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Three reasons for the color irregularity of aluminum profile:
(1) aluminum workpiece size is too big, when swinging at groove is too big, edge and center parts contact with the solution, update, exchange have too big difference, which can lead to oxidation film color inconsistencies..Prevention method: when the aluminum profile is oxidized, the workpiece should be small and static, but when the solution temperature is too low, it is easy to get the map pattern.
(2) bags aluminum processing part package aluminum layer is destroyed, and cutting out the outer package belongs to the high quality aluminum, aluminum wrapped up the inner is aluminum, differences in two kinds of aluminum, so "good Dian wind" spots after oxidation.This phenomenon customer often does not understand very much, the manufacturer wants to do more explanation work, explain the original committee, lest cause misunderstanding.
(3) problem of oxidation process operation
The alkali erosion treatment of the workpiece is not complete, and the original oxide film and dirt in the local area cannot be exhausted.
The surface of workpiece is still alkaline.
The workpiece has been exposed to foreign objects during delivery.
When the color of the film is uneven, it is necessary to find out the causes and take targeted measures to solve it.
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