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Forum index » Science and Technology » Chem » Coatings
Effects of Paint on a Heat Sink
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Andy11
science forum beginner


Joined: 08 Sep 2005
Posts: 12

PostPosted: Fri Dec 02, 2005 4:31 am    Post subject: Re: Effects of Paint on a Heat Sink Reply with quote

Martin Brown wrote:
Quote:
A Espinoza wrote:

Montie wrote:

Morning All,

I'm working on calculating the the thermal effects of painting an
aluminum heat sink. Anyone have any suggestions on where I can find
any of the following:

- literature or website about the effects of paint on heat sinks
- a listing of the thermal conductivity of any paint

Any suggestions?


Anodising with a black dye instead?

My question for you is why would you want to paint a heat sink?
Most polymers are good insulators, as are the majority of pigments
used in paints. Painting the heat sink would just put an insulating
layer on it and reduce the heat transfer rate.


For a forced air cooling system that would certainly be true. But a
passive radiating heatsink would be cooler if covered in a thin coat of
paint instead of bare metal (a lousy radiator of IR).

Regards,
Martin Brown
Have you considered black anodization to improve radiation without

adding a painted coating?
Andy Estes
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Martin Brown
science forum addict


Joined: 12 May 2005
Posts: 82

PostPosted: Tue Nov 29, 2005 8:42 am    Post subject: Re: Effects of Paint on a Heat Sink Reply with quote

A Espinoza wrote:

Quote:
Montie wrote:

Morning All,

I'm working on calculating the the thermal effects of painting an
aluminum heat sink. Anyone have any suggestions on where I can find
any of the following:

- literature or website about the effects of paint on heat sinks
- a listing of the thermal conductivity of any paint

Any suggestions?

Anodising with a black dye instead?

Quote:
My question for you is why would you want to paint a heat sink?
Most polymers are good insulators, as are the majority of pigments used
in paints. Painting the heat sink would just put an insulating layer on
it and reduce the heat transfer rate.

For a forced air cooling system that would certainly be true. But a
passive radiating heatsink would be cooler if covered in a thin coat of
paint instead of bare metal (a lousy radiator of IR).

Regards,
Martin Brown
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A Espinoza
science forum beginner


Joined: 14 Sep 2005
Posts: 19

PostPosted: Mon Nov 28, 2005 11:41 pm    Post subject: Re: Effects of Paint on a Heat Sink Reply with quote

Montie wrote:
Quote:
Morning All,

I'm working on calculating the the thermal effects of painting an
aluminum heat sink. Anyone have any suggestions on where I can find
any of the following:

- literature or website about the effects of paint on heat sinks
- a listing of the thermal conductivity of any paint

Any suggestions?

Thanks,
Montie Roland
montie@montie.com
Montie Design
www.montie.com


My question for you is why would you want to paint a heat sink?
Most polymers are good insulators, as are the majority of pigments used
in paints. Painting the heat sink would just put an insulating layer on
it and reduce the heat transfer rate.
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Montie
science forum beginner


Joined: 28 Nov 2005
Posts: 1

PostPosted: Mon Nov 28, 2005 4:22 pm    Post subject: Effects of Paint on a Heat Sink Reply with quote

Morning All,

I'm working on calculating the the thermal effects of painting an
aluminum heat sink. Anyone have any suggestions on where I can find
any of the following:

- literature or website about the effects of paint on heat sinks
- a listing of the thermal conductivity of any paint

Any suggestions?

Thanks,
Montie Roland
montie@montie.com
Montie Design
www.montie.com
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