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Rifles, Reloading, Optics, Equipment
Equipment Discussions
ammonia in coppermelt
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<blockquote data-quote="ricka0" data-source="post: 76358" data-attributes="member: 3086"><p>[ QUOTE ]</p><p> [ QUOTE ]</p><p> 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. </p><p> </p><p></p><p>[/ QUOTE ] </p><p></p><p>[/ QUOTE ]</p><p></p><p>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.</p><p></p><p>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.</p><p></p><p>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.</p></blockquote><p></p>
[QUOTE="ricka0, post: 76358, member: 3086"] [ QUOTE ] [ QUOTE ] 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. [/ QUOTE ] [/ QUOTE ] 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. [/QUOTE]
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