Mel
>I have not coated much aluminum in my career but there is a greenish
>primer I have often seen applied to aluminum in the marine environment
>(Zinc Chromate??? anyone?, anyone?) The important thing is to get the
>manufacturers specifications for surface preparation and be prepared to
>follow them religiously before starting to strip!
>
OK here we go having done this more times that I care to remember
in my youth aboard Navy Tin-Cans...
After you remove the old paint with a chipping hammer or the like
the aluminum surface is wire brushed to remove any remnants.
It is then coated with what is called Formula 117 acid etch
which was a translucent green goop that you mixed 1 part acid
to 4 parts base. It stopped all corrosion but would make you higher
that an F14 at altitude if were exposed to it too long..
Then the surface got a double coating of yellow gree Zinc Chromate
as as base coat and then a coat of good ol' haze grey enamal..
Bob B
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This archive was generated by hypermail 2b29 : Wed Nov 01 2000 - 21:37:47 PST