Re: Aluninum heat transfer rate.
Like Hvac said, Powder does reduce the heat transfer. Anno does a little too, but not any measureable amount. I have seen alot of heatsinks for various thengs anno's. Heck, all car audio amplifiers are anno'd. My RC car's Nitro engine heatsinks are anno. I have removed the anno before and have seen no measureable effects on the temp of the engine. The engines run at approx 230-260F
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