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  1. #11
    Senior Member Bladerunner's Avatar
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    Metals, once solid, are really crystals and continue to grow on the most available lattice. This could be a scratch on a smooth metal surface that creates a raised point. This point has a minimum number of molecules and exposes the metal's lattice allowing growth to begin;usually as rust once available O2 is in the mix. Or, along the line of a razors edge where the metal has been shaped to its minimum area of exposure.

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    mrsell63 (03-11-2011)

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