[jman1310]

Has anyone tried using sacrificial metal to eliminate galvanic corrosion?
It would require bonding all metal parts in the cooling system together and to a zinc that is immersed in the cooling fluid. Zinc being the softest and weakest metal, it would get corroded first and "sacrifice" itself for the system.

Weak points include: where would the zinc precipitate, regular maintance of the zinc (if it gets heavily corroded it's ability to sacrifice itself is reduced), and the inconvience of bonding the system.

bonding = connecting the cooling system with wire, possibly the case could be used as a common ground

similiar systems are used on boats to prevent galvanic corrosion on gear in direct contact with water

jman