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Old 13th Sep 2017, 8:28 am   #26
Bazz4CQJ
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Join Date: Apr 2009
Location: Oxfordshire, UK.
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Default Re: Re-anodising heatsinks?

Quote:
Originally Posted by Craig Sawyers View Post
The color of the anodized finish makes little impact on emissivity since most radiational heat loss occurs at wavelengths higher than visible light.
You sometimes see heatsinks which have been painted black. I have always wondered about the trade off between the effect of the colour on improved radiation, and the thickness of a layer of paint reducing conductivity.

From what you say, it seems possible that painting something black could actually be detrimental from a thermal standpoint? Probably not a big effect, just a waste of time?

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