What is in Coca-Cola that makes it dissolve steak and nails?

Coke, contrary to popular myth, doesn't dissolve steak or nails. Check out www.snopes.com and search "Coke" to find out more. There's nothing in Coke stronger than any other soda, which is basically carbonated water, caffeine and sugar or Aspartame. Phosphoric acid; but the water and sugar dilutes it enough to not be corrosive. There's an old mechanic's trick involving coke. If you've got an engine that's rusted solid, you can put it in coke and the phosphoric acid will dissolve enough of the rust to let you get it apart.