I think it is dissolution also. I have had it happen. Once or twice was because the parts were accidently left in the anodizing tank too long. Another time was when we changed the electrolyte, which threw our normal time data off. And I have seen it when the temperature got too high as well.
The parts might look super when first dyed, but when they are sealed and or dryed, the truth comes out. It doen't seem to affect the part evenly, so some areas may look "ok", while others are not ok.
|