What problems will be encountered in the surface treatment of industrial aluminum?

by:Zeyi     2021-10-07
In our surface treatment process, the most prone problem is that the color of industrial aluminum material is not good when it is oxidized. When industrial aluminum profile material is coloring, it must be anodized first, and the oxidation process must be guaranteed during oxidation. Stability, that is, the film thickness and pores of the oxide film are uniform, and the conductivity is good, so that an oxide film with uniform color can be obtained. Since each crystal cell of the anodic oxide film has a membrane pore, and these membrane pores have quite strong adsorption, they are specially used to adsorb dyes. When the adsorption process occurs, it needs to be sealed in time, so as to The dye is firmly locked in the film hole to enhance the corrosion resistance and wear resistance of the profile product, so the anodizing process is particularly important. Here we need to pay attention to the oxidation, the workpiece should be dyed immediately after anodizing. If the workpiece is exposed to the air for too long after anodizing, the pores of the membrane will shrink, and it may be stained with dirt, which will cause difficulty in dyeing. If the dyeing tank is too small, when dyeing in batches is required, the parts to be dyed should be soaked in clean water. Furthermore, the workpieces cannot be overlapped during dyeing, and the workpieces cannot be overlapped during dyeing, especially the flat parts, otherwise the overlapping parts will be covered and form a yin and yang surface, which is very unsightly. Strengthen the washing after dyeing. If the surface of the workpiece is not washed, the residual pigment on the surface of the workpiece will contaminate the industrial aluminum. How to deal with the problem of surface treatment of industrial aluminum: For the problem of surface coloring of industrial aluminum, we can first see if it is the thickness of the oxide film, the temperature and concentration of the oxidation bath, and then the temperature of the dye Inhomogeneous concentration and concentration will also affect the oxidation of industrial aluminum, and poor conductivity will also have an effect, but these are some ways that uneven coloring is often eliminated. There are also some industrial aluminum materials that cannot be dyed directly. Solutions: 1. Check whether the anodizing process is standardized, and see whether the temperature, voltage, conductivity and other factors are stable. If there is an abnormality, please adjust the specifications accordingly. If there is no abnormality, The oxidation time can be appropriately extended to ensure that the film thickness meets the standard. 2. Improper selection of dyes. Need to select suitable dyes. 3. The oxidation temperature is too low, resulting in a dense film. The oxidation temperature can be increased appropriately. 4. After oxidation, the industrial aluminum has been placed in the sink for too long. It is recommended to place industrial aluminum in an anodizing tank or nitric acid neutralization tank for proper activation treatment before dyeing.

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