Does cathodic protection work for cars?
Cathodic protection works only if there is an electrolyte that carries current between the item to be protected and the galvanic anodes as for example in a pipeline buried in soil or a pipeline in seawater. cathodic protection can’t be applied in a car since there is not electrolyte, the car is immersed in air… you can find someone on the net stating that is possible to use CP on a car but is not true..
http://www.corrosionist.com/Corrosion_Control_Methods_Cathodic_Protection.htm
Vitt
I don’t believe this will work, as I have heard of some that have tried. The problem I believe is that cathodic protection works best when the metal is totally immersed in the water. And even then, the water needs to be of a high salt content in order to conduct enough electricity to make cp work. I don’t believe your vehicle would have enough moisture and would dry out from time to time ruining the effect and would also not have enough salt content for the required conductivity. Also, not sure how this all plays into it, but generally the DC power sources that are used at very low voltage, like less than 1 volt.
