Oxidation of Metals

, Volume 46, Issue 1–2, pp 129–145 | Cite as

High-temperature corrosion of iron in sulfur dioxide at low pressure

  • Jolanta Gilewicz-Wolter
Article

Abstract

The composition and morphology of scales formed on iron in sulfur dioxide at 3×103 Pa and 1073 K have been investigated by means of various X-ray techniques of analysis (XRD, EDAX, EPMA) and scanning electron microscopy (SEM). The transport phenomena have been studied using platinum markers and tracers. The scales were composed of a sulfide and oxide mixture and grew by outward diffusion of iron. There was also some inward transport of sulfur and oxygen which occurred through, the discontinuities of the scale. These oxidants, as well as those originating from the dissociation of the scale, take part in the formation of the inner scale layer in the metal-consumption zone. The initial stage of the process proceeds mainly by the reaction of iron with SO2 molecules.

Key Words

iron SO2 sulfidation-oxidation transport tracers autoradiographs 

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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • Jolanta Gilewicz-Wolter
    • 1
  1. 1.The Faculty of Physics and Nuclear TechniquesUniversity of Mining and MetallurgyKrakówPoland

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