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Originally Posted by Fred
Esteban,what about aluminium? it is a metal wich oxydes rapidly and is reactive.
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Quote:
Originally Posted by Fred
Interesting : Bronze yes, aluminium no,iron not much, this is a clue!
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Quote:
Originally Posted by Esteban
If the bronze is round as coin or buttons, round form, or circular as buckle, better.
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This dependence on physical shape would imply that eddy currents are an important aspect in detection ... but, at the distances you are discussing, any eddy currents would be miniscule and undetectable.