The role of the metal/oxide interface in the growth of passive films in aqueous environments

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DOIResolve DOI: http://doi.org/10.1016/j.corsci.2004.03.004
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TypeArticle
Journal titleCorrosion Science
Volume47
Issue1
Pages247256; # of pages: 9
SubjectCation diffusion; Vacancy annihilation; Film growth; Anodic film
AbstractA mechanistic methodology has been developed to understand the role of the metal/scale interface in the growth of scales at high temperatures. Specifically, cation vacancies arriving at the metal/scale interface are annihilated by the climb of misfit and misorientation interfacial dislocations. If this mechanism is blocked, e.g. by the tangling of dislocations within the metal, then cation diffusion cannot continue to support the growth of an adherent oxide. To the extent that adherent, crystalline and epitaxial passive or anodic films formed in aqueous environments also grow by cation diffusion over vacancies, the same mechanisms must apply. The segregation of large reactive element cations to the metal/scale interface and their importance in enhancing scale adherence by blocking vacancy annihilation, also constitute concepts that might find relevance for passive films in aqueous solutions.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number52278
NPARC number16285555
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Record identifier7ee3b4b6-77da-49ca-9da9-440d2b5a1efb
Record created2010-10-27
Record modified2016-05-09
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