COOPERATIVE STOCHASTIC-BEHAVIOR IN LOCALIZED CORROSION .1. MODEL

A stochastic model for localized corrosion is investigated both analyt ically and numerically. A feature of the model is that each metastable pitting event can influence subsequent events, although the influence of an individual event decays with time. The model describes an abrup t, cooperative transition from metastable to stable pitting, both unde r constant. e.g., potentiostatic conditions, and under conditions corr esponding to an anodic scan. The model accounts for several commonly o bserved distributions In pitting parameters. Histograms for the induct ion times for transition to stable pitting and for stable pitting pote ntials are presented.