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The color of aluminum composite panel is uneven, and the Aluminum Composite Panel Manufacturers has three great tricks.
1. The area of aluminum composite panel is too large, and it swings too much in the tank during operation. The contact, renewal and exchange between the edge and the center part and the solution are too different, which leads to inconsistent color of oxide film. Preventive measures: The amplitude of workpiece swing should be small when aluminum panel is oxidized, and static treatment is also acceptable. However, when the solution temperature is too low, it is easy to appear map-like spots, which is unnatural.
2. During the processing of aluminum clad panel, part of the aluminum clad layer was damaged and cut off. The outer clad layer belongs to high quality aluminum, and the inner clad layer is miscellaneous aluminum. There is a big difference between the two kinds of aluminum, so white spots appear after oxidation. Customers often don't quite understand this phenomenon, so manufacturers should do more explanation work to explain why, so as to avoid misunderstanding.
3. Problems in the operation of aluminum composite panel oxidation process
(1) The alkali etching treatment of the workpiece is not complete, and the original oxide film and dirt in some parts are not removed;
(2) After alkali etching, the light treatment was not performed immediately, and the surface of the workpiece was still alkaline;
(3) The workpiece has come into contact with foreign matter in the transfer process.
When the color of aluminum composite panel is uneven, we should find the reasons from many aspects and take targeted measures to solve them.
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