metal + -ize
metallize (third-person singular simple present metallizes, present participle metallizing, simple past and past participle metallized)
- To coat, treat or impregnate a non-metallic object with metal.
1879, Th Du Moncel, The Telephone, the Microphone and the Phonograph, Harper, page 166:
He takes the prepared charcoal used by artists, brings it to a white heat, and suddenly plunges it in a bath of mercury, of which the globules instantly penetrate the pores of charcoal, and may be said to metallize it.