I understand that when copper is in contact with galvanized steel, and an electrolyte present, the zinc acts as an anode, as it wants to ‘give’ its electrons over to the copper. But brass already has zinc present and is stable, so why would galvanic action occur between these two metals?
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One material is less ‘noble’ than the other, therefore ion transfer occurs to try & get equal, causing degradation. That’s about as simple as I can make it.
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