Surface rust is of absolutely no consequence. I have black iron towers that were constructed 40 years ago that have substantial surface rust. While not pretty, it is structurally insignificant. If it looks more like discoloring than rust, which if the galv is good is what it usually looks like, I would do nothing. Anything you do to fix it will likely speed the rusting process up. For instance, you could use naval jelly <https://content.interlinebrands.com/product/document/10146/441423_TechSheet.pdf>, which would remove all the rust. If it is galv and not SS, the acid will eat more of the galv coating off and it will rust faster from then on unless you paint it. Then you are stuck painting a galv tower which is a PITA, expensive, and will eventually look even worse. Paint, even when applied correctly with the correct prep, just doesn't adhere to galv well.
Sleep tight, don't worry, take the do nothing decision tree. On Thu, Nov 5, 2020 at 5:31 AM Matt Hoppes < [email protected]> 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/ > > > > > > *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]> 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? > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > > > -- > > Lewis Bergman > > 325-439-0533 Cell > ------------------------------ > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- Lewis Bergman 325-439-0533 Cell
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