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Old 03-26-2016, 08:34 PM   #66 (permalink)
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IIRC COT-TEN was developed for railroad hopper cars, where they couldn't keep paint on them. It sort of self-repairs as is wears.

Left alone to weather, it spalls large, thin flakes like de-laminating wafer-board.

I've looked around the web and came up empty.
What did you use for search terms? I think of cathodic protection, but that possibly relies on being immersed in water.

Edit: According to people who try this get sued by the FTC.

But aluminum is a suitable sacrificial anode. So I'm suspicious. Probably has to do with pulsed DC (DC bias imposed on AC) at some harmonic frequency.

Last edited by freebeard; 03-26-2016 at 08:49 PM..
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