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  #1  
Old 01-04-2019, 09:37 AM
guidoism's Avatar
guidoism guidoism is offline
 
Join Date: Dec 2013
Location: Louisville, KY
Posts: 45
Default Is this corrosion?

These parts sat in my garage in California about 10 miles from the ocean for several years. Ugh. I'm far away from the ocean now but dang, I was hoping that I wouldn't need to prime. I'll probably be scotchbriting this and killing my alclad, yes?

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  #2  
Old 01-04-2019, 09:54 AM
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sglynn sglynn is offline
 
Join Date: Mar 2008
Location: Anacortes, WA
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Default corrosion

Looks like lite corrosion. I primed my RV-7A. On my Cherokee, I would clean off the corrosion with lite scotch brite and spray with LP3 Corrosion X.
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  #3  
Old 01-04-2019, 10:59 AM
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Join Date: Jan 2007
Location: Battleground
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Default

Surface oxidation, a type of very mild corrosion. It will clean right up and might even wipe off with a solvent and mild abrasive. It takes quite a bit of grunt to sand through the Alclad.
Nothing to worry about, but this is why the factory on QBís, and many builders use a wash primer. Just enough protection to keep this from happening.

It doesnít matter what your environment is, Alclad will eventually show signs of oxidation, it may take many, many years or it could happen in a few short weeks in a bad environment.
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