A one-dimensional time-dependent model for studying oxide film growth on metallic surfaces

Journal Article · Thu Jun 28 00:00:00 EDT 2018 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.5024211· OSTI ID:1566377

Samin, Adib J.  ^[1]; Taylor, Christopher D. ^[2]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2. The Ohio State Univ., Columbus, OH (United States)

Corrosion resistance of industrial metals and alloys is largely imparted by the formation of a stable oxide film on the surface that kinetically limits the process of corrosion. Developing a fundamental knowledge of the processes involved in the oxide layer formation and growth is thus important for designing corrosion-resistant alloys. In this work, a model for oxide growth tracking two species (the oxygen and metal vacancies) was presented. The model accounted for species transport and interfacial chemistry. The potential profile was obtained by solving the Poisson equation without needing to invoke the typical linear assumption. Moreover, the fully time-dependent concentration and potential profiles were obtained and the oxide thickness was allowed to evolve by allowing the movement of the domain boundaries at either end. The results were analyzed and the effects of different parameters on the model were discussed.

• Research Organization: Energy Frontier Research Centers (EFRC) (United States). Center for Performance and Design of Nuclear Waste Forms and Containers (WastePD); The Ohio State Univ., Columbus, OH (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0016584; Award # DE-SC0016584
• OSTI ID: 1566377
• Alternate ID(s): OSTI ID: 1457090
• Journal Information: Journal of Applied Physics, Vol. 123, Issue 24; ISSN 0021-8979
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
nuclear
defects
corrosion