First, when the oxide film powder has the bad condition of ash, we should first try to try to erase it.
First, when the oxide film powder has the bad condition of ash, we should first try to try to erase it. The dust caused by the closing process and the dust caused by electric damage should be swept away.
Secondly, the source of oxidized ash is analyzed one by one.
Generally, the film layer is caused by the following points:
1. The oxidation tank temperature is too high.
2. The concentration of sulfuric acid is too low;
3. Aluminum ion content exceeds 18g/L. (The reason for the agile increase of aluminum ion content is mostly caused by the high temperature of the oxidation tank, and then the oxidation tank missing parts are not timely salvaged)
Oxidation tank temperature is too high, to determine the cold engine equipment is not large enough? If the usual cooling capacity can also be considered, it is necessary to consider the size of the cold water circulation, whether the circulation pump is blocked by too high the temperature, one by one.
Sulfuric acid content should be regularly measured and compensated for sulfuric acid consumption according to the daily oxidation tank. Keep the time within the process range (180-220g/L is the best).
Electrolyte temperature has a great impact on the wear resistance of oxide film. Generally speaking, if the temperature decreases, the wear resistance of the anodic oxide film of aluminum and aluminum alloy increases, which is caused by the decrease of the dissolution rate of the electrolyte for the film, in order to obtain a higher hardness of oxide film. We should master the temperature within the range of ±2℃ for hard anodic oxidation treatment.
