The quality of wholesale aluminium composite panels is of great concern to everyone,
so when choosing and using them, they will be properly checked.
One reason is the anodic oxidation film thickness is not enough,
this should pay attention to check whether the anodic oxidation process is standardized, see whether the temperature, voltage,
conductivity and other factors are stable, if there are abnormalities, should adjust the specification; no abnormalities,
you can properly extend the oxidation time, to ensure that the film thickness up to standard.
One reason is that the PH value of the dyeing solution is too high,
for which you can use glacial acetic acid to adjust the PH value to the standard value.
Another reason is that the workpiece must be dyed in time because it has been left in the sink for too long after oxidation.
The workpiece can be placed in the anodic oxidation tank or in the nitric acid neutralisation tank for proper activation treatment before dyeing,
so that the effect will be good.