[TowerTalk] Experience with Sacrificial Zinc?

[n0tt1 at juno.com]

>...."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 at 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
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>