Quote:
Originally posted by Sapientiea
Hi Guys!
I'm new and im reading through the watercooling topics for the first time, when i read this topic. I have a solution for the battery effect. Like has been said before, the two metals will release ions in the water and subsequently the battery effect will occur.
Now if you add a thirth metal (for instance: lead or common iron) the battery effect will occur on the least noble metal, in this case lead or iron!!
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Galvanic corrosion will corrode the most
electronegative metal. If you look at this
Table of Standard Electrode Potentials you will see that only a few metals have a more negative electrode potential than aluminum, and of those, the only one that is 'practical' to use is magnesium. (I already mentioned this in the post right above yours.)
To be useful, the magnesium needs to be wired to the aluminum, (or otherwise connected with an electrical conductor) and the wire used can't be exposed to the water.