Relationship between aluminum model and film deposition rate
[China Aluminum Network] The advantages and disadvantages of aluminum profiles can be distinguished in alkaline etching. If there are too many gray-black films or red films on the surface after the alkali etching, this must be silicon-containing or copper-containing. For higher aluminum, the film-forming time for this kind of aluminum chemical conversion should be shortened, otherwise the resulting film layer must also be difficult to meet the conductivity requirements.
Therefore, the oxidation needs to be different according to different aluminum profiles. In order to do this, aluminum profiles of different types of aluminum materials are not allowed to be bundled in the same string, so as to avoid control of their respective appropriate oxidation time.
After different types of aluminum profiles were subjected to conductive chemical conversion treatment, the difference in the appearance color of aluminum profiles was more obvious than the difference in oxide films obtained due to different process recipes. In general, the higher the purity of the aluminum, the slower the film formation rate; conversely, if the purity of the aluminum is lower, the film formation rate is equally faster.
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