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Re: [TowerTalk] Brown colored galvanized surface?

Subject: Re: [TowerTalk] Brown colored galvanized surface?
From: Mike <>
Date: Fri, 14 Sep 2012 17:51:03 -0400
List-post: <">>
Before bluing was invented, gun parts were "browned". That was an induced rusting, which was then rubbed with a mild abrasive( today 0000 steel wool) and oiled. It inhibited further destructive rusting.

73, Mike NF4L

On 9/14/12 11:52 AM, K8RI wrote:
On 9/14/2012 11:07 AM, Mark, K5ER wrote:
He Steve,
         Here in the Gulf South, sometimes on vertical tower but pretty
often on horizontal sections waiting to be stacked, that brownish haze
appears. Mostly, it is associated with proximity to hardwood trees,
particularly Oaks. The galv surface is rarely compromised underneath.
Comes off fairly easily with a pressure washer, but sometimes, when its
been there for a few years we need to use something like a milk can
brush. Everybody remembers what that is, right?

What I've seen was rust that had washed down the tower from something higher up. The tower sections (in these cases) was not rusting, but was coated "very evenly" with rust. I never bothered to try and clean it. In one case it was from some painted, steel masting. I've also seen it on galvanized 1 1/2" TV masting as well as painted steel TV masting which had paint peeling and the surface was rusting. The TB-4 looked like it had been spray painted with a very thin coating of brown paint, or stain.

In none of the cases was the material itself rusted inside or out. At least not that I could detect. The surprising part was how evenly coated it had become after installation.


Roger (K8RI)

Mark, K5ER

Howdy, TowerTalkians --

    On lots of old galvanized towers sometimes you wind  up with a
colored surface. Can anyone tell me what it is? It's not rust but
something else. Just curious. Tnx.

Steve     K7LXC


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