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Old 2007-07-16, 03:05 PM   #11
sperry
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Real Name: Scott
Join Date: Nov 2002
Location: Portland, OR
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Car: '09 OBXT, '02 WRX, '96 Miata
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Quote:
Originally Posted by AtomicLabMonkey View Post
I don't know enough about the powder coat process to know for sure one way or the other, and I'm no expert in metallurgy. That said, I would be at least be cautious and read up before potentially screwing up the heat treatment on the wheels with a 400F process. As far as I know the annealing temps for most Al alloys are in a range of like 300-700F, applied over a few hours.

And even if you have a 1200F brake rotor temp, that doesn't mean the wheel will be 1200F, the wheel temp will be much lower (Al melting points are like 900-1200F).
I figure if my brakes are getting to 1000F (an educated guess based on the performance and temp range of the pads I use), the mating surface of the wheel has to be in the several hundreds F range.

Also, I don't know that powder coating is really 400F... I'm just making up stuff. Wikipedia says most powder coating cures at 200F, but I thought I saw 400F somewhere in the past.
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