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Does powdery Alodine 5200 hurt adhesion?

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When treating aluminum with alodine 5200,sometimes after the product dries there is a powdery coating that is left behind. does this powder affect the paint adhesion?

Jean-Paul Popiel
- Winnipeg, Manitoba, Canada

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I would certainly expect so, and would expect that over-drying was the problem. Do you paint these parts or reject them? If you paint them, what have you found regarding adhesion? Thanks.

Ted Mooney, P.E. finishing.com Brick, New Jersey

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