Re: Sacrafical Anodes. Do They Have a Use?
The use of sacrificial anodes is to protect the material where you attach it to. The sacrificial anode is from a material which is lower in rank then for example the aluminum of your cylinder head or radiator and which will "corrode" away instead of your cylinder head.
Donīt know about what kind of electrical gremlins you are talking now, but using an anode for protection doesnīt make any difference in electrical problems from your car.
Here is the principle of sacrificial Anodes:
When two metals are electrically connected to each other in an electrolyte (cooling liquid), electrons will flow from the more active metal to the other, due to the difference in the electrical potential, the so called 'driving force'. When the most active metal (anode) supplies current, it will gradually dissolve into ions in the electrolyte, and at the same time produce electrons, which the least active (cathode) will receive through the metallic connection with the anode. The result is that the cathode will be negatively polarized and be protected against corrosion.
So in principle you can protect the aluminum parts of your engine by putting a Zinc Anode inside the cooling liquid (and electrically connected to the aluminum)