Liquid Cooling System: Which Metal Tubing Should I Use?

Daniel Johnson

Honorable
Apr 22, 2013
246
0
10,690
What are the best metals to use for a liquid cooling system's tubing?
Would it be something like copper with a very high thermal conductivity, or something like stainless steel with a very low thermal conductivity?

I'm asking because if copper were to be used, then the hot exhaust coolant would be able to be cooled by the internal air flow cooling the pipes. However, the already-cooled (via radiator) coolant would be heated by the internal air flow.

If stainless steel were to be used, then the hot exhaust coolant would not be able to be cooled by the internal air flow (since the heat cannot get through to the outer layer of stainless steel), which allows for complete heat retention in the coolant. However, the already-cooled (via radiator) coolant would not be heated by the internal air flow.

Could I use stainless steel tubing for the cooler coolant side, and copper tubing for the heated coolant side, or would this cause corrosion over time like mixing aluminum and copper does?

Thank you all for any help given
 
Solution
I would try to match the metal of the radiator and hard lines as well as your cooling plate to eliminate the reaction of different metals. Mixing and matching and over complicating things could just be a source of issues. There might be some difference between copper and stainless or aluminum but doubtful enough to make a major impact. Radiator size and fan performance will have a much larger impact.
I would try to match the metal of the radiator and hard lines as well as your cooling plate to eliminate the reaction of different metals. Mixing and matching and over complicating things could just be a source of issues. There might be some difference between copper and stainless or aluminum but doubtful enough to make a major impact. Radiator size and fan performance will have a much larger impact.
 
Solution