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Old 09-12-2013, 09:26 AM
BDFLYER BDFLYER is offline
 
Join Date: Aug 2013
Location: Maryland
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Question Aeroquip 666 Fittings + AN832 = Corrosion Risk?

Quick question for the experts amongst us:

I am moving from Aeroquip 303 with standard aluminum AN fittings to Areoquip 666 (mostly to address the 303 degradation risk when using MOGAS with up to 15% alcohol content, especially on the returns).

Unfortunately, 666 uses stainless (CRES) fittings, though mechanically compatible, I have some concerns on having the 666's AN stainless fittings connected to AN aluminum fittings.

Any sense from the crowd on if my perceived risks around possible corrosion is well founded?

Last edited by BDFLYER : 09-12-2013 at 09:27 AM. Reason: Correction of 333 to 303 on hose type
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  #2  
Old 09-12-2013, 10:03 AM
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rzbill rzbill is offline
 
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Where do you have aluminum fuel fittings forward of the firewall?
Mechanical fuel pump is steel. There are only a couple more. There is one train of thought that says to use steel only. I do. Change them out. Solves the aluminum/SS galling question and removes any issue with aluminum fittings forward of the firewall
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Old 09-12-2013, 11:44 AM
TS Flightlines TS Flightlines is offline
 
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We really prefer steel fittings FWF, although aluminum has been used for years.
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Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
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Old 09-28-2013, 05:40 PM
BDFLYER BDFLYER is offline
 
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So, the use here is not FWF. If we set aside the discussion on FWF or not, any thoughts on the core question?
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Old 09-29-2013, 07:57 AM
TS Flightlines TS Flightlines is offline
 
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Airframe guys might chime in, but we havent seen any issues, even in planes being 20 years old.
Tom
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Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
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  #6  
Old 09-29-2013, 11:54 AM
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rv6ejguy rv6ejguy is offline
 
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I'm not aware of any corrosion issues with anodized aluminum fittings and stainless or any other types. Anodized aluminum is pretty inert/ impervious to most aviation materials.
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  #7  
Old 10-01-2013, 07:52 PM
BDFLYER BDFLYER is offline
 
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Excellent! Thanks!
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