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Rifles, Reloading, Optics, Equipment
Reloading
Brass cleaning issue
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<blockquote data-quote="Frog4aday" data-source="post: 1682162" data-attributes="member: 9308"><p>Ammonia isn't great to use on your brass, but if everything is absolutely dry you will probably be okay, especially if a diluted mixture (touch of Brasso in with tumbling media.)</p><p></p><p>But we know that ammonia attacks copper, which makes it great for cleaning copper fouled barrels (Sweets 7.62 comes to mind.) Brass is an alloy of copper and zinc. So when you put ammonia (Brasso) in with your brass, the ammonia isn't doing it any favors (but it looks so pretty!)</p><p></p><p><strong><em>"The common metals are not affected by anhydrous ammonia. But, even if there is a little moisture, <u>ammonia will react rapidly</u> with copper, <u>brass</u>, zinc and many alloys, especially those containing copper and corrode them."</em></strong></p><p></p><p>Then there is this bit of info:</p><p><a href="http://bulletin.accurateshooter.com/2018/10/tech-tip-dont-store-brass-and-ammo-near-ammonia-solvents/" target="_blank">http://bulletin.accurateshooter.com/2018/10/tech-tip-dont-store-brass-and-ammo-near-ammonia-solvents/</a></p><p>Excerpt: </p><p><strong>"...long-term exposure to ammonia fumes can cause cracks to form in your brass. This can lead to case ruptures and possible injury. </strong></p><p><strong></strong></p><p><strong>This case-cracking phenomenon has been called <u>Season Cracking</u>, a form of stress-corrosion cracking of brass cartridge cases. Season cracking is characterized by deep brittle cracks which penetrate into affected components. If the cracks reach a critical size, the component can suddenly fracture, sometimes with disastrous results. If the concentration of ammonia is very high, then corrosion is much more severe, and damage over all exposed surfaces occurs. The brass cracking is caused by a reaction between ammonia and copper that forms the cuprammonium ion, Cu(NH3)4, a chemical complex which is water-soluble. The problem of cracking can also occur in copper and copper alloys such as bronze."</strong></p><p></p><p>Hey, the Brasso probably is diluted enough and at a low enough concentration, people PROBABLY won't have issues with it...but it does contain AMMONIA and that really isn't awesome for your BRASS cases in the long run.</p></blockquote><p></p>
[QUOTE="Frog4aday, post: 1682162, member: 9308"] Ammonia isn't great to use on your brass, but if everything is absolutely dry you will probably be okay, especially if a diluted mixture (touch of Brasso in with tumbling media.) But we know that ammonia attacks copper, which makes it great for cleaning copper fouled barrels (Sweets 7.62 comes to mind.) Brass is an alloy of copper and zinc. So when you put ammonia (Brasso) in with your brass, the ammonia isn't doing it any favors (but it looks so pretty!) [B][I]"The common metals are not affected by anhydrous ammonia. But, even if there is a little moisture, [U]ammonia will react rapidly[/U] with copper, [U]brass[/U], zinc and many alloys, especially those containing copper and corrode them."[/I][/B] Then there is this bit of info: [URL]http://bulletin.accurateshooter.com/2018/10/tech-tip-dont-store-brass-and-ammo-near-ammonia-solvents/[/URL] Excerpt: [B]"...long-term exposure to ammonia fumes can cause cracks to form in your brass. This can lead to case ruptures and possible injury. This case-cracking phenomenon has been called [U]Season Cracking[/U], a form of stress-corrosion cracking of brass cartridge cases. Season cracking is characterized by deep brittle cracks which penetrate into affected components. If the cracks reach a critical size, the component can suddenly fracture, sometimes with disastrous results. If the concentration of ammonia is very high, then corrosion is much more severe, and damage over all exposed surfaces occurs. The brass cracking is caused by a reaction between ammonia and copper that forms the cuprammonium ion, Cu(NH3)4, a chemical complex which is water-soluble. The problem of cracking can also occur in copper and copper alloys such as bronze."[/B] Hey, the Brasso probably is diluted enough and at a low enough concentration, people PROBABLY won't have issues with it...but it does contain AMMONIA and that really isn't awesome for your BRASS cases in the long run. [/QUOTE]
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