7 Sources of Contamination that Affect the Quality of Anodized Aluminum Finish
The Impact of Foreign Materials on Aluminum Parts before Anodizing
Although simple in principle, there is a lot of confusion over how aluminum parts need to arrive at the metal finisher so that they can be anodized. Any time a component part comes from a completed assembly that has been taken apart, there is a high risk that some other material will come along and interfere with the coating process.
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