Hantsflyer27
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Paintwork On AA Aircraft

Thu Jan 05, 2006 11:06 pm

Can anyone answer a question for me??? What are AA airliners finished with??? Other than the strips and the logo, it just looks like polished metal. If this is the case, what stops corrosion? Is there actually a chrome effect paint they use? I thought and unfinished aircrafts body was green..once the protective painted had been applied to body.

Your thoughts on this would be appreciated. Many thanks.

Regards, HF
 
Hantsflyer27
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RE: Paintwork On AA Aircraft

Thu Jan 05, 2006 11:08 pm

....and apologies if this has already been discussed, i tried to do a search but couldn't find anything....

regards HF
 
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Starlionblue
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 12:00 am

Quoting Hantsflyer27 (Reply 1):
....and apologies if this has already been discussed, i tried to do a search but couldn't find anything....

Good call saying that. It's been discussed numerous times. Big grin

I believe it's a transparent coat that goes over the body panels. AA also requests the panels to be from the same batch or something. On composite parts, the planes are painted grey.

The green paint you see on unfinished aircraft protects the metal. As far as I know it's stripped before the final paint is applied.
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MrChips
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 4:52 am

Quoting Starlionblue (Reply 2):
The green paint you see on unfinished aircraft protects the metal. As far as I know it's stripped before the final paint is applied.

The green coating is actually a plastic-like coating that comes off rather like rubber cement, if I recall correctly. Also, it is only found on Boeing aircraft, since they use clad aluminum. Airbus uses anodized aluminum for most their aircraft, so they roll out of the factory with a coat of yellow chromate primer on them.

Incidentally, it is not possible to get a bare metal finish on any Airbus model after the A320, as the anodized aluminum is not supposed to be polished.
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miamiair
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 5:00 am

When the original A300 came out, the skins were bare, i.e., there was no clad on them. And corrosion was a MAJOR issue.

Any metal skin may be polished, look at AF1. A clear conversion coating may be applied to inhibit corrosion.
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474218
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 8:34 am

Boeing uses Alclad aluminum for the fuselage skins. Alcald is a thin layer of pure aluminum applied the aluminum alloy to provide corrosion protection. Pure aluminum dose not corrode while alloyed aluminum does. AA does nothing more than polish their fuselage skins to a high gloss. A chemical treatment called Alodine 1000 can also be applied to assist with the corrosion protection, as it is possible to polish through the Alclad coating and exposing the underlying alloy.
 
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HAWK21M
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 12:28 pm

Is AA The only Airline opting for Polish rather than paint.Although a few AI B747s have the lower fuselage polished too.
regds
MEL
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474218
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 1:27 pm

Quoting HAWK21M (Reply 6):
Is AA The only Airline opting for Polish rather than paint.Although a few AI B747s have the lower fuselage polished too.
regds

Air Canada has stripped the paint from a B767 as a test and Eastern stripped their fleet (except the A300's) back in the late 1980's. Eastern B757's came from the factory polished.

I remember when Lockheed was still building L-1011's we actually polished some of the Alclad off the belly skins of a Delta plane, because they wanted them to shine.
 
Newark777
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 1:42 pm

Quoting HAWK21M (Reply 6):
Is AA The only Airline opting for Polish rather than paint.Although a few AI B747s have the lower fuselage polished too.
regds
MEL

DL's lower fuselage is also polished.


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And many cargo carriers have polished planes.


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ha763
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 6:32 pm

Aeromexico is another one with bare metal


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HA's ex-AA DC-10s also were bare metal


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HAWK21M
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RE: Paintwork On AA Aircraft

Fri Jan 06, 2006 10:37 pm

Amazing.Thanks for the pics.Out here We rarely get to see those polished Aircraft.What would be the frequency of polishing.
regds
MEL
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avioniker
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RE: Paintwork On AA Aircraft

Sat Jan 07, 2006 6:40 am

Polishing is done with pneumatic rollers at C check. Takes about a day for a 737 or MD
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AAR90
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RE: Paintwork On AA Aircraft

Sat Jan 07, 2006 3:23 pm

Quoting Hantsflyer27 (Thread starter):
What are AA airliners finished with??? Other than the strips and the logo, it just looks like polished metal.

Correct. Matched polished metal.

Quote:
If this is the case, what stops corrosion?

Washing & polishing is all AA does.

Quote:
Is there actually a chrome effect paint they use?

Nope. Just polish the bare metal.

Quoting Avioniker (Reply 11):
Polishing is done with pneumatic rollers at C check. Takes about a day for a 737 or MD

Or less.  Wink
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eksath
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RE: Paintwork On AA Aircraft

Sat Jan 07, 2006 4:22 pm

Quoting AAR90 (Reply 12):
Just polish the bare metal.

..and what a good job they do!

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KevinL1011
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RE: Paintwork On AA Aircraft

Sat Jan 07, 2006 4:30 pm

Paint is heavy. The B29 went over original design weight and was unpainted to salvage payload capabilities.
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HAWK21M
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RE: Paintwork On AA Aircraft

Sat Jan 07, 2006 5:36 pm

Quoting Avioniker (Reply 11):
Polishing is done with pneumatic rollers at C check

What Polish type.
Also what would the Paint Penalty saved on say a B747.
regds
MEL
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Hantsflyer27
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RE: Paintwork On AA Aircraft

Sat Jan 07, 2006 7:48 pm

Great responses, thankyou all.

I guess having your fleet finished in a polished aluminium could benefit in two ways. Firstly, are there any weight savings not using paint??? I'm guessing that coating a large jet like a 767 or 777 could use many KG of paint. Does anyone know more on this? And secondly, i guess it would be easier to inspect the body of an aircraft for stress fractures etcs....is this a factor? Any thoughts on that would be great.

I would also think a clean and re-polish would be substantially cheaper to do than a repaint.

Once again, thanks for replies.

Regards, HF
 
avioniker
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RE: Paintwork On AA Aircraft

Mon Jan 09, 2006 11:04 pm

Quoting HAWK21M (Reply 15):
What Polish type.
Also what would the Paint Penalty saved on say a B747.
regds
MEL

In 1992 the -200 I was involved with came out 3125 pounds heavier after paint. (DC-10's I used to work had a 2200 pound paint job so I wonder at the accuracy of the 747 weight, but that's what we got on the final weigh.)
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
 
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HAWK21M
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RE: Paintwork On AA Aircraft

Tue Jan 10, 2006 12:53 am

Quoting Avioniker (Reply 17):
In 1992 the -200 I was involved with came out 3125 pounds heavier after paint.

Considering the savings in weight.Why so few Airlines have opted for polish.
regds
MEL
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EMBQA
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RE: Paintwork On AA Aircraft

Tue Jan 10, 2006 2:10 am

Quoting HAWK21M (Reply 18):
Considering the savings in weight.Why so few Airlines have opted for polish.

The labor hours to keep it looking good.....
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LY4XELD
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RE: Paintwork On AA Aircraft

Tue Jan 10, 2006 5:20 am

Quoting Avioniker (Reply 11):
Polishing is done with pneumatic rollers at C check. Takes about a day for a 737 or MD

I don't know what they use, but I watch them do it on the 777's and 767's here at AFW. It will take at least 2 days to complete the fuselage and then they continue to clean and polish the wings.
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