Quote:
Originally posted by theetruscan
You're wrong. Sorry.
I have heard conflicting information on this, so I will not claim to know why, but water wetter improves cooling when added to water (the common claim I have seen is reduced surface tension, but I don't know).
http://www.redlineoil.com/redlineoil/wwti.htm - look about 1/2 way down.
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...and that would be true, if you were using it in an engine's cooling system, where the part you're trying to cool is so hot, that it boils the coolant. (which WW is very good at reducing, hence the improved cooling).
But we're talking about a PC here, not an engine block.
Water temps hardly go over 30 C, and we're able to maintain the CPU temp about 10 deg C above that (worst case), so 40 deg C is the highest temp the coolant will ever face.
So if the additive contains, for example, mineral oil, then the water's viscosity will be ever so slightly higher (averaged out), which will increase the thickness of the boundary region, and reduce the cooling effectiveness.
But it won't corrode.
If you came across the WC101 article, see my comments about it.