In order to decorate and improve the surface performance of aluminum materials, coloring treatment will be carried out on the product case.
Commonly used methods include electrolytic coloring, chemical coloring and natural coloring.There will be some color difference in each batch of products, resulting in different quality defects.
In a specific medium, the depth of color is determined by the amount of metal particles deposited, and has nothing to do with the thickness of oxide film.Then, how to solve this problem, to ensure that the color difference of each batch of products is consistent, and within the deviation range confirmed by both parties, to ensure that the needs of guests are met.
We can control the color differences via the following ways
1. Strengthen the control of anodizing process operation. When the profile enters the coloring tank, it must keep a large inclination and be placed in the middle of the two poles to ensure that the left and right distances are equal.
2. Check whether the concentration of bath liquid meets the process requirements.
3. The coloring voltages of the same color must be equal, and the power supply voltage should be adjusted in advance.4. At the end of coloring, it is necessary to lift immediately, drain the bath liquid as soon as possible, and move it to the water tank for washing.
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