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Found a weird corrosion pattern under a seat rail on a 737 last week
It was during a C-check in Seattle. Looked like a tiny star shape, not the usual pitting. My lead said he'd only seen it once before, on a plane that flew coastal routes for years. We ended up replacing a 14-inch section of the rail. Has anyone else run into this specific pattern, maybe from salt air?
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johnson.jade7mo ago
Heard a mechanic on a podcast talk about salt air making weird shapes like that. Said it can act like a tiny battery in the metal.
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jackson.jenny7mo ago
That coastal salt air is no joke. It gets into every tiny crack and sits there. The podcast guy was right about the tiny battery thing, it's called galvanic corrosion. You see it a lot on old boats where two different metals meet. The salt water basically lets the metal eat itself from the inside out in these weird patterns.
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