Zinc Anodes Zinc anodes are used either for soil cathodic protection at low resistivities or in seawater applications. Zinc has a limited output capacity. Zinc Anodes Manufacturing Chemical Composition ComponentComposition (%, weight) Fe0.005 max. Cd0.025 ~ 0.07 Pb0.006 max. Cu0.005 max. Al0.1 ~ 0.5 ZnRemainder ASTM B418 Type I Properties PropertiesZinc anode Specific gravity7.14 Open Circuit Potential (V, Ag/Agcl) -1.05 Efficiency (%)95 Effective Current Capacity (A.hr/kg)780 ASTM B418 Type II chemical composition and properties ComponentComposition ( %, weight) Fe0.014 max Cd0.003 max Pb0.003 max Cu0.002 max Al0.005 max ZnRemainder
