powdercoating AL frame, compromise strength?
07-21-09, 07:58 PM
#1
T.A.N.D.
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powdercoating AL frame, compromise strength?
ive heard aluminum wheels on cars can be weakened from the heat process of powdercoating, and i was curious to know if anyone has any info for or against that claim? i want to change the color of the bike i just bought, and im unsure if i should just have it painted or p-coated.
07-22-09, 02:03 AM
#2
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I've never heard that before. Powder coating bakes the finish at approx 375 - 400 deg. If you decide to paint make sure your painter knows how to prep AL. You need a special primer to adhere to AL. Regular auto paint, designed for steel, will eventually blister and come off. https://www.paintcenter.org/rj/jan05h.cfm
https://www.ronjoseph.com/painting-aluminum.htm
https://www.google.com/products?sourc...title&resnum=5
Good luck.
https://www.ronjoseph.com/painting-aluminum.htm
https://www.google.com/products?sourc...title&resnum=5
Good luck.
07-22-09, 03:45 AM
#3
manonthemoon
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If your powdercoater knows what they're doing, alloy wheels should never have any chance of warping. Do your research and pick the right guy/shop.
07-22-09, 03:51 AM
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I just wanna ride
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I had my aluminum H+son rims powder coated locally. I don't think the rims are in any way weakened or at least they haven't shown any signs of weakness yet.
one thing to remember if your a weight weenie is that powder coating will weigh a good bit more than paint, a couple hundred grams maybe.
one thing to remember if your a weight weenie is that powder coating will weigh a good bit more than paint, a couple hundred grams maybe.
07-22-09, 05:55 AM
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I've never heard that before. Powder coating bakes the finish at approx 375 - 400 deg. If you decide to paint make sure your painter knows how to prep AL. You need a special primer to adhere to AL. Regular auto paint, designed for steel, will eventually blister and come off. https://www.paintcenter.org/rj/jan05h.cfm
https://www.ronjoseph.com/painting-aluminum.htm
https://www.google.com/products?sourc...title&resnum=5
Good luck.
https://www.ronjoseph.com/painting-aluminum.htm
https://www.google.com/products?sourc...title&resnum=5
Good luck.
Info found here.
https://www.metalbashatorium.com/heat..._aluminium.htm
07-22-09, 08:10 AM
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steel lover
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Yes, depending on the aluminum, the heat cycle can weaken it. I've heard this from a powdercoater who does lots of motorcycle stuff. He said he generally doesn't have a problem doing them once and doesn't turn the oven all the way up, but he generally avoids coating the same wheel multiple times.
Whether it's enough to effect a frame (either the rigidity requirements of a frame), grade of aluminum, or the process used on the aluminum (billet, spun, cast, etc).... I don't know.
Whether it's enough to effect a frame (either the rigidity requirements of a frame), grade of aluminum, or the process used on the aluminum (billet, spun, cast, etc).... I don't know.
07-22-09, 09:18 AM
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Anodizing is a stronger finish that won't affect tolerances nearly as much as powdercoating.
I'm relatively new to bicycles - why do some many people talk about powdercoating and now anodizing?
I'm relatively new to bicycles - why do some many people talk about powdercoating and now anodizing?
