Corrosion from Reclaimed Water

Ask an Expert From: Products Finishing, , from Products Finishing magazine

Posted on: 4/5/2011

Can you please tell me if powder coated aluminum can hold up to reclaimed water?

Q. Can you please tell me if powder coated aluminum can hold up to reclaimed water? We use reclaimed water here in Florida for lawn irrigation and I need to know if this will hold up for mailbox post application. K.W.

 

A. Yes, it can hold up but there are some important qualifications. You will need a good aluminum conversion coating to create a surface that is conducive to good bonding of the coating. You will need an epoxy primer coat to provide good chemical resistance and provide good edge coverage. You will need a chemically resistant topcoat that has good UV protection. The combination of primer and topcoat should be between 3 and 6 mils. If you do it correctly it will hold up very well.
 


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