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<p>[QUOTE=&quot;BadThad, post: 2416938, member: 17261&quot;]Generally true, but not completely. Verdigris in itself can provide feed materials. Think about it on a micro-scale, verdigris contains micro-components (i.e. acids, anions, etc.) that can contribute to a self-sustaining reaction. This is well known by ancient collectors with coins that have hydrochloric acid induced verdigris (i.e. the horrible, incorrect term called &#039;bronze disease&#039;). In chemistry, reactions occur in equilibrium, meaning they are never totally to completion. There is always evidence of the starting materials remaining, they may be minuscule, but they are there at some level. As things shift around due to the equilibrium, you have activity.</p><p><br /></p><p>Verdigris is quite complicated, while the formation forces at work, primarily on a macro-scale with air and water, you must also consider the dynamic electrochemistry involved. All metals exhibit micro-currents within them. Electrons are constantly flowing and the effect is exacerbated by temperature fluctuations. This drives electrochemical reactions on a micro-scale, which, given enough time, can eventually build verdigris to where you can see it if feed materials (old verdigris) are present.[/QUOTE]</p><p><br /></p>

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