Effect of Oxygen Content on the Oxidation of Pure Iron
The oxidation of pure iron with various oxygen contents was studied. Pure iron and ferrite containing different amounts of oxygen were oxidized for 1–5 hr in two types of oxidation atmospheres at 850°C. Pure iron (0.0037% oxygen) oxidized more rapidly than ferrite (0.017% oxygen). Oxidation is higher in the moist ambient atmosphere than in dry air. The oxidation rate was not proportional to the amount of oxygen in the samples.