This stuff was used a few years ago to construct the support structure
of an antenna farm on a County building here in FL. I had the
opportunity to look at some IM problems on that roof top. I suspect the
oxide between the metal contact points is a contributing factor.
Bob Perring wrote:
>
> At 17:57 3/23/98 -0500, N. S. FIRESTONE wrote:
> >United States Steel Company, now USX Corp, put up their HQ building here
> >using a new steel product, "Core Ten". It oxidizes (rusts) a surface
> >finish that is supposed to be protective and self healing.
> >Aren't some of the light standards out on the highway/interstate Core
> Ten
> >material as well?
> =============================>
> I remember seeing them put some of these light poles up in Pensacola,
> FL about 20 years ago. They rusted up pretty fast, just as they were
> supposed to do, but stained the surrounding concrete just it was not
> intended/anticipated..
>
> As to the strength of this material, well I don't know, but I guess
> someone figured they would hold up large highway lamps.
>
> There was even a pump manufacturer building large vertical mixed flow
> pumping units out of this material; the "feature" being a cheaper
> approach to corrosion resistance of the fabricated items.
>
> As I understand it, the rusting stops after an initial surface coating,
> something like aluminum does. But, also, as I understand it, if the
> surface is scratched the corrosion starts again so as to build a new
> outside material coating.
>
> 73,
> N5RP
>
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--
Joe Leikhim K4SAT (EX KE4TZH)
Jleikhim@nettally.com
"tv dinner by the pool,
i'm so glad i finished school" -F.Zappa 1967
"The Revolution will NOT be televised" -Gil Scott Heron
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