Calculations of parabolic reaction rate constants

Abstract

The oxidation kinetics of only a very limited number of pure metals or binary alloys can be described by the simplest parabolic law, Δm²=k_pt, Thus for a transient period of faster kinetics, the steady state parabolic law is given by (Δm−Δm_i)² = k_p(t−t_i) when the initial weight gain Δm_i does not contribute to steady state rate control. In such a case, a plot of the kinetics data as Δm vs t^1/2 is inherently superior to the Δm² vs t plot for an accurate determination of the steady state parabolic rate constant, as well as for the analysis of the transient, faster kinetics.