corrode

corrode (http://definr.com/corrode)

     v 1: cause to deteriorate due to the action of water, air, or an
          acid; "The acid corroded the metal"; "The steady
          dripping of water rusted the metal stopper in the sink"
          [syn: eat, rust]
     2: become destroyed by water, air, or an etching chemical such
        as an acid; "The metal corroded"; "The pipes rusted" [syn:
         rust]