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<p>[QUOTE=&quot;rlm&#039;s cents, post: 408026, member: 7957&quot;]There are lots of exterior uses for zinc.&nbsp; It oxidizes very easily, but the oxide coats it to prevent further oxidation.&nbsp; i.e. galvanized pipe that does not rust.&nbsp; BTW, aluminum does the same thing.&nbsp; It is a very good exterior material so long as it does not contact salt, but it is so reactive that it has been used as rocket fuel.&nbsp; Don&#039;t believe me.&nbsp; Look it up.</p><p><br /></p><p>Back to copper.&nbsp; It is so reactive that they use it for water pipes.&nbsp; It is so reactive there that it lasts for decades.</p><p><br /></p><p>As for your link, I will give you no argument that copper is more reactive than most other coinage materials (except zinc and steel).&nbsp; However, coinage materials are selected because they are non-reactive.[/QUOTE]</p><p><br /></p>

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