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<p>[QUOTE=&quot;Leadfoot, post: 535398, member: 2972&quot;]It was the nitric acid that dissolved the coin, not the air or water, per-se.</p><p>&nbsp;</p><p><br /></p><p><br /></p><p>It is my understanding that there are sulfates in the air normally.&nbsp; That and humidity/water combine to be reactive to copper.&nbsp; Thus if you remove the sulfates/cholrates and/or the humidity, you&#039;ve essentially stopped the corrosion.[/QUOTE]</p><p><br /></p>

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