Carmods@aol.com wrote:
> Hi Steve,
> Thanks for your chemical description of galvanic reaction.
>
> Would a zinc or magnesium rod inserted in the top of the reservoir tank of a
> system with a copper radiator and an aluminum engine reduce the galvanic
> reaction? Should the rod be grounded to the engine block, the copper
> radiator, the reservoir tank or isolated from both?
> John Logan
John,
Yes, it would, and yes it must be grounded though the tank/straps/body so make
sure the mounting straps contain a good electrical connection (no paint) to the
tank (no paint) over some reasonable length. There are conductive greases used
for electronic equipment that may be available through an good electronics
store,
as well. If you do this in a reachable location, you can spray the assembly to
seal the top area and joints from weather, or maybe underneath with a silicone
bead around the tank bare batch.
Another approach, and maybe better, would be to take the tank out and silver
solder/braze a copper stud to the tank and make a grounding strap. No corrosion
worries on the bare steel.
The J.C. Whitney device is made to ground through the radiator cap, and can be
removed through it. Nothing I've found at a boat store seemed to fit.
Steve
--
Steve Laifman < Find out what is most >
B9472289 < important in your life >
< and don't let it get away!>
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