A numerical model to predict the kinetics of anisothermal oxidation of metals

Abstract

Anisothermal oxidation of metals often takes place during heating and cooling processes in industries. For example, the steel slabs in a reheating furnace always undergo oxidation at varying temperatures. The Markworth model has been used to describe the kinetics of anisothermal oxidation, but it becomes very complicated when temperature-time relationship is non-linear. A numerical model has been developed in the present work. This model has a clear physical meaning, and is more flexible and easier in treating non-linear temperature-time relationship than the Markworth model. The predictions from the present model are in good agreement with the experimental results and the prediction from Markworth's model.