[TowerTalk] Brown colored galvanized surface?

[Mike]

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.
>
> 73
>
> Roger (K8RI)
>
>
>>
>> 73,
>> Mark, K5ER
>>
>>
>>> Howdy, TowerTalkians --
>>>
>>>     On lots of old galvanized towers sometimes you wind  up with a
>>> brownish
>>> colored surface. Can anyone tell me what it is? It's not rust but
>>> something else. Just curious. Tnx.
>>>
>>> Cheers,
>>> Steve     K7LXC
>>
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