Any idea what Cambium sprayed inside their CLIPs? I think it was a bronze or purple color.
From: AF <af-boun...@af.afmug.com> On Behalf Of ch...@wbmfg.com Sent: Thursday, November 5, 2020 5:36 PM To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com> 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 <af-boun...@af.afmug.com <mailto:af-boun...@af.afmug.com> > On Behalf Of Jaime Solorza Sent: Thursday, November 5, 2020 3:31 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com <mailto:af@af.afmug.com> > 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 <af...@kwisp.com <mailto:af...@kwisp.com> > 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 <af-boun...@af.afmug.com <mailto:af-boun...@af.afmug.com> > On Behalf Of ch...@wbmfg.com <mailto:ch...@wbmfg.com> Sent: Thursday, November 5, 2020 10:28 AM To: AnimalFarm Microwave Users Group <af@af.afmug.com <mailto:af@af.afmug.com> > 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: af@af.afmug.com <mailto:af@af.afmug.com> 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, ch...@wbmfg.com <mailto:ch...@wbmfg.com> 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:mattli...@rivervalleyinternet.net 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:mattli...@rivervalleyinternet.net 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:af...@kwisp.com 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:af-boun...@af.afmug.com On Behalf Of ch...@wbmfg.com <mailto:ch...@wbmfg.com> Sent: Wednesday, November 4, 2020 9:22 PM To: AnimalFarm Microwave Users Group mailto:af@af.afmug.com 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:mattli...@rivervalleyinternet.net 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 AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- Lewis Bergman 325-439-0533 Cell -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- Lewis Bergman 325-439-0533 Cell -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com _____ -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com _____ -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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