Chemical and Phase Composition of Nanosized Oxide and Passive Films on Niframe0Cr Alloys. II. XPS An |
10.04.2009 г. |
Chemical and Phase Composition of Nanosized Oxide and Passive Films on NiCr Alloys. II. XPS Analysis of Films Produced by Anodic Passivation of Alloys in 1 N H2SO4 Yu. Ya. Andreev, E. A. Skryleva, and I. A. Safonov Moscow State Institute of Steel and Alloys, Leninskii pr. 4, Moscow, 119991 Russia E-mail:
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Received July 18, 2008 Abstract — XPS data of thin (1 to 2 nm) oxide films formed by the anodic passivation of Ni–2 at % Cr and Ni6at % Cr alloys in 1 N H2SO4 are discussed. Thermodynamic calculations of the solid-phase chemical reaction 3NiO + 2Cr = Cr2O3 + 3Ni are carried out taking into account the changes in the surface energy at the alloyoxide film interface along with the Gibbs energy change in the alloy oxidation reaction. PACS numbers: 81.07.-b DOI: 10.1134/S2070205109020099
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