Agenda Discussion: Oxidation of Metals, Solid-Solid Reactions, Solid-State Electrochemistry

Abstract

In the oxidation of pure metals at sufficiently high temperatures, Rapp asserted that for at least four metals (copper, cobalt, iron, and nickel), the classical diffusional mechanism is substantiated, i.e., the calculated values of Wagner′s parabolic rational rate constants correspond exactly to the experimental parabolic rate constants. However, the scales of these four metals are of no real practical importance, and the oxidation mechanisms of the important protective scales Cr₂ O₃, SiO₂ and Al₂O₃ are not well understood.