anodization


an·o·dize

A0320100 (ăn′ə-dīz′)tr.v. an·o·dized, an·o·diz·ing, an·o·diz·es To coat (a metallic surface) electrolytically with a protective or decorative oxide.
[anod(e) + -ize.]
an′o·di·za′tion (-dĭ-zā′shən) n.

anodization

(ˌænədaɪˈzeɪʃən) or

anodisation

n (Elements & Compounds) the action of electroplating a metal with an ornamental or protecting layer of oxide