Aerugo

• (n.) The rust of any metal, esp. of brass or copper; verdigris.
Found on http://thinkexist.com/dictionary/meaning/aerugo/

Aerugo

bright green rust which forms on bronze and other metals which contain copper after exposure to air or acid: The obsolete pigment Verdigris was made of this substance. See also Patina, Verdigris
Found on http://www.selectartusa.com/gloss.htm

aerugo

rust of any metal
Found on http://phrontistery.info/a.html
No exact match found