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Hi, just thinking about a possible project and it may involve bolting aluminium plates together and putting a very small voltage across them.
If I take two plates of aluminium, leave them to oxidise in air (we all know Al forms a surface layer) then is there a minimum voltage that will flow between the plates?
I have read various accounts that say this layer is broken as an electric field forms across it, but does that mean there is a minimum that does this? Or is the aluminium oxide metallic and will conduct?
If I take two plates of aluminium, leave them to oxidise in air (we all know Al forms a surface layer) then is there a minimum voltage that will flow between the plates?
I have read various accounts that say this layer is broken as an electric field forms across it, but does that mean there is a minimum that does this? Or is the aluminium oxide metallic and will conduct?