corroding lead

from The Collaborative International Dictionary of English v.0.48

Corrode \Cor*rode"\, v. i.
   To have corrosive action; to be subject to corrosion.
   [1913 Webster]

   {Corroding lead}, lead sufficiently pure to be used in making
      white lead by a process of corroding.

   Syn: To canker; gnaw; rust; waste; wear away.
        [1913 Webster]