The Collaborative International Dictionary of English v.0.48:

Corrode \Cor*rode"\ (k?r-r?d") v. t. [imp. & p. p. Corroded;
   p. pr. & vb. n. Corroding.] [L. corrodere, -rosum; cor +
   rodere to gnaw: cf. F. corroder. See Rodent.]
   [1913 Webster]
   1. To eat away by degrees; to wear away or diminish by
      gradually separating or destroying small particles of, as
      by action of a strong acid or a caustic alkali.
      [1913 Webster]

            Aqua fortis corroding copper . . . is wont to reduce
            it to a green-blue solution.          --Boyle.
      [1913 Webster]

   2. To consume; to wear away; to prey upon; to impair.
      [1913 Webster]

WordNet (r) 3.0 (2006):

corroding
    n 1: erosion by chemical action [syn: corrosion, corroding,
         erosion]