Pro/Forums - View Single Post - PurpleIce vs RedLine testing... WTF!!! do they CAUSE corrosion?

Brad · 01-22-2002, 03:17 PM

the black coating may protect the Al from corrosion, but does it still transfer heat effectively? It is most likely Al2O3, or AlO, which is aluminium oxide or something like that (trying to remember from chem classes 3 years ago)

I've tried to dig up thermal conductivity values for these, but no go so far.

Another thing that may be interesting to you is that it is most likely a very very thin layer of Aluminium Oxide, which isn't likely to affect temps too much at all. I know Joe is going to ream my arse for posting this link, but it does show that a thin layer of a not-very conductive metal mightn't affect temps at all. http://www.cluboverclocker.com/revie...ckel/index.htm

here we see nickel is only 98W/m-k, while copper is around 400. The testing shows they perform exactly the same, which I think is due to the ultra thin layer of nickel.

Now, lets assume this level of Aluminium Oxide is only a couple of microns thick. Unless it has an incredibly poor thermal conductivity, like less that 30 or something, I can't see it affecting temps too much at all.

Thoughts? Comments? Abuse?

01-22-2002, 03:17 PM	#52
Brad Thermophile Join Date: Oct 2001 Location: Nuu Zeeelin Posts: 3,175	the black coating may protect the Al from corrosion, but does it still transfer heat effectively? It is most likely Al2O3, or AlO, which is aluminium oxide or something like that (trying to remember from chem classes 3 years ago) I've tried to dig up thermal conductivity values for these, but no go so far. Another thing that may be interesting to you is that it is most likely a very very thin layer of Aluminium Oxide, which isn't likely to affect temps too much at all. I know Joe is going to ream my arse for posting this link, but it does show that a thin layer of a not-very conductive metal mightn't affect temps at all. http://www.cluboverclocker.com/revie...ckel/index.htm here we see nickel is only 98W/m-k, while copper is around 400. The testing shows they perform exactly the same, which I think is due to the ultra thin layer of nickel. Now, lets assume this level of Aluminium Oxide is only a couple of microns thick. Unless it has an incredibly poor thermal conductivity, like less that 30 or something, I can't see it affecting temps too much at all. Thoughts? Comments? Abuse?