3.3. Anode efficiency
The anode efficiency values of pure zinc and its alloy,
namely, Zn+0.01 wt.% Mg+0.01 wt.% Pb, in the electrolytes
A, B, C and D at two different anodic current densities
(90 and 25 mA/cm 2) are given in Table 6. It is seen that
pure zinc gives anode efficiency values of 99.4 and 99.7% at
a current density of 90 mA/cm 2, and 99.5 and 96% at a current
density of 25 mA/cm 2 in the electrolytes A and B, respectively.
Thus, zinc behaves identically in both the electrolytes.
It is also clear that the zinc electrode in the two media investigated
yields the same anode efficiency for anodie current densities of 25 to 90 mA/cm 2. Hence, pure zinc can be safely
used as an anode in these two electrolytes up to 90 mA/cm 2.