DC current and Oxidation Question

[teslatek]

Hey everyone i'm new to the technical side of the electronics world, i watched Daves tear down of that electronic rust protection scam unit and i was wondering,   if the vehicles chassis was not used as dc ground , like if each wire that uses the negative chassis ground was cut and rewired to a junction that connected to battery's negative terminal  instead of grounding to the frame would that potentially lower the amount of rust that would accumulate over time , i know it wouldn't be cost effective to do this but would it work? , i set up a nice lab and machine shop a year or so ago so i have all the gear to run tests and custom build whatever i need , any help would be greatly appreciated , thanks

[Zero999]

Hey everyone i'm new to the technical side of the electronics world, i watched Daves tear down of that electronic rust protection scam unit and i was wondering,   if the vehicles chassis was not used as dc ground , like if each wire that uses the negative chassis ground was cut and rewired to a junction that connected to battery's negative terminal  instead of grounding to the frame would that potentially lower the amount of rust that would accumulate over time , i know it wouldn't be cost effective to do this but would it work? , i set up a nice lab and machine shop a year or so ago so i have all the gear to run tests and custom build whatever i need , any help would be greatly appreciated , thanks

Yes, I believe not using the vehicle chassis as a current carrying conductor would cut down on corrosion. Using the chassis for return current is prohibited in military vehicles, but that could be to comply with the stringent EMI standards, more than reducing corrosion.

Irrespective of the above, it's still a good idea to connect the negative terminal to chassis, because it stops the electrical system from floating at potentially high voltages.