Studies of the chemical and physical nature of passive oxide films formed on metals and alloys is a central subject of corrosion research. Passive oxide layers, typically 2-5 nm in thickness, protect many metals and alloys from an aggressive influence of the corrosion environment. Most of present knowledge on the chemical composition of passive films comes from ex-situ surface analytical methods. In particular AES (Auger Electron Spectroscopy) technique provide fundamental information on the chemical composition and state of components of thin surface layers, and particularly on surface atoms. AES is closely related technique which involve the energy of electrons emitted from small depth (several atomic layers) at the surface of a material. These fundamental information ensured the usefulness of AES for practical surface analysis. The composition surface layers is often quite different from that of the bulk material due to contamination, oxidation, or technological processing. This method give an insight into important problem concerning nature of passive films / oxide layer. Notable they provide an answer to the following question:
a) Which elements are present at the surface?
b) What is chemical state of these elements?
c) How much of each chemical state of each element is present?
d) What is the spatial distribution of the materials in three dimensions?
d) Is material present as a thin film at the surface?
- how thick is the film?
- how uniforms is its thickness?
- how uniform is the chemical composition of the film?
Many interesting information about structure and chemical composition of passive films / oxide layer can be obtained using combination of ion sputtering with AES method. Depth profiling is usually accomplished by inert gas (Ar+) ion bombardment to remove successive layers of materials from the surface. AES composition profiles are particularly useful since they can be acquired fast and with high depth resolution. Sputter profiling, however, damages the sputtered oxide films and can lead to composition changes by preferential sputtering and/or ion mixing.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/8704 must be provided.

1. Growth of SiC by PVT method with different sources of the cerium impurity, CeO₂ or CeSi₂
2. TiO₂ nanotubes based composite layers for biomedical applications
3. Microscopic and surface analytical characterization of TiO₂ nanotubes produced by anodic oxidation and thermal treatment 
4. Morphological and surface analytical characterization of chemically pretreated Ti surfaces intended for biomedical applications
5. Selective hydrogenation of isophorone in the presence of catalysts containing nanostructured metals
6. Characterization of the effects of hydrostatic extrusion on structure and surface properties of 303 austenitic stainless steel
7. The Effect of Hydrostatic Extrusion on the Corrosion Stability of Austenitic Stainless Steels
8. The Effect of Hydrostatic Extrusion on Resistance of 316 Austenitic Stainless Steel to Pit Nucleation
9. Corrosion resistance of nanostructured titanium
10. Microstructural and Auger Microanalytical Characterization of Cu-Hf and Cu-Ti Catalysts
11. Morphology and chemical characterization of Ti surfaces modified for biomedical applications
12. Effect of cathodic hydrogen charging on catalytic activity of Cu-Hf amorphous alloys