Kémiai dekontamináció hatása a gozfejleszto hoátadó csövek korróziós állapotára

Translated title of the contribution: Effects of a chemical decontamination procedure on the corrosion state of the heat exchanger tubes of steam generators

Szabo Andrea, Mátyás Aurél, Varga Kálmán, Radó Krisztián, Németh Zoltán, Oravetz Dezsö, Kristófné Makó Éva, Homonnay Zoltán, Kuzmann Erno, Schunk János, Tilky Péter, Oszvald Ferenc, Patek Gábor

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In the present work, a comprehensive study of the corrosion state of the heat exchanger tubes originating from 17 different steam generators of Paks NPP (Hungary) was performed. While the passivity of the inner surface of 22 stainless steel specimens was investigated by voltammetry, the morphology, chemical and phase compositions of the oxide layer formed on the surface were analyzed by SEM-EDX, XRD and CEMS. Based on the measured corrosion characteristics (corrosion rate, thickness and chemical composition of the protective oxide-layer) it was found that these parameters strongly depend on the decontamination history of steam generators. APCITROX technology does exert a detrimental effect on the general corrosion state of steel surfaces and a "hybrid" structure of the amorphous and crystalline phases is formed in the outermost surface region. This "hybrid" structure of the surface constituents exhibits great mobility into the primary coolant under normal operation of the VVER type reactor.

Original languageHungarian
Pages (from-to)123-133
Number of pages11
JournalKorrozios Figyelo
Volume44
Issue number4
Publication statusPublished - Aug 17 2004

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ASJC Scopus subject areas

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

Cite this

Andrea, S., Aurél, M., Kálmán, V., Krisztián, R., Zoltán, N., Dezsö, O., Éva, K. M., Zoltán, H., Erno, K., János, S., Péter, T., Ferenc, O., & Gábor, P. (2004). Kémiai dekontamináció hatása a gozfejleszto hoátadó csövek korróziós állapotára. Korrozios Figyelo, 44(4), 123-133.