Study of corrosion protective layers on iron surfaces by x-ray photoelectron- and Mossbauer-spectroscopic methods

F. H. Karman, Cs Vertes, E. Kalman

Research output: Contribution to journalConference article

Abstract

The influence of inhibitor molecules (1-hydroxy-ethane-1,1-diphosphonic acid, (HEDP) sodium benzoate (NaBz) and NaNO2 on mild steel surface has been examined. Surface analytical methods (Mossbauer spectroscopy, and X-ray photoelectron spectroscopy) have been used to investigate the composition of the surface layer. Various Fe2+, Fe3+, and FeOOH compounds and metallic, state of Fe were identified in the surface layer in all cases. It was found that the ratio of metallic state of Fe to different oxygen containing iron compounds was increased by increasing HEDP concentrations. Very thin passive layer was detected in the presence of NaBz and NaNO2 on the surface film. It was also observed that the passive state of iron in sodium nitrite solution was destroyed by HEDP and NH3 was detected in the surface layer.

Original languageEnglish
Pages (from-to)357-364
Number of pages8
JournalMaterials Science Forum
Volume185-188
Publication statusPublished - Jan 1 1995
EventProceedings of the 7th International Symposium on Passivity Passivation of Metals and Semiconductors - Clausthal, Ger
Duration: Aug 21 1994Aug 26 1994

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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