Investigation of Passive Films on α2 and γ Titanium Aluminides by X-Ray Photoelectron Spectroscopy
Authors:
- 1 July 1999
- journal article
- Published by Association for Materials Protection and Performance (AMPP) in Corrosion
- Vol. 55 (7) , 635-643
Abstract
Passive films on α2 and γ titanium aluminide formed potentiostatically in sodium hydroxide (NaOH) and sulfuric acid (H2SO4) solutions were studied by x-ray photoelectron spectroscopy (XPS). In NaOH, potentiostatic experiments showed that titanium aluminides had very similar passive current densities to that of Ti. XPS sputter depth profile showed nearly no Al present in the outer layer of the passive films. In H2SO4, passive current densities increased for specimens with increasing Al content. XPS sputter depth profile showed that Al was enriched in outer layers of the passive films. These results indicated that the passive film dissolution rate increased with increasing amounts of Al in the passive film for titanium aluminides.Keywords
This publication has 12 references indexed in Scilit:
- A Study of the Structure and the Morphology of Oxide Films on Amorphous Al‐Fe‐Ce Alloys by XPS and SEMJournal of the Electrochemical Society, 1995
- The effect of temperature on the growth of anodic oxide film on titaniumCorrosion Science, 1995
- The surface characterization of titanium and titanium-nickel alloys in sulfuric acidCorrosion Science, 1993
- The Point Defect Model for the Passive StateJournal of the Electrochemical Society, 1992
- Steady‐State Passive Films: Interfacial Kinetic Effects and Diagnostic CriteriaJournal of the Electrochemical Society, 1992
- Multi-technique surface charaterization of oxide films on electropolished and anodically oxidized titaniumApplied Surface Science, 1990
- Theory of Steady‐State Passive FilmsJournal of the Electrochemical Society, 1990
- Instability of Anodic Oxide Films on TitaniumJournal of the Electrochemical Society, 1982
- Auger and X-ray photoelectron spectroscopic and electrochemical characterization of titanium thin film electrodesSurface Science, 1977
- High-Resolution X-Ray Photoemission Spectrum of the Valence Bands of GoldPhysical Review B, 1972