Quote:
Originally quoted by Since87
Yep, those were the things I was thinking of, but then you mentioned threads, and that reminded me that there is most likely an electrical connection between the baseplate and the top through the screws.
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That is hitting the nail on the head. The battery effect is reliant on different metals paired in some type of conductive solution. In the water blocks we a discussing these two different metal are aluminum and copper. In this type of environment the aluminum will start releasing ions into the water; adding de-ionized water will not help. The water will no longer be de-ionized once the aluminum begins releasing ions. The galvanic action will corrode the aluminum faster than the copper. To make a very long explanation short, Shorting the two metal on a small scale like this tends to slow down the battery effect add anodizing on top of this and the process is further retarded. Run a wire from your block to the radiator and the whole system is an electrical short. I think someone else in the forum came to the same conclusion I did by means of theory and testing (#Rotor I think).