Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-06-2017, 12:24 PM   #15
1 Rivet Member
 
RobH41's Avatar
 
2001 25' Safari
Currently Looking...
Nashville , Tennessee
Join Date: Jun 2016
Posts: 16
When I did the factory tour at JC not long ago, I asked our tour guide what AL alloy was used in the AS pre-finished AL panels and to my surprise he did not know. I can offer my experience with our French-built all-aluminum 28' sailboat that is now over 30 years old (built in 1981) and sailed/kept in both fresh and salt water environments. The entire hull is not painted or coated with anything other than anti-fouling copper-free bottom paint below the water line and shows she no signs of any corrosion whatsoever. The alloy used was 5052 H-111 and that's what matters...the alloy used for the purpose intended and, of course, the life-cycle and cost/market considerations. There are many AL alloys available..."horses for courses". The correct AL alloy for the intended use and life cycle and cost parameters is right choice and there are many to choose from. If anybody does know what alloy (or alloys over the years) AS uses for the panels I'd love to add that to my knowledge about them!
__________________

__________________
2001 Safari 25 with custom install Eddie Bauer rear hatch door. TV is 2006 LBZ GMC 2500HD with Gale Banks Engineering engine package. 40 gallon Aux. diesel tank. Front maneuvering hitch. Rancho XL shocks. WBCCI 5173
RobH41 is offline   Reply With Quote
Old 11-07-2017, 12:52 AM   #16
3 Rivet Member
 
1973 31' Sovereign
1978 Argosy 30
1985 31' Excella
Sacramento , California
Join Date: Nov 2016
Posts: 123
[QUOTE=RobH41;2031274]When I did the factory tour at JC not long ago, I asked our tour guide what AL alloy was used in the AS pre-finished AL panels and to my surprise he did not know. I can offer my experience with our French-built all-aluminum 28' sailboat that is now over 30 years old (built in 1981) and sailed/kept in both fresh and salt water environments. The entire hull is not painted or coated with anything other than anti-fouling copper-free bottom paint below the water line and shows she no signs of any corrosion whatsoever. The alloy used was 5052 H-111 and that's what matters...the alloy used for the purpose intended and, of course, the life-cycle and cost/market considerations. There are many AL alloys available..."horses for courses". The correct AL alloy for the intended use and life cycle and cost parameters is right choice and there are many to choose from. If anybody does know what alloy (or alloys over the years) AS uses for the panels I'd love to add that to my knowledge about them![/QUOTE]


Last time I checked... it was 2024-t3...coated by alcoa to A/S specs...

5052 would be too soft.. and not have the strength that the 2024 has... but the 5052-H111 is almost pure alu...

where as the 2024-t3 is alclad...and has a mixture of metals in it... such as

Al 90.7 - 94.7
Cr Max 0.1
Cu 3.8 - 4.9
Fe Max 0.5

Component Wt. %
Mg 1.2 - 1.8
Mn 0.3 - 0.9
Other, each Max 0.05
Other, total Max 0.15

Component Wt. %
Si Max 0.5
Ti Max 0.15
Zn Max 0.2

Hope that is not too much info... but, now you know why A/S get corrosion and fillform at the joints...
__________________

__________________
GM Airstream is offline   Reply With Quote
Old 11-07-2017, 03:51 AM   #17
Rivet Master
 
2012 19' International
Southeastern MI , Michigan
Join Date: Aug 2016
Posts: 837
So if I spray the edges with FluidFilm and wipe down, will that help?
__________________
Countryboy59 is offline   Reply With Quote
Old 11-08-2017, 10:39 AM   #18
1 Rivet Member
 
RobH41's Avatar
 
2001 25' Safari
Currently Looking...
Nashville , Tennessee
Join Date: Jun 2016
Posts: 16
I found this info via a member that kindly shared this link with me. If this is current, it states it's a 3000 series factory clear-coated alloy currently:

https://www.airstream.com/wp-content...92c0a731f5.pdf

BTW 5000 series alloys are stronger and more corrosion resistant. In fact the 3000 series is the same used in beverage cans...LOL!

From Wikipedia: Most metal beverage cans manufactured in the United States are made of aluminum,[7] whereas in some parts of Europe and Asia approximately 55 percent are made of steel and 45 percent are aluminum alloy. Steel cans often have a top made of aluminum. The aluminium used in United States and Canada are alloys containing 92.5% to 97% aluminum, <5.5% magnesium, <1.6% manganese, <0.15% chromium and some trace amounts of iron, silicon and copper according to MSDS from aluminum producer Alcoa.[8] Alloys used include 3004, 3105, or other 3xxx/5xxx series aluminum.[9]

Aluminum 5052 If that also sounds like aluminum 5052 that is because both alloys obtain similar characteristics. However, the 5052 alloy has a higher strength and greater corrosion resistance (including to salt water). Its major alloying element is magnesium. Magnesium overcomes the corrosive effects of the iron present in the alloy. It also has better finishing characteristics than the 3003 alloy. These attributes make aluminum 5052 a great fit for food processing equipment and truck trailers as well as marine and aquatic features.
Because the difference isn’t always obvious with these two mill finish aluminum alloys, we have provided an infographic for easy reference.
If you have more questions about the difference in these two aluminum alloys contact your local sales representative. For more information on how aluminum is made read our blog post on the process: “Aluminum: How it is Made.”


https://www.ofrmetals.com/aluminum-a...3003-and-5052/
__________________

__________________
2001 Safari 25 with custom install Eddie Bauer rear hatch door. TV is 2006 LBZ GMC 2500HD with Gale Banks Engineering engine package. 40 gallon Aux. diesel tank. Front maneuvering hitch. Rancho XL shocks. WBCCI 5173
RobH41 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Marker lights and filiform corrosion silverbacksurfer Lights - Interior & Exterior 11 10-28-2017 02:37 PM
Bad shore power inlet and filiform corrosion ron7852 General Repair Forum 8 03-25-2016 02:45 PM
Nuclear Reactor Corrosion versus Airstream Filiform Ray Eklund Ribs, Skins & Rivets 0 06-08-2008 01:56 PM
Filiform Corrosion? Harper Ribs, Skins & Rivets 7 06-08-2008 11:45 AM
Filiform corrosion Brad Hunt Ribs, Skins & Rivets 4 11-19-2007 01:17 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:18 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.