Exactly my thought.
I wonder if you couldn't get a polybed, or CRES option for salt trucks?
I'm sure DOT around here used to install anodes and electric rust preventers on their fleet.
Now they are using mostly magnesium brine because it doesn't get flung against cars, causing scratches.
Shaun, it's all the oxidative effect of chlorine.
Sodium chloride up here, sodium hypochlorite down there.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.