1993 Volume 42 Issue 9 Pages 564-568
The autonomous oscillation of the electrode potential of iron immersed in oxidative solution has been studied by many workers. In this paper, the mechanism of this phenomenon in phosphoric acid solutions containing hydrogen peroxide was analysed by appling the pulsed current to the oscillatory systems. The threshold potential required to activate the passive surface of iron was found. It was confirmed that this threshold potential was the same as the Flade potential.