[lwcamp]

Originally Posted by David Latapie

I just read this: Fluoroantimonic acid. Quintillion times stronger than sulfuric. Holy frag.

So it tends to dissociate a quintillion times more easily than sulfuric. Big deal. In solution, sulfuric acid is almost 100% dissociated into H+ and sulfate anyway. If 1 part in 100,000 of the sulfuric acid is still in the form of H_2SO_4 and 99,999 parts in 100,000 is in the form of 2 H+ and SO_4--, then what difference does it make to the corrosiveness that the same concentration of fluoroantimonic acid would have 0.000000000000001 part in 100,000 left in its normal form while 99,999.999999999999999 parts in 100,000 have given up their protons. Note that the concentration of protons is very nearly the same in either case, both solutions would be of equivalent corrosiveness.

Now if you want really nasty stuff, look to the strong oxidizers, like concentrated hydrogen peroxide or perchloric acid. These can be far more reactive and corrosive than mere acids. (Perchloric acid, of course, is both a potent oxidizer and one of the strongest acids.)