Effect of iron purity on oxidation kinetics at 600 °C to 900 °C

Yongfu Zhu, Kouji Mimura, Hiroki Chujo, Sang Hwui Hong, Jae Won Lim, Minoru Isshiki, Qing Jiang

Research output: Contribution to journalArticle

Abstract

The effect of iron purity on oxidation kinetics was examined at 600 °C to 900 °C under oxygen pressure of 0.1 MPa using a commercial electrolytically purified iron (ET-Fe, 99.9 wt pct) and a solvent extraction and anion-exchange refined iron (AE-Fe, >99.999 wt pct). ET-Fe oxidizes slower than AE-Fe. Oxidation of AE-Fe follows the parabolic oxidation rate law, but a downward deviation from the parabolic relationship was observed for ET-Fe. Analysis shows that the difference between AE-Fe and ET-Fe is attributable to a concentrated impurity layer at the FeO/Fe interface and to dissolution of copper, silicon, nitrogen, and carbon dissolved in FeO for ET-Fe.

Original languageEnglish
Pages (from-to)791-793
Number of pages3
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume37
Issue number3
DOIs
Publication statusPublished - 2006 Mar

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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