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dfmoeller
Joined: 19 Jun 2006
Posts: 60
Location: Austin, TX
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 Posted: Mon Apr 21, 2008 4:45 pm Post subject: Primer Under Rivet Heads |
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At the risk of starting another thread on primers (which I don't intend to do), I have a question. Almost everybody primes the internal feying surfaces. It appears though that nobody is priming the external rivet lines before riveting. Is there a reason that the interfacial surfaces between the rivet head and the aluminum won't corrode? It would seem to me that a prime place to trap moisture would be under the rivet heads. Am I overlooking something?
Doug
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John Bolding
Joined: 23 May 2006
Posts: 281
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| Posted: Mon Apr 21, 2008 5:44 pm Post subject: Primer Under Rivet Heads |
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you're not overlooking anything, if you live in a high humidity, polluted
atmosphere, priming is a good thing. jb
| Quote: | It appears though that nobody is priming the external rivet lines
before riveting. Is there a reason that the interfacial surfaces between
the rivet head and the aluminum won't corrode? It would seem to me that a
prime place to trap moisture would be under the rivet heads. Am I
overlooking something?
Doug
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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Thruster87
Joined: 16 Apr 2008
Posts: 193
Location: Australia
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| Posted: Mon Apr 21, 2008 11:27 pm Post subject: Re: Primer Under Rivet Heads |
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Howdy, We restore vintage aircraft like the C47/DC3 and we use Duralac on the sheet/skin mating surfaces only,but there is usually enough that seems to gets under the rivet heads.These aircraft are over 60yrs old and they were only ever Zinc chromated at build time on the inner skins.AS a ongoing protection we use a remedial product [ACF-50 or Ardrox]to displace moisture and leave a protective film that prevents attacks from other abusive elements found in the atmosphere.
Cheers
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kmccune
Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA
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| Posted: Tue Apr 22, 2008 2:42 am Post subject: Re: Primer Under Rivet Heads |
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I like this idea, I have stripes on the skin that I have to polish out!
| Ron Lendon wrote: | | I dip the rivets in primer before pulling, then wipe off the excess. |
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_________________
“Always do what you are afraid to do.”
R.W. Emerson (1803-1882)
"Real freedom is the sustained act of being an individual." WW - 2009
"Life is a good deal...it's worth it" Feb 1969
Dorothy McCune |
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john.marzulli(at)gmail.co
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| Posted: Tue Apr 22, 2008 6:21 am Post subject: Primer Under Rivet Heads |
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I prime the external areas before riveting. This is probably overkill for most people, but my bird is going to end up on floats... in an area with brackish water,
Good luck!
DO NOT ARCHIVE.
On Mon, Apr 21, 2008 at 5:45 PM, dfmoeller <dfmoeller(at)austin.rr.com (dfmoeller(at)austin.rr.com)> wrote:
| Quote: | --> Zenith-List message posted by: "dfmoeller" <dfmoeller(at)austin.rr.com (dfmoeller(at)austin.rr.com)>
At the risk of starting another thread on primers (which I don't intend to do), I have a question. Almost everybody primes the internal feying surfaces. It appears though that nobody is priming the external rivet lines before riveting. Is there a reason that the interfacial surfaces between the rivet head and the aluminum won't corrode? It would seem to me that a prime place to trap moisture would be under the rivet heads. Am I overlooking something?
Doug
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=178311#178311
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--
John Marzulli
http://701Builder.blogspot.com/
http://www.GenevieveMarzulli.org/
"Flying a plane is no different than riding a bicycle... it's just a lot harder to put baseball cards in the spokes.
-Airplane The Movie [quote][b]
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