The Kinetics and Mechanism of Oxygen Uptake on a Polycrystalline Iron Surface
Interim rept. 1 Mar 1986-28 Feb 1988
RENSSELAER POLYTECHNIC INST TROY NY DEPT OF MATERIALS ENGINEERING
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The initial uptake of oxygen has been studied on a clean, polycrystalline iron surface over the temperature range between 360 and 575 K, using a combination of Auger electron spectroscopy and mass spectrometry. An initial chemisorption period is followed in turn by a temperature dependent linear oxidation regime and a final period of decreasing oxidation rate. Chemisorption kinetics can be explained by an intrinsic molecular precursor mechanism. The linear oxidation period involves uptake into the near-surface bulk by a non-activated place exchange mechanism.
- Inorganic Chemistry
- Metallurgy and Metallography