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Author Topic: Can Copper Oxidation causes problem in heat transfer ?  (Read 1098 times)

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munna

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Can Copper Oxidation causes problem in heat transfer ?
« on: July 15, 2015, 06:39:48 AM »

The tip of my cpu heatsink got black.i think it's tarnishing.So can copper-oxide causes problem in heat transfer ? And if it does how do i prevent it ?
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Enthalpy

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Re: Can Copper Oxidation causes problem in heat transfer ?
« Reply #1 on: July 15, 2015, 10:06:44 AM »

Hi Munna, welcome here!

You mean, heat transfer from copper to air? No worry with copper oxide or any tarnishing there. This transfer is limited by the properties of air; solids are so much better that their effect is negligible.

Just for comparison: air at room temperature conducts some 0.025W/m/K, pure copper 390W/m/K, most oxides 1 to 10W/m/K, so a thin oxide later is negligible. Transfers to air work because turbulence brings fresh air near to the solid. If air is immobilized, say by some foam, it becomes an excellent insulator, better than brick for instance.
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munna

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Re: Can Copper Oxidation causes problem in heat transfer ?
« Reply #2 on: July 15, 2015, 10:40:05 AM »

that is very useful info.Thank you so much for the information :)
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