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posted on June 24th, 2003 at 09:33 PM
Aluminum Panels (not VW)
I was checking a car on the weekend, bonnet, boot & doors had this weird bubbling all over and I mean all over. Looked like the rust bubbling you
would get around normal door bottoms or sills but simply everywhere. The owner said those panels were aluminum and weren't prepaired properly but
its not rust. Just chemical reaction which causes the paint to bubble. Is this true? Any damage to the panels or simply they just need stripping and
repainting properly?
Cheers
Raf
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posted on June 25th, 2003 at 08:38 AM
Ali probs
Steel Rusts,,,, Ali oxidizes. Its lost its protective coating. Happens when air gets to the metal. Big job,looks like a white powder, and will brush
off with your hand. If you put a brass coin or screw on the metal it will eat through in no time......
Never Rushed
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posted on June 25th, 2003 at 08:38 AM
Ali probs
Steel Rusts,,,, Ali oxidizes. Its lost its protective coating. Happens when air gets to the metal. Big job,looks like a white powder, and will brush
off with your hand. If you put a brass coin or screw on the metal it will eat through in no time......
Never Rushed
karmannghia60
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posted on June 25th, 2003 at 09:49 AM
So panels need stripping, protection then re-spraying? Why do you say its a big job? Would the panels be damaged?
helbus
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posted on June 25th, 2003 at 07:32 PM
Quote:
Steel Rusts,,,, Ali oxidizes.
Rust is oxidisation - iron-oxide
The bubbles on the panels may be humidity blisters which is not necessarily reaction to the aluminium, but humidity that was trapped either between
the metal ant the primer, or between the primer and topcoat. If the vehicle was puttied, this adds another possible layer.
If the bubbles are under the primer, then it is possible the aluminium has corroded.
The only fix in any of these cases is to fully remove all traces of the defective products.
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posted on June 25th, 2003 at 08:00 PM
Ali
Yep,,,, sorry,, Another thing is if the panels are attached wrong they will fail, because of two disimiliar metals in contact with each other, to far
apart on the galvanic scale. The metal will pit deeply, where a rusted part has protection in a small way from the rust itself, the ali won,t. think
that's right.....2c worth anyway:bounce
posted on June 25th, 2003 at 08:00 PM