[GreenKeys] [External] Re: WU 28ASR WIRING

[Jones, Douglas W]

From: Jim Haynes [jhhaynes at earthlink.net] -- Sunday, February 14, 2021 8:36 AM

> I think this has something to do with corrosion.  See electroplating.
> The negative electrode attracts metal ions, whereas the positive electrode
> pulls them away from the metal, eating away at it.

Exacty.  This was a huge issue in the era of electric street railways, where current leakage from the track to gas pipes parallel to the track caused rapid corrosion and gas leaks.  They quickly learned to keep everything positive with respect to the gas pipes.

       Doug Jones
       jones at cs.uiowa.edu