Zinc was the first metal used for cathodic protection, but the impure and variable qualities of zinc then available gave inconsistent results. Sometimes dense adherent layers of corrosion product formed on the zinc surface, blocking the current, stopping the protective action and so allowing corrosion of the iron to continue. Our Extreme Pure Zinc is readily available to overcome these problems.
Type: Type I – Marine Alloy Type II Special High Grade
Aluminum (%) 0.10-0.5 0.005 max 0.002 max
Cadmium (%) 0.025-0.07 0.003 max 0.003 max
Iron (%) 0.005 max 0.0014 max 0.003 max
Lead (%) 0.006 max 0.003 max 0.003 max
Copper (%) 0.005 max 0.002 max 0.002 max
Tin (%) --- --- 0.001 max
Others (%) 0.1 max --- ---
Zinc (%) Balance Balance Balance
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