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I thought that the rusting process causes a reaction (electrolysis) and I'm not sure which metal is the cathode (anode ?)
These electronic systems have a piece of metal (cathode, anode ?) that rusts instead of the actual metal on the car. I'm trying to remember back to high school chemistry but that was along time ago !
I'm sure someone with more knowledge on this matter will chime in.
Sandeep
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