Abstract
The kinetics and mechanism of corrosion of zinc in 1–10 M NaOH solutions are presented with the help of steady-state and transient measurements. Both current step and potential step methods were used for the transient measurements. The individual electrode reactions giving rise to the observed corrosion were studied in detail for transfer coefficients, reaction orders with respect to OH−, Na+, Zn(OH)42− ions, and the rate-determining steps identified. Using this information, equations relating icorr and Ecorr to solution parameters were derived and compared with the experimental dependence. The rate-determining step for the anodic reaction obtained from transient measurements differs from that obtained from the steady-state measurements.
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