testo=Zamak
The alloy Zamak is a trademark which covers a family of alloys with zinc as base metal and alloying elements of aluminium, magnesium and copper. The second alloying element is aluminium and its main effect being a hardening agent whereas copper increases the castability. Iron and nickel are also present and are the main  reason for intergranular corrosion of these alloys. The most common zamak alloy is zamak 3, mainly used for die-casting.