Ken, Thanks for your comments on John Wright's Corrosion seminar. Wish I could have been there.
This past week I read an article ---maybe self serving ---from some corrosion treatment company, about the use of polyurethane paints being so moisture proof that the use of the paints on aluminum could trap moisture in aluminum and cause corrosion. Wow, I don't know if that is true or not; but sure makes one think twice about previous decisions to use Polyurathanes, etc.,... Maybe someone knowledgeabe on this issue could address this potential damaging effect..Are airplanes painted with polyurathanes being set up for major corrosion problems????? Is trapping moisture under paint more damaging than leaving the aluminun unpainted - to form a natural protective oxidation layer??? I still have not AD/Swiss Cheesed- my coupe...so it is just sitting... More and more I tend toward removal of the fabric and complete inspection - on what I originally thought was way overkill on a very limited problem. I'm curious about the corrosion problems on other similar aged aluminum parts ---other aircraft...I find it hard to believe that the aluminum manufacturing problem would be limited to ercoupe parts. Regards, Harry Francis 93530 Blacksburg, VA
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