Accession Number:

ADA196489

Title:

The Kinetics and Mechanism of Oxygen Uptake on a Polycrystalline Iron Surface

Descriptive Note:

Interim rept. 1 Mar 1986-28 Feb 1988

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY NY DEPT OF MATERIALS ENGINEERING

Personal Author(s):

Report Date:

1988-02-28

Pagination or Media Count:

43.0

Abstract:

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.

Subject Categories:

  • Inorganic Chemistry
  • Metallurgy and Metallography
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE