Zinc Ingots – Consistent Quality, High Purity, Industrial-Scale Supply Zinc (Zn) is a bluish-grey metal with a melting point around 420 °C and a standard electrode potential of roughly –0.76 V (Zn/Zn²⁺). Being more electronegative than iron, zinc is essential in cathodic corrosion protection (galvanizing). Thanks to its alloyability, chemical stability and castability, zinc is a cornerstone in construction, automotive, electrical & electronics, casting, chemicals, energy and defense.