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How do you apply galvanneal

I am making a marine trap that spends most of its time on the ocean floor. I've tried both zinc plating and a hot dip galvanize to the wire before applying a PVC coating in a fluidized bed process. I am having a problem with the PVC coating adhering. Someone has suggested galvanneal. What is this and how is it applied.

TOM ROBIDEAU
- NORTHBROOKFIELD, Massachusetts

Galvannealing is essentially hot dip galvanizing followed by an annealing process that causes the zinc and iron to form intermetallics that are a good paint base. It seems that it should be easier to PVC coat than a galvanized finish. But isn't a primer required before the PVC coating?

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.

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