metallide

[ met-l-ahyd ]
/ ˈmɛt lˌaɪd /

verb (used with object), met·al·lid·ed, met·al·lid·ing.

to provide (a metal or alloy) with a diffused coating of a metal or metalloid by electrolysis at high temperature in order to impart a particular surface property to the base metal.

Origin of metallide

1965–70; metall- + -ide; perhaps originally a noun, variant of metalloid