Book excerpt: Passivation of Metals and Semiconductors, and Properties of Thin Oxide Layers contains a selection of papers presented at PASSIVITY-9, the 9th International Symposium on the Passivation of Metals and Semiconductors and the Properties of Thin Oxide Layers, which was held in Paris, 27 June - 1 July, 2005. One hundred and twelve peer-reviewed manuscripts have been included. The book covers all the fundamental and applied aspects of passivity and provides a relevant and updated view of the advances and new trends in the field. It is structured in ten sections: • Growth, (Nano)structure and Composition of Passive Films • Passivity of Semiconductors • Electronic Properties of Passive Films • Passivity Issues in Biological Systems • Passivity in High-Temperature Water • Mechanical Properties of Passive Films,• Passivity Issues in Stress Corrosion Cracking and Tribocorrosion • Passivity Breakdown and Localized Corrosion • Modeling and Simulation • Surface Modifications and Inhibitors (for Improved Corrosion Resistance and/or Adhesion)