Validation of a percolation model for passivation of Fe-Cr alloys. Two-dimensional computer simulations

Qian Song, R. C. Newman, R. A. Cottis, Karl Sieradzki

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

A percolation model of alloy passivity has been introduced in earlier publications following the successful application of a similar model to de-alloying. This model proposes that primary passivation e.g., of Fe-Cr, occurs by blocking of ledges on a ramified surface created by selective dissolution of iron. Two-dimensional computer simulations have been used to demonstrate the main atomistic features of a percolation model for alloy passivity. The simulations reproduce all the qualitative features of passivation in Fe-Cr alloys, including a critical alloy composition and a passivation potential which decreases with increasing Cr content. New features which would appear in three dimensions are discussed.

Original languageEnglish (US)
Pages (from-to)435-439
Number of pages5
JournalJournal of the Electrochemical Society
Volume137
Issue number2
StatePublished - Feb 1990
Externally publishedYes

Fingerprint

Passivation
passivity
computerized simulation
Computer simulation
ledges
Alloying
Dissolution
Iron
alloying
dissolving
iron
Chemical analysis
simulation

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Validation of a percolation model for passivation of Fe-Cr alloys. Two-dimensional computer simulations. / Song, Qian; Newman, R. C.; Cottis, R. A.; Sieradzki, Karl.

In: Journal of the Electrochemical Society, Vol. 137, No. 2, 02.1990, p. 435-439.

Research output: Contribution to journalArticle

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