Chaos during the electrodissolution of iron

Experiments were carried out on the electrodissolution of iron from a disk electrode rotating at 900 rpm in 1 M H 2 SO 4 . Current was measured as a function of applied potential. Potentiostatic current oscillations, all of which were chaotic, occurred over a range of applied potential. The characteristics of these chaotic oscillations were studied with the aid of state space plots and Poincaré sections, and with the calculation of ν, the correlation dimension; the latter quantity varied smoothly between 2.4 and 6.0 throughout the range of applied potential studied. The attractor for which ν = 2.4 can be represented by a three‐dimensional state space plot.