An XPS characterization of FeCO3 films from CO2 corrosion

J. K. Heuer, J. F. Stubbins

Research output: Contribution to journalArticlepeer-review

Abstract

The objective of this study was to systematically characterize iron carbonate (FeCO3) using X-ray photoelectron spectroscopy (XPS) to aid in the identification of potentially passive films on specimens exposed to carbon dioxide (CO2) corrosion. To achieve this, an FeCO3 precipitate was prepared in a chemical reactor under anaerobic conditions and Ostwald ripened for 48 hours at 75°C. Its characteristic binding energies were determined, and its decomposition and oxidation behavior were studied. The examination revealed that FeCO3 is stable in the ripened form and does not alter its structure with extended exposure to dry air. In the unripened form, however, FeCO3 is unstable and quickly decomposes into Fe2O3 in air. These results are applied to the XPS analysis of films on actual specimens exposed to CO2 corrosion in an experimental flow loop.

Original languageEnglish (US)
Pages (from-to)1231-1243
Number of pages13
JournalCorrosion Science
Volume41
Issue number7
DOIs
StatePublished - Jul 1 1999

Keywords

  • Iron carbonate
  • Mild steel (A)
  • Oxidation (C)
  • Passive films (C)
  • XPS (B)

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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