Due to the strong plasticity and high-temperature resistance of aluminum materials, its unique advantages make the modified materials have a wide range of applications. At present, the market demand for coloring by aluminum oxidation processing is increasing day by day, and the most commonly used method for aluminum surface treatment is an anodizing reaction.
1. Aluminum hard oxidation: strengthen the washing before dying
After taking out in the anodic oxidation tank, the aluminum parts should be fully washed, especially the die casting parts slit, hole position, and other parts. Otherwise, the color of the surface of the residual acid and alkali parts will be significantly different from that of the clean parts, and even the corrosion of the oxide film will show white.
2. Immediately dyed after anodizing
After the die casting parts are anodized and exposed to the air for a long time, the pores of the film layer will be reduced, and it may be stained with dirt, resulting in difficulty in dyeing. It should be dyed immediately after anodizing.
3. The die casting parts must not overlap when the aluminum is hardened and dyed
The dyed pieces cannot be overlapped, especially the plane parts, otherwise, the overlapping parts will be covered to form the yin and yang sides.
4. Strengthen the rinse after dyeing
The surface of the die casting parts is not washed cleanly, and the residual pigment will contaminate the assembly.
5. Carefully disassemble the die-casting parts
When removing the fixture, the die casting parts should be strictly prevented from being scratched, otherwise, white scratches will appear, and the die casting parts cannot be hard-drawn before the fixture is released.
6. Packaging Requirements
The outer packaging of the die casting parts should be soft and clean paper, and it should be individually packaged to prevent scratches from friction.