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Old 09-01-2013, 03:54 PM   #11
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Good point ejay,
For the under frame, I use truck bed lining. If it gets any surface rust developing under it, it pops off and you know to hit it with Rust stop and re-coat with bed liner.
The bed liner is pretty resistant to the elements, but doesn't stay sticky like tar undercoating.



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Old 09-02-2013, 06:25 PM   #12
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Crabman may comment on this......Outboard motors that are used in a salt water environment have a block of zinc bolted to them to act as a sacrificial anode. Rusting is a reduction process where the metal loses electrons. The zinc block gets 'reduced' instead of the motor, hence the term sacrificial anode. The electronic rust protection boxes provide the sacrificial electrons thru electricity of the battery. I've toyed with the idea of adding one of these two methods to my trailer frame. Incidentally, the anode used in some types of water heater tanks is the same principle.

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