The polarization parameters for the corrosion of zinc and
its alloys in 10 M NaOH with 15 wt.% sodium citrate, 0.3
wt.% CaO and 0.02 M sodium stannate are listed in Table 5.
E~o~ values for all the systems are more negative than the
respective OCP values. In all the cases, the b~ values are less
than the ba values. This indicates that the overall kinetics of
corrosion in these cases are under anodic control.