Current developments of nanoscale insight into corrosion protection by passive oxide films

Preprint English OPEN
Maurice, Vincent ; Marcus, Philippe (2018)
  • Related identifiers: doi: 10.1016/j.cossms.2018.05.004
  • Subject: Surface analysis | Metallic materials | Corrosion | Physical chemistry | Condensed Matter - Materials Science | Passive films

Oxide passive films are a key for the durability of metals and alloys components as well as a central issue in corrosion science and engineering. Herein, we discuss current developments of the nanometer and sub-nanometer scale knowledge of the barrier properties and adsorption properties of passive oxide films brought by recent model experimental and theoretical investigations. The discussed aspects include (i) the chromium enrichment and its homogeneity at the nanoscale in passive films formed on Cr-bearing alloys such as stainless steel, (ii) the corrosion properties of grain boundaries in early intergranular corrosion before penetration and propagation in the grain boundary network, and (iii) the interaction of organic inhibitor molecules with incompletely passivated metallic surfaces. In all three cases, key issues are highlighted and future developments that we consider as most relevant are identified.
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