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Posted by spaco on October 5, 2009, 5:24 pm
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A guy I know has this done often on gates and railings. I think you
have the basics right, but there's a fair amount of art involved in
doing it right so the zinc stays there. There's a lot of variation in
surface finish, too. Then there's the issue of getting paint to stick
to the zinc. Auto mfr's have only recently figured that one out.
How about using "cold galv"? It is a paint that is supposed to work
in "sacrificial mode", like the zinc galvanizing process. It comes in
both spray cans and for brush-on application. I think your friendly
welding supplier has it.
Pete Stanaitis
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bigegg wrote:
> Been reading up on this recently as a means of rustproofing some of
> my projects.
>
> Seems to be as simple as an acid pickle, dip in washing soda to kill the
> acid, then straight into a pot of molten zinc (which is "pot metal", and
> can be melted in a bread tin/cast iron pot straight on the forge)
>
> I actually use a charcoal fired "furnace" (in quotes because it's a
> bucket lined with a ceramic chimney pot, backfilled with sand, and a
> tube through the side for a blower, not a professional furnace) which
> will melt a 4in steel pipe crucible of zinc in about 10 minutes once
> it's hot.
>
> I've not actually tried the galvanising (don't have acid at the moment),
> but I'm going to give it a go sometime this week.
>
> Has anyone else tried this?
>
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