The Department of Defense's Corrosion Department

Random stuff like this interests me way more than it should.

The Pentagon itself spends something in the neighborhood of $23 billion per annum to combat the problem. "Weapon systems are routinely out of commission due to corrosion deficiencies," the DoD observes. "For example, corrosion has been identified as the reason for more than 50 percent of the maintenance needed on KC-135 aircraft."

So—get this—the Defense Department has an entire agency that does nothing but try to figure out ways to fight corrosive gunk.