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.
Similar content being viewed by others
References
R.J. Brigham, E.W. Tozer: Corrosion 30, 5 (1974)
K. Osazawa, N. Okato: Effect of Alloying Elements, Especially Nitrogen, on the Initiation of Pitting in Stainless Steel. In: Passivity and Its Breakdown on Iron and Iron Base Alloys, e.d. by R. Steahle, H. Okada (NACE, Houston 1976)
J.E. Truman et al.: Br. Corros. J. 12, 4 (1977)
W.H. Richardson, P. Guha: Br. Corros. J. 14, 3 (1979)
R. Bandy, D. Van Rooyen: Corrosion 39, 6 (1983)
R. Bandy, D. Van Rooyen: Corrosion 41, 4 (1985)
Y.C. Lu et al.: J. Electrochem. Soc. 130, 8 (1983)
S. Jin, A. Atrens: Appl. Phys. A 42, 149–165 (1987)
C.D. Wagner et al.: Handbook of X-ray Photoelectron Spectroscopy, ed. by G.E. Muilenberg (Perkin-Elmer, Eden Prairie 1978)
N.S. McIntyre: In Practical Surface Analysis, ed. by O. Briggs, N.P. Seah (Wiley, Chichester 1983)
C.D. Wagner: J. Electron Spectrosc. Relat. Phenom. 32, 99 (1983)
S. Hofmann: Surf. Interface Anal. 2, 148 (1980)
P. Bruesch et al.: Appl. Phys. A 38, 1 (1985)