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Old 11-19-2007, 09:04 AM   #1
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2007 25' Safari SS SE
Alton , Illinois
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Filiform corrosion

I have been reading about this corrosion on a thread. I understand it exists but what is it exactly. Is this a surface cosmetic issue only or will it lead to structural problems?
The "Ann Rutledge"
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Old 11-19-2007, 10:21 AM   #2
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hi brad

here is a short definition of filiform or wormtrack corrosion, note it is spelled with one el...

Filiform Corrosion

here is a link to the article mshwarz provided in the other thread (post 35)

JCSE Volume 2 Paper 36

and a large searchable site on corrosion, including filiform... - The One-Stop Materials and Corrosion Information Resource

in most situations (ours) it is a cosmetic issue...

all of the true things that i am about to tell you are shameless lies. l.b.j.

we are here on earth to fart around. don't let anybody tell you any different. k.v.
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Old 11-19-2007, 12:38 PM   #3
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2002 19' Bambi
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2air has provided very good information. I would like to emphasize that the coating that filiform corrosion burrows under can be pigmented paint. In such a case, the corrosion is usually not noticable unless it is very extensive. Our Airstreams make such corrosion apparent because of the clearcoat. Not only is the corrosion visible, but its contrast with the surrounding non-corroded aluminum is very obvious.

The corrosion on non-coated aluminum parts is almost never if not never filiform.
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Old 11-19-2007, 12:55 PM   #4
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1985 25' Sovereign
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We have plenty of this, but our clearcoat is trashed anyway. We plan on polishing our AS and hope this will help.

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Old 11-19-2007, 01:17 PM   #5
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At first it is just an annoyance, but left alone for a long enough time can cause structural problems
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