----- Original Message -----
Sent: Friday, September 11, 2009 8:32
PM
Subject: Re: [PSUBS-MAILIST] Paint on
Galv.
Hi Frank,
I was refering to galvanized steel only. Most good coating systems use a
zinc rich primer as a first coat followed by high build epoxy.
I did not mean to imply that this was inappropriate, as a matter of fact
it is the exact system I am using.
My first coat after sandblasting was Sherwin-Williams Corothane I
Galvapac two pack zinc primer. This is a moisture cure urethane
system that requires the mixing in nof the zinc dust. Nasty side effects
- Air supplied respirator
is needed. They also have many other zinc primers available.
My next two coats
were
Sherwin - Williams Macropoxy 646 a high solids two component epoxy.
Hope this helps. Sorry about any confusion I caused.
Best Regards,
Jim K
On Fri, Sep 11, 2009 at 10:41 AM,
<ShellyDalg@aol.com> wrote:
Hi Jim. I've seen hot dipped assemblies painted on jobs I worked on.
The most recent was two sets of stairs at a local college. Big, about 30
feet long and shipped out completely welded and hot dipped.
After installation they were sanded a little to smooth out the
galvy coating and spray painted. I assume it was an enamel. It smelled like
a solvent based paint, maybe like "Rustoleum" or something.
Is there a paint that CAN be applied over a zinc coating that
won't de-bond ?
The only time I've done it myself was painting lettering on the
Zincalate paint mentioned before and like I said, after a year or so the
lettering faded out. This is on the roof and it gets hot, cold, and
weathered. Not submerged.
Frank D.
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