Were those the stinger like thing? If so, they were a dielectric lens antenna, cannot imagine a coating helping.
Sent from my iPhone > On Nov 5, 2020, at 4:55 PM, Ken Hohhof <[email protected]> wrote: > > > Any idea what Cambium sprayed inside their CLIPs? I think it was a bronze or > purple color. > > From: AF <[email protected]> On Behalf Of [email protected] > Sent: Thursday, November 5, 2020 5:36 PM > To: 'AnimalFarm Microwave Users Group' <[email protected]> > Subject: Re: [AFMUG] Stopping tower rust > > All the original stingers used arc sprayed zinc on the reflector. Same stuff > as hot dipped galvanized. Same stuff as welding or grinding on galvanized > steel pipe. > > We vaporized it. I inhaled tons of it over the years. It doesn’t hurt you > but if you get too much you will have a sleepless night. You get what is > called zinc fever and it is very unpleasant. But you have to inhale a bunch > of it to get it. > > Casual grinding or welding will not do it as long as the fumes are being > blown away. But it is not toxic like it will kill you or cause permanent > damage. It actually seems to protect you from catching colds. > > From: Ken Hohhof > Sent: Thursday, November 5, 2020 4:27 PM > To: 'AnimalFarm Microwave Users Group' > Subject: Re: [AFMUG] Stopping tower rust > > Just drink some milk, you’ll be fine. > https://www.quora.com/Why-do-welders-drink-milk > > > From: AF <[email protected]> On Behalf Of Jaime Solorza > Sent: Thursday, November 5, 2020 3:31 PM > To: AnimalFarm Microwave Users Group <[email protected]> > Subject: Re: [AFMUG] Stopping tower rust > > Wear breathing protection when doing any work on galvanized stuff... > > > On Thu, Nov 5, 2020, 9:41 AM Ken Hohhof <[email protected]> wrote: > The bottom line is, if it’s a Rohn tower, it’s almost certainly galvanized > not stainless. > > If there’s some rust on the cross members and step bolts, it’s probably that > people stepping on them wore through the galvanizing? You could remove the > rust with a steel brush and spray with cold galvanizing, but if it’s where > people step, that’s not going to last. Question maybe is whether it’s > cosmetic or structural. > > > From: AF <[email protected]> On Behalf Of [email protected] > Sent: Thursday, November 5, 2020 10:28 AM > To: AnimalFarm Microwave Users Group <[email protected]> > Subject: Re: [AFMUG] Stopping tower rust > > Brown rust. You can cause it with muriatic acid, but when I have tried to do > it in the past, my outcome was not uniform. Maybe it would have been OK with > some weathering but it was not aesthetically pleasing initially. > > From: Bill Prince > Sent: Thursday, November 5, 2020 9:20 AM > To: [email protected] > Subject: Re: [AFMUG] Stopping tower rust > > There is also COR-TEN steel, which develops a special protective layer of > rust. > > https://www.corten.com/what-is-corten-steel.html > > bp > <part15sbs{at}gmail{dot}com> > On 11/5/2020 8:04 AM, [email protected] wrote: > There are multiple kinds of rust. Some power transmission line towers are > rusty on purpose. > > Red Rust Hydrated oxide Fe2O3•H2O > Yellow Rust Iron oxide-hydroxide FeO(OH)H2O > Brown Rust Oxide Fe2O3 (high oxygen/low moisture) > Black Rust Iron (II)oxide – Fe3O4 (limited oxygen) > > I think I have the order right. Red rust can eat clear through the metal. > It produces deep flakes of cancer in the thickest of steel. If you can get > the rust to progress through to brow rust it is a permanent coating that will > not continue to deteriorate. Not sure how you make that happen. If you take > a stroll along the pedestrian walkway of the Golden Gate bridge, you will see > 1/2” thick parts of the handrail that have flaked completely through. And > that is with regular scaling and painting. > > You can go look at an old piece of farm machinery in a field and the steel is > really good looking. Dark brown and black rust. > > > From: Lewis Bergman > Sent: Thursday, November 5, 2020 6:51 AM > To: AnimalFarm Microwave Users Group > Subject: Re: [AFMUG] Stopping tower rust > > 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, 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 > mailto:[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 > mailto:[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 mailto:[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 mailto:[email protected] On Behalf Of [email protected] > Sent: Wednesday, November 4, 2020 9:22 PM > To: AnimalFarm Microwave Users Group mailto:[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 > 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? > -- > 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 > > -- > 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 > -- > 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
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