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Temperature of the anodizing solution

Release time:

2022-06-24 15:19

The temperature of the anodic oxidation solution is the dominant process parameter that affects the properties of the oxide film. When the temperature increases, the viscosity of the solution decreases, the current density increases (when the voltage is constant), or when the voltage decreases and the current is constant, the power consumption can be reduced at this time, and the production efficiency can be improved.

When the solution temperature exceeds the process specification (24 ℃)The dissolution rate of the film is intensified, resulting in a decrease in the generation rate of the film, the hardness of the film and the thickness of the film, a decrease in wear resistance and corrosion resistance, a loose oxide film, and a powdery film layer may also appear, followed by a decrease in the transparency of the film layer. And affect the dyeing performance, resulting in the dyeing color is not clear enough, or even fog. This is especially important for the workpiece to be dyed, to do everything possible to reduce the temperature of the solution.

When the solution temperature is too low, such as below 12 ℃Although the thickness of the oxide film can be increased and the wear resistance is also good, the brittleness of the film increases, the porosity is small, and it is difficult to dye the parts. For this reason, when aluminum and aluminum alloys are anodized, the solution temperature must be strictly controlled to prevent the solution temperature from being too low.

Anodic oxidation is an exothermic reaction, the formation heat of the membrane is very high, and the solution temperature rises rapidly. Therefore, according to the existing conditions, corresponding measures should be taken to control the solution temperature within the normal process specifications to ensure the quality of the membrane and the continuous production. When the solution temperature is too low, which is not conducive to the requirement of dyeing after anodic oxidation, the general parts can be processed first, and then the dyed parts can be processed when the solution temperature rises slightly, which must be mastered by experience.