Yeah I read through that thread as well. I was actually wondering...if and when this would come up here as a

 

[my reply to the referenced thread, snipped from that thread]
Didn't we just have a thread on this?
Here it is: https://www.s2ki.com/forums/index.ph...c=718603&st=50

Pretty much all sand-cast, permanant mold cast, and forged wheels, the aluminum gets its strength properties from heat-treatment. Additional heating in a powder-coating process not tailored for heat-treated aluminum alloys can GREATLY degrade the wheel's strength and fatigue life.

 

My reply to the other two "new" threads on this:
<snip>Didn't we just have a thread on this?
Here it is: https://www.s2ki.com/forums/index.ph...c=718603&st=50

Pretty much all sand-cast, permanant mold cast, and forged wheels, the aluminum gets its strength properties from heat-treatment. Additional heating in a powder-coating process not tailored for heat-treated aluminum alloys can GREATLY degrade the wheel's strength and fatigue life.
<snip>

Regarding wheel manufacturers that powdercoat, you can rest assured that the process they use takes into account the heat-treatment of the alloy. For all I know, the powdercoating process could be part of the heat-treatment. Anyway, that manufacturers powdercoat wheels does NOT mean that it is OK to take your aluminum wheels to the powdercoater. If they don't have their process tailored for heat-treated aluminum wheels, to ensure they don't destroy the strength properties, bad things can and do result...

 

^ what he said

 

I thought ploney's picture and the link I ref'd were the most striking example I've seen / heard.

There are a lot of things you're "not supposed to do."

This in my head now goes up to a "NOT SUPPOSED TO DO."

35 autocross runs is nothing. Pretty scary.

 

What they said.

Saying "Honda powdercoats their wheels" is akin to saying "Burger King grills their burgers, so it's ok to grill them again." Just because something is done once as part of the manufacturing process doesn't mean it's necessarily safe to do again post-manufacturing.

 

 

[QUOTE=ZDan,Aug 21 2009, 04:29 AM] Pretty much all sand-cast, permanant mold cast, and forged wheels, the aluminum gets its strength properties from heat-treatment. Additional heating in a powder-coating process not tailored for heat-treated aluminum alloys can GREATLY degrade the wheel's strength and fatigue life.
<snip>

Regarding wheel manufacturers that powdercoat, you can rest assured that the process they use takes into account the heat-treatment of the alloy.

 

Are you sure that the powder coating is done as part of the manufacturing process?

Once again, it doesn't mean it isn't.

 

Since we're talking about BK..lol
I dont know more than what ive been told about tracking powder coated rims but, I would never cook food twice..lol.
I would warm up though!

Check the link I posted above. I has another link about materials and their properties.

http://www.eng-tips.com/viewthread.c...=151053&page=7