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There are three reasons for the uneven color of aluminum profile oxide film

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Update time : 2022-11-24 18:41:19
Analysis of three reasons leading to the uneven color of aluminum profile oxide film:
1. The area of aluminum profile workpiece is too large, the swing in the groove is too large during operation, and the contact, update and exchange between the edge and the center part and the solution are too large, which leads to the color inconsistency of the oxide film.
Prevention method: aluminum profile oxidation workpiece swing amplitude should be small, static treatment can also be, but when the solution temperature is too low, it is easy to appear map spots, it is not natural.
2. Part of the aluminum cladding layer is damaged and cut off when the aluminum profile is processed. The outer aluminum cladding is high quality aluminum, and the inner layer of the aluminum cladding is mixed aluminum.
3. Oxidation process operation problems
① The workpiece alkaline etching treatment is not complete, local original oxide film, dirt can not be removed;
② No immediate light treatment after alkali corrosion, the workpiece surface is still alkaline;
③ The workpiece has been in contact with foreign bodies in the process of transfer.
When the film layer color is not uniform, we should find the reasons from many aspects and take targeted measures to solve it.
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