Surfaces and Multilayers

Applied Physics A

, Volume 51, Issue 5, pp 411-418

First online:

ESCA studies of nitrogen-containing stainless steels

  • A. S. LimAffiliated withDepartment of Mining and Metallurgical Engineering, University of Queensland
  • , A. AtrensAffiliated withDepartment of Mining and Metallurgical Engineering, University of Queensland

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Abstract

ESCA examination of films formed on nitrogen-containing stainless steels after immersion in 0.1 M NaCl revealed that nitrogen was enriched in the outer 0.5 nm of the film at a concentration a few times higher than in the substrate. The N(1s) binding energy varied from 399.6–399.7 eV at the outermost surface of the film to 398.3–398.8 eV in the film at a depth of about 0.5 nm. This indicates a change in the chemical state of nitrogen upon exposure of the nitrogen-containing stainless steels to the solution, and furthermore, that the surface nitrogen enrichment could be of significance in the improved pitting resistance.

PACS

68.45.v 81.60.Bn