If an iron electrode is coupled by an external resistance with a platinum electrode, put in the same solution consisting of bromate and sulphuric acid, a pulsating conventional current goes through the external circuit from the platinum to the iron electrode. In this work we study these spontaneous current oscillations. The influence of the external resistance, the size and the distance between the two electrodes, temperature, stirring and of ultrasound application on oscillatory parameters as period, amplitude and profiles of oscillations have been examined. Results are explained with a Franck and FitzHugh model ascribing oscillations to a spontaneous alternance of corrosion and passivation states, and using the mixed potential theory.