ZINC - IRON (Zn-Fe) Zinc – Iron is a zinc alloy coating that provides enhanced corrosion protection as well as superior lubricity, ductility and hardness.  Used with a trivalent chromate coating, this treatment meets the automotive requirements for no hexavalent chromium (e.g. GMW 3044).  Used with black chromate coating, the zinc-iron alloy plating system provides 500-1,000 hours of salt spray protection.   Zinc - Iron is not suitable for parts exposed to 250˚F +. Advantages ü      Improved corrosion protection versus zinc ü      Even deposit distribution ü      Consistent color finish ü Highly cost effective compared to other zinc alloy coatings