"Ignoramus32654" wrote in
message ...
I have certain copper pieces that I could use as electrodes for EDR.
I
am not sure if that is safe from environmental standpoint and
whether
copper would dissolve (I may later use them for different
purposes). Any ideas?

i



No need for copper - a steel plate works fine but will be sacrificed
over time. I've seen people say don't use stainless steel as that
makes for an environmentally nasty electrolyte to dispose of.

AWEM