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Old 06-09-2008, 12:33 AM   #1
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Aluminum Corrosion?

I hope this question is appropriate for this section.

After gutting the interior down to replace the floor, there is white powder like substance on a few areas of the interior areas (see picture). I used sand paper to scuff off the residue as much as I could (after picture).

Question: Should I be concerned with trying to neutralize it? If so, how? Or, should I not worry to much about this condition. The problem areas will be under the floor (belly pan), and behind the interior walls. Once I close all this up, there is no turning back. I tried a little vinegar solution, but it did not look any better. So I used sand paper. Opinions?



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Old 06-09-2008, 09:56 AM   #2
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The only really good way to stop this is to separate the components and then sandblast with a fine media and then prime with a good primer. If left alone it will continue to corrode
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Old 06-09-2008, 11:27 PM   #3
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Thanks for the suggestion. Blasting would probably be the best solution. I do own a portable sand blaster, but don't know enough about the proper material/method of blasting with a softer powder. I hope to find some type of solution that will help neutralize it before primer.

I found this basic info for anyone interested in this topic:
How To Remove Corrosion From Aluminum | eHow.com

Seems like an easy guideline to follow. Will do more searching on the internet.
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Old 06-09-2008, 11:33 PM   #4
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I've found this on some of my interior panels too. Here's how some of us are addressing corrosion on the exterior. The same methods should work on the interior. http://www.airforums.com/forums/f441...ion-42083.html
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Old 06-10-2008, 01:08 AM   #5
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Todd,
Appreciate the thread reference. I was reading it earlier today. The exterior polishing poses other questions, and will address my challenges after reading more of the polishing topics. My trailer is older than most Airstreams. So the level of oxidation on the exterior is more than most, being a 1947. I don't think it was ever maintained since it was made.
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Old 06-10-2008, 06:31 AM   #6
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It may be that your trailer is not made of the Alclad material that early Airstreams were made from. It may be just 2024 which is much more prone to corrosion. For interior areas that might have high humidity or condensation, I would paint it with a aluminum primer to prevent future damage. The exterior may require more frequent polishing and a protective coat of acrylic car wax. You need to determine what the trailer is made from before you go to far. There is a lot of history on the net if you search properly.
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Old 06-10-2008, 07:44 AM   #7
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Its most likely made from 24S dura aluminun
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Old 06-10-2008, 10:10 AM   #8
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Quote:
Originally Posted by monocoque View Post
I've found this on some of my interior panels too. Here's how some of us are addressing corrosion on the exterior. The same methods should work on the interior. http://www.airforums.com/forums/f441...ion-42083.html
Todd, I am beginning to think your trailer was parked on the same beach as mine. Of course only longer.
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Old 06-10-2008, 10:21 AM   #9
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Quote:
Originally Posted by cuyeda View Post
Todd,
Appreciate the thread reference. I was reading it earlier today. The exterior polishing poses other questions, and will address my challenges after reading more of the polishing topics. My trailer is older than most Airstreams. So the level of oxidation on the exterior is more than most, being a 1947. I don't think it was ever maintained since it was made.
In my opinion the wetordry sandpaper should remove or at least be highly effective against the internal corrosion pictured. Then as Aerowood and others are suggesting a good primer should put a hold on further corrosion.

Please post pictures of the heavy external oxidation on your '47 and your progress dealing with it on the http://www.airforums.com/forums/f441...ion-42083.html thread! That's a lot of years of oxidation! We've been looking for the worst possible (and longest developing!) examples of corrosion and oxidation. As well as for the solutions!
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Old 06-10-2008, 10:29 AM   #10
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Todd, I am beginning to think your trailer was parked on the same beach as mine. Of course only longer.
Chris, it's funny but we're patting ourselves on the back for having the worst corrosion and oxidation on the forum! Cuyeda please join us! And anyone else with heavy oxidation/corrosion troubles!
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Old 06-10-2008, 12:27 PM   #11
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Thank you all for your input with regards to the interior corrosion. I have ordered a green zinc chromate primer from iboats.com. With that plan, and waiting for the primer to arrive, I will continue to cut in the plywood new floors.

As for the exterior heavy oxidation, I already shot a few close up pictures for posting. ha ha. I will post later to the other thread.
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Old 06-11-2008, 08:32 AM   #12
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That is likely due to liquid mice nice. I power washed it with a detergent, raised, treated with chlorine solution, power washed again. Common wisdom is that it is self limiting, unlike iron rust. I could have primed it with a aluminum primer but it was for me an unneccary expense.

Are you removing the shell to do the floor?
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Old 06-12-2008, 01:55 AM   #13
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That is likely due to liquid mice nice. I power washed it with a detergent, raised, treated with chlorine solution, power washed again. Common wisdom is that it is self limiting, unlike iron rust. I could have primed it with a aluminum primer but it was for me an unneccary expense.

Are you removing the shell to do the floor?
I have not planned to remove the shell, but do have it gutted to the frame. Yes, there was a lot of rodent urine soaked in the wood, and removed everything wood. I titled this thread "Aluminum Corrosion", but what do I know. Luckily, there are only a few areas that have that white powder on it. I already ordered the primer, so either way, it should not be to much effort to continue as planned. Better safe than sorry.

See photos of the whole trailer, work in progress here.
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Old 09-17-2008, 07:10 PM   #14
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My New airstream has the dreaded corrosion

Hi there all,
I'm really depressed right now after giving my 17Ft Safari Sport Airstream a wash and noticing that the dreaded Filiform corrosion has started .I see it around the lights on the side (top and bottom) Based on seeing the pics that other Airstreamers have posted, I am concerned that it is the same type of corrosion that other Airstreamers are struggling with.
My AS is only 10 months old!! Not sure what I should do. Does the warrenty cover this type of thing? There is a great place not far from where I live (CG trailer works I think) who specialise in Airstream repair and I think they might be able to help perhaps.
Any other advice? I've read most of the posts here but what I have is just starting and I'm hoping to get on top of it before it get's worse.
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