Originally Posted by elkhaven
R N R, have you vetted the source of the link? Is the claim of 20-40% loss correct? I have my doubts that it is, but as DBK so elegantly points out, even if it is true, does it matter?
I'd like to powder coat my frame, but I truly don't believe I'll ever be done tinkering with it and doing so post powder coat just seems like A PIA. I'm waiting on my first powder coated piece and at this point I'm leaning towards powder coating certain pieces, but not the whole frame. I guess I'll see...
Anyways I like a lot of what row-frame has to say and his stance in general, but I'm not convinced that all of his opinions are based on reality. I'd be curious what other metal minds think of the concept.
Source: SAS30 Specifications for Aluminum Structures awa Aluminum Standards and Data both Aluminum Association Publications.
Some of the annealment is from time and temperature and some from cooling. Powder coating generally brings the material to 220C and welding 1200C++. One can avoid much of the annealment by very slowly cooling the material at say 20C/hour. This will allow the bonds to redevelop in part.
Some powder coaters will roll the material out of the oven an in effect "quench" the metal and preventing the bonds from redeveloping. This will result in a T4 or T5 state.