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Removing paint before new rivets

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recapen(at)earthlink.net
Guest

Posted: Mon Nov 28, 2022 11:49 am Post subject: Removing paint before new rivets

Question for the groups…

 

Is it necessary to remove paint from a skin that you are going to rivet into?

My line of thinking is that the paint could come out from under the rivet after the change – reducing (removing) the clamping action that the rivet had.

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Gary.A.Sobek

Joined: 09 Jan 2006
Posts: 217
Location: SoCAL USA

Posted: Mon Nov 28, 2022 12:58 pm Post subject: Removing paint before new rivets

It was reported that during WW II, Navy aircraft had zinc chromate primer applied to the skin before riveting to help with corrosion protection even though aircraft were not expected to last that long.  T-18 builders in the early '60's also did the same much  like Lycoming recommends a thin layer of primer under the hold down plates on the narrow deck / standard cylinder flange engines.  Lycoming does NOT want paint under the hold down plates as that creates lose stud torque over time.

  

 

  ME, I would remove paint before riveting but would be ok with a thin layer of primer under the rivet head.

   

 

    

  Gary A. Sobek 

 "My Sanity" RV-6 N157GS O-320 Hartzell,  

 3,500+ Flying Hours NC25, USA 

 

 

 

 

  From: owner-rv-list-server(at)matronics.com <owner-rv-list-server(at)matronics.com> on behalf of recapen(at)earthlink.net <recapen(at)earthlink.net>

 Sent: Monday, November 28, 2022 2:49 PM

 To: rv-list(at)matronics.com <rv-list(at)matronics.com>

 Subject: Removing paint before new rivets  

 

      

Question for the groups… 

  

Is it necessary to remove paint from a skin that you are going to rivet into? 

My line of thinking is that the paint could come out from under the rivet after the change – reducing (removing) the clamping action that the rivet had.

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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jmsj(at)roadrunner.com
Guest

Posted: Tue Nov 29, 2022 4:36 am Post subject: Removing paint before new rivets

I agree with Gary.  I'd probably go with a thin layer of primer, if that much.  I did use primer on all of my parts, when I built the RV-6A; and, I've not seen any signs of rivet movement from that.  By the time I started building a RV-7A for myself, I pretty much did away with using primer on everything.  I sold the -7A before I finished it and can't say if my changes made a difference.  The -6A is plenty old enough to have things show up, though.  It's been flying for almost 23 years.  

-----------------------------------------

From: recapen(at)earthlink.net

To: rv-list(at)matronics.com

Cc: 

Sent: Monday November 28 2022 2:53:35PM

Subject: Removing paint before new rivets

Question for the groupsâ€¦ 

Is it necessary to remove paint from a skin that you are going to rivet into? 

My line of thinking is that the paint could come out from under the rivet after the change â€“ reducing (removing) the clamping action that the rivet had.

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

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