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Old November 17, 2012, 05:23 AM   #3
Senior Member
Join Date: June 14, 2004
Location: NY State
Posts: 6,326
You're assuming that it's 'oxidation '. Copper and it's alloys usually form a sulfide though it can also oxidize. It can also react to ammonia compounds . Cracked case necks -is caused by stress corrosion cracking .Thunderstorms create ammonia compounds from nitrogen in the air .
It's too early to give metallurgy lessons .
And Watson , bring your revolver !
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