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ammonia in coppermelt

 
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  #22  
Old 07-17-2005, 08:15 PM
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Join Date: Aug 2004
Location: utah
Posts: 302
Re: ammonia in coppermelt

jb1000br,
I have read more than 100 of your 728 posts, you are the #1 malcontent on this forum. The next time you say anything good about something that was not your idea will be the first time, go kick the crap out of the neighbors dog and come back with a fresh approach tomorrow.
B
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  #23  
Old 07-18-2005, 12:19 AM
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Join Date: Nov 2004
Location: GF Montana
Posts: 467
Re: ammonia in coppermelt

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When we met with Good groupers bunch we spoke of the coppermelt affecting steel. One of the guys said that they applied coppermelt to gunsteel (4140 and stainless I think) for a period of time and saw no sign of discoloration or damage.


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Long ago GG mentioned his buddy's 50 BMG lost all accuracy after cleaning with strong ammonia. I said that was not possible, as tests (similar to the above) show Ammonia cannot react with gun steel. The test was a member of the 50 community took a section of gun barrel, filled it with strong ammonia, sealed it for a week then inspected it. Sounds like definitive proof Ammonia is OK. The chemists I'm working with pointed out the test is invalid for the following reasons: <ul type="square">[*]Ammonia needs free oxygen to react with copper and other metals - a filled/sealed barrel prevents free oxygen[*]It's possible Ammonia is reacting with the few nickle, chromium or other essential atoms in the matrix - and the inspection approach would not revel that problem.[/list]Both chemists tell me that I cannot claim strong ammonia is safe until I repeat the test with a continuous air bubble - then after a week have the ammonia analyzed via gas chromatography to verify there are no nickle, chrome, etc reactants.

I'm sure coppermelt has done these tests and that it is a safe product - but a simple soaking an inspection is inadequate to prove such. I don't think Ammonia does attack gun steel, but several ammonia based cleaners explicitly warn against leaving it in your barrel for an extended period. Maybe GG buddy was right.

I would love to add coppermelt to my tests but the VHP editor isn't interested unless I can list commercial sources and I can talk to someone from the company.
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  #24  
Old 07-18-2005, 12:25 AM
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Join Date: Feb 2005
Location: Northeast Ohio
Posts: 301
Re: ammonia in coppermelt

hmmm

it could be nearing that time when a mandatory group hug is called upon [img]/ubbthreads/images/graemlins/confused.gif[/img]
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