing of aluminum only includes the whole process of converting to anodizing film.
First of all, the anodized aluminum surface must be crystalline, and the aluminum profile is relatively pure. As the anodized film must be symmetrical and even. Excess residue and other ingredients will certainly harm the thickness of emulsion to be broken during anodic treatment, and even immediately harm whether it is demulsification The key is that other metal design elements will immediately change the color of the anodized film when the anodized film is converted into, which will immediately kill the dye after anodizing.
Aluminum alloy castings and castings usually have high silicon water content. Even if ht412 die casting aluminum special type ash remover is applied, the anodic treatment film will be dark brown, and it is impossible to obtain a full-transparent air oxide film without color. With the increase of silicon water content, the color of the anodic treatment film will change from light gray to dark gray to gray black. Therefore, aluminum alloy casting is not suitable for traditional anodic treatment.
However, die casting aluminum is also the solution of anodic treatment. Castings can be used for forging and pressing parts, car parts/CNC parts that cannot be guaranteed in terms of structure, rhombus, air oxidation quality, and the quality of castings with the focus on them are very important. The quality of anodic oxidation is determined by the process support of one minor change and key point. Producers engaged in air oxidation of castings must scientifically study the runner technology, die-casting process and post production processing method of supporting and controlling abrasives.
The strict control of the whole process can ensure the successful production of air oxidation quality. This includes: the design concept of the flow passage and the rubber mouth of the grinding tool, and the control of the mold temperature; For the application of raw materials, ht412 die casting aluminum special type dust remover can usually be used to remove the cool dust on the surface to prevent environmental pollution factors.