Gözfejlesztö höátadó csövek korróziós állapotfelmérése II. A csöfelületek kémiai összetétele és struktúrája

Translated title of the contribution: Corrosion investigation of the heat exchangers in the Hungarian nuclear power plant. Part II. Chemical composition and structure of tube surfaces

Zoltán Homonnay, Ernö Kuzmann, Sándor Stichleutner, Kristófné Éva Makó, Kálmán Varga, Zoltán Németh, Andrea Szabó, Krisztián Radó, Péter Tilky, János Schunk, Gábor Patek

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Within the frame of a project dealing with the comprehensive study of the corrosion state of the steam generators the surface properties (chemical and phase compositions) of the heat exchanger tubes supplied by the power plant were studied by X-ray Diffraction (XRD) and Mössbauer Spectroscopy (CEMS) methods. Comparative analysis of chemical structure on the outer and inner surfaces has revealed that the main constituents of the protective oxide layer are magnetite, hematite as well as amorphous Fe(OH)3. The relative amount of these constituents is decisively related to the corrosion state. In the case of those samples which have undergone γ → α phase transition, no adequate relationship between the presence (and extent) of the phase transition and the corrosion state could be established.

Original languageHungarian
Pages (from-to)77-84
Number of pages8
JournalKorrozios Figyelo
Volume43
Issue number3
Publication statusPublished - Jan 1 2003

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Surfaces, Coatings and Films
  • Materials Chemistry

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