[sdiy] Chemical Synth

[Martin Fay]

Glen wrote:
>Seriously though, has anyone tried to duplicate this effect yet? I don't
>have access to seawater in my area, and I'm not sure if table salt would
>work the same way. The basic idea seems too weird to actually work. I
>haven't any idea what phenomenon was actually causing the signal in that
>recording. Does anyone know how it works?

Going back a decade-ish I was a student in a corrosion science
laboratory. I think I've forgotten most of it, but with that cell I
would expect there to be pitting corrosion. This is a breakdown in the
surface oxidation on the aluminium at specific points which will
corrode a bit then reoxidise. This should cause the potential of the
cell to vary in some way. There is serious research going on studying
this electrochemical noise, I would expect there to be particular
frequencies characteristic of the cell.


Martin

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