....there are some different galvanizing processes.  HDG is distinctively gray and lumpy so I'm sure you wouldn't mistake that for stainless, but yeah maybe you've got something electro galvanized or similar.  Is this a little TV antenna tower?  Almost every comm tower from 30 years ago would be HDG, but people get creative with the little ones.


18% chromium gets you stainless good enough to live outdoors.  In addition to the distinctive silver-grey hue, magnets won't stick to it.



On 11/5/2020 6:30 AM, Matt Hoppes wrote:
Could it be a zinc galvanized steel instead of stainless?  I assumed stainless due to the very limited rust.

On Nov 5, 2020, at 6:27 AM, Matt Hoppes <[email protected]> wrote:


Ok. So then maybe it’s not an issue. It does just appear to be surface.

On Nov 4, 2020, at 11:13 PM, Ken Hohhof <[email protected]> wrote:



Apparently regular steel and stainless steel both “rust”.  But stainless forms a thin stable protective layer of chromium oxide, while regular steel turns to unstable iron oxide which just grows and grows.

https://www.scientificamerican.com/article/why-doesnt-stainless-stee/ <https://www.scientificamerican.com/article/why-doesnt-stainless-stee/>

*From:* AF <[email protected]> *On Behalf Of *[email protected]
*Sent:* Wednesday, November 4, 2020 9:22 PM
*To:* AnimalFarm Microwave Users Group <[email protected]>
*Subject:* Re: [AFMUG] Stopping tower rust

Certainly not stronger and twice the expense.

*From:*Lewis Bergman

*Sent:*Wednesday, November 4, 2020 8:07 PM

*To:*AnimalFarm Microwave Users Group

*Subject:*Re: [AFMUG] Stopping tower rust

I would assume this wasn't a slip of the tongue. Just surprised that anyone would build a tower out of stainless steel. Chuck would likely know but I am pretty sure stainless is softer than regular steel.

On Wed, Nov 4, 2020 at 8:24 AM Matt Hoppes <[email protected] <mailto:[email protected]>> wrote:

    We have a stainless steel tower that’s probably about 30 years
    old. Good shape. But I noticed some minor rust developing on the
    surface of some cross members and a few climbing pegs.

    What’s the best way to stop this and protect the tower?
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