Thread: Kit car rant--Cobra vs. 'glas streetrod

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You can get the same thing in an aluminum radiator in a steel frame.

Stovens, That is an interesting idea but it won't work using Zinc. Aluminum is already a more active metal than Zinc. The only way it might work is to use Magnesium which is more active than Aluminum. I have seen the same problem where folks use a Zinc anode on a boat with an aluminum hull when they should use an old mag wheel or a VW-4 engine block on the anchor chain. By the way a VW engine from a junk yard where it has had a chance to get water into the block should be inspected internally for "milk of magnesia" white slurry which is the result of magnesium reacting with water to form Magnesium hydroxide; iron rust is red but magnesium "rust" is white.

Don Shillady
Retired Scientist/teen rodder

Don I was taking a guess at zinc, couldn't remember what they used on the out boards! Interesting on the VW's!