AVS 66th International Symposium & Exhibition
    Fundamental Aspects of Material Degradation Focus Topic Thursday Sessions
       Session DM+BI+SS-ThM

Invited Paper DM+BI+SS-ThM3
Key Issues for the Stability of Protective Surface Oxides

Thursday, October 24, 2019, 8:40 am, Room A212

Session: Material Stabilities and Technology for Degradation Protection
Presenter: Philippe Marcus, CNRS - Chimie ParisTech, France
Correspondent: Click to Email
This lecture will focus on a surface science approach of corrosion and protection of metals and alloys, with emphasis on the structure and growth of surface oxide layers, a central theme in corrosion science.

Understanding early stage oxidation of metal surfaces at atomic or nanometric scale is a key to a better design and an improved control of engineering metals.

The following topics will be addressed:

- Nanostructure of ultra-thin oxide layers (passive films) on metals,

- Early stage oxidation of stainless steels,

- Local electronic properties of passive films,

- Mechanisms of initiation of localized corrosion, with emphasis on the role of surface defects in localized attack leading to corrosion,

The data that will be presented are obtained by using in situScanning Tunneling Microscopy (STM), Scanning Tunneling Spectroscopy (STS), X-Ray Photoelectron Spectroscopy (XPS), Time-of-Flight Secondary Ions Mass Spectrometry (ToF-SIMS) combined with electrochemical techniques and DFT calculations.