[TowerTalk] SS galling revisited

[Jon Pearl - W4ABC]

Hi Patrick,

I'm on the Gulf coast of Florida and I'm surrounded on three sides by 
salt water.  I use Bostik brand Never Sees 'Regular Grade' lubricant 
http://www.bostik-us.com/sites/default/files/NSRegular.pdf on the SS 
fasteners on my tower and antennas - specifically because it's noted in 
their literature as being beneficial for use in salt water 
environments.  I've only used the product for a couple of years now, so 
as of yet, I don't have much of a track record with it.  Its major 
ingredients are grease with graphite, copper flake, aluminum powder and 
zinc oxide.  Does it contain some amount of Molybdenum disulfide?  It's 
not called out in this product's ingredients list, so I'm not sure if 
trace amounts do exist.

Of note: both the 'Blue Moly' 
http://www.bostik-us.com/sites/default/files/NSBlueMoly.pdf and 'Black 
Moly' http://www.bostik-us.com/sites/default/files/NSBlackMoly.pdf 
lubricants contain Molybdenum disulfide.

Along with the products listed above, there are also formulations for 
Marine, High Temp Stainless, High Temp Stainless Nuclear Grade and a few 
others at 
http://www.bostik-us.com/market-products/product-assembly/mro/products/




73,


Jon Pearl - W4ABC
www.w4abc.com






On 5/10/2014 10:09 AM, Patrick Greenlee wrote:
> Had a chat with my mechanical engineering consultant (MS Mech Eng 
> UCLA  and 35+ years of hands on experience.)  I mentioned how SS 
> galling was a topic of interest to hams especially regarding towers. 
> He gave me this tidbit of advice.  Do  N O T  use moly-disulfide based 
> lubricants anywhere near salt or brackish water. This would be an 
> issue for for coastal or near coastal hams.  What happens is that the 
> chemistry of the lubricant in the presence of salt will LOCK the 
> threads.  For this reason the Navy does not use Never-seez on subs (my 
> friends specialty was a deep diving research sub, The Dolphin - 555), 
> only the copper based anti-seize products.
>
> Patrick NJ5G
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