[s-cars] Thermal properties of anodizing Aluminum

[J. Khang]

> Message: 12
> Date: Thu, 13 Feb 2003 08:37:47 -0700
> From: "mlp qwest" <mlped at qwest.net>
> To: mlbess at optonline.net
> Cc: s-car-list at audifans.com

> I'm open to suggestion as to how one assess the
> merits of Anodizing, apparently some loss, no idea
> how much, of thermal conductivity as a result of
> covering the 6061 or 6063 core with a TEM value of
> 7, vs. the base materials natural value of 171 to
> 193

Easy, do the sums. It depends on the thickness of the
'lagging' and the dimensions of the object being
insulated. For thin tubes, you can actually cause an
increase in heat transfer but unlikely in this case.

>, against the "gain" in thermal emisvity of going
> from @ 0.10 to 0.33 (NE of naturally Oxidized
> Aluminum) a Natural Emisivity value of 0.70 to 0.9
> for Anodized Aluminum.

At what temperature? Sums easily performed again.

> Apparently, FWIW the computer heat sink makers don't
> seem to have a lot of worries about the adverse
> effects of anodizing on conductivity heat transfer
> values for CPU heat sinks

They wouldn't, the oxide layer is negligibly thin.

Jonathan
'96 S6

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