Zinc Anode vs. Aluminum Anode


 

Advantage

Disadvantage

 

Zinc Anode

 

 


Current efficiency can be as high as 98%

Uniform corrosion across the anode

Zinc anodes can be used in flammable environments, i.e. oil, gas or combustible content-filled tanks

Capacity of 738A-h/kg (335A-h/lb)

Driving voltage is at least 20% less than Aluminum Anode

Zinc Anode cost higher due to international demand

Not advisable to use in environment where temperature is higher than 55 degrees

 

Aluminum Anode

 


Capacity of 2500A-h/kg, higher protection current and 25% longer life spend

Driving Voltage of 0.32v, 25% more when compared to the same size Zinc Anode

Up to 30% of cost saving

Operation ready in environment where temperature more than 70 degrees

Current efficiency of the range between 93% - 95%

Not advisable be used in flammable environments, i.e. oil, gas or combustible content-filled tanks