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-----Long Term Storage of Conversion Coated Parts Prior to Painting, A Problem?
2007
We are storing a machined 6061 housing that has been conversion coated to MIL-C-5541 Class 3. The storage time is approx. 3-6 months is a well controlled (AC/Heat)stock room prior to applying a final prime and finish coat of epoxy primer and polyurethane paint.
We have had some chipping problems. My Questions
Is the Conversion Coating class 1A or 3 the correct coating for storage. I And, can the coating or the aluminum surface become contaminated and decrease paint adhesion. If so can you suggest a process to remove the contaminates to give better paint adhesion.
QA Engineer - Mason, Ohio
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Chemfilm becomes less hydrophilic (less wettable) as it ages. MacDermid advertises that Iridite NCP has better wettability for paints than traditional chem film, both initially and after aging.
- Goleta, California
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2007
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