>...."or a rusty metal primer first."
I wouldn't think a primer would allow the zinc overcoating to
adhear to the base metal. Right?
Charlie, N0TT
On Tue, 10 Aug 2021 17:50:34 -0400 <john@kk9a.com> writes:
> I have had very good luck with Brite Zinc cold galvanizing paint in
> normal
> environments (i.e. not the ABC islands). Even galvanizers use cold
> galvanizing paint to touch up missed areas. I do not believe that it
> is
> meant to be applied over rust. You should either clean the rust, use
> a rust
> neutralizer or a rusty metal primer first.
>
> John KK9A
>
>
> Donald Chester k4kyv wrote:
>
> I had very poor outcome with zinc enriched paint. I painted over
> some rusty
> spots on outdoor hardware years ago with stuff called "Cold Galv",
> and rust
> began to peer through the paint in about a year. That paint is no
> substitute
> for real galvanising, which works by *galvanic* action, meaning the
> zinc is
> in direct electrical contact with the metal it is protecting. The
> zinc
> particles suspended in enriched paint are insulated from the base
> metal by
> the body of the paint, which if not a good insulator is at best a
> poor
> conductor.
>
>
> Don k4kyv
>
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