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Old 10-14-2021, 11:41 AM
backcountry backcountry is offline
Join Date: Dec 2015
Location: Houston, Texas
Posts: 71
Default Maingear legs corrosion

Maingear legs corrosion
Corrosion has attacked my gear legs started from the forward leading edge.
What is the material and what is the best way to attack the problem?
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Old 10-14-2021, 12:27 PM
n74846 n74846 is offline
Join Date: Sep 2015
Location: Boca Raton, FL BCT
Posts: 140

The gear legs are aluminum. It has been a chronic problem for me in Florida. I use a scotch-brite wheel on a dremmel to clean the surface. I have had success with POR-15 coating. The kit comes with a cleaner and prep solution. I also use the tube of POR-15 and wipe the area with alcohol prior to application.
Steve at LNA now after BCT tripled rent!
Flying a built ELSA
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Old 10-15-2021, 10:52 PM
RFSchaller RFSchaller is offline
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 3,165

Arenít your gear legs painted? Granted I live in AZ where corrosion is not an issue, but I would think paint would protect the legs.
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Old 11-04-2021, 01:34 PM
backcountry backcountry is offline
Join Date: Dec 2015
Location: Houston, Texas
Posts: 71

Yes the gear legs are painted. We are in the Houston area and Iím not the only one with the problem.
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Old 11-04-2021, 02:26 PM
N8DAV8R N8DAV8R is offline
Join Date: Apr 2007
Location: Salida, Ca
Posts: 101

A litte related to this, the KAI calls for applying grease to the unprotected areas of the gear legs to prevent corrosion.

Anyone have thoughts on using a product like Corrosion X in that application in lieu of grease?
Nate - Salida, Ca
RV-12is - Finish Kit!
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Old 11-25-2021, 11:57 AM
Charlie12 Charlie12 is offline
Join Date: Oct 2014
Location: Port Orange FL
Posts: 53
Default gear leg corrosion

I didn't do a careful verification of my "facts" but what I think I have picked up over the last several years is that the gear legs are 7075 aluminum rather than the more common 2024. 7075 is stronger than 2024 but more susceptible to corrosion. I carefully cleaned, primed, and painted mine as I installed them 6 years ago. But every condition inspection has shown spots of corrosion that need to be cleaned off and repainted. It is a common problem and I don't think there is a thorough fix. I am resigned to just living with the aggravation. BTW, I am a retired aircraft structural design engineer and I did not give up easily.
RV-12 #120768, first flight Sept. 2016
344 hrs as of 8/27/2021
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