Zinc vs aluminium anodes

Aluminium anodes are generally more efficient and economical than zinc anodes.

Better current distribution

The driving voltage of aluminium anodes is higher than of zinc, resulting in better protective current distribution of aluminium anodes.

Less weight

The capacity of aluminium (2,650 Ah/kg) is about 3.5 times higher than zinc (780 Ah/kg). Hence, the total required anode weight by use of aluminium is far less then for zinc anodes.

More rational

Using aluminium anodes involves considerably lower material cost compared to zinc anodes.