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<p>[QUOTE=&quot;-jeffB, post: 1387121, member: 27832&quot;]Most metals can be toxic if they&#039;re converted into soluble form. Zinc is bad because it&#039;s quite reactive, and even very weak acids attack it.</p><p><br /></p><p>The particularly nasty thing about copper-coated zinc is that it turns into a little battery, and that makes the zinc dissolve even more quickly than it otherwise would. So, instead of passing through the digestive system largely intact like most metal objects, a cent with scratches (or bite marks) can dump <i>lots</i> of zinc promptly into the gut and bloodstream.</p><p><br /></p><p>Copper-coated zinc coinage isn&#039;t likely to kill millions, but it really is a remarkably stupid idea.[/QUOTE]</p><p><br /></p>

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