Within the frame of a project dealing with the comprehensive study of the corrosion state of the steam generators of the Paks NPP, surface properties (chemical and phase compositions) of the heat exchanger tubes supplied by the power plant were studied. Comparative analysis of the chemical structure of the outside and inside surfaces of heat exchanger tubes reveals that the main constituents of the protective oxide layer are magnetite, hematite as well as amorphous Fe(OH)3. The relative amount of the above constituents is decisively related to the general corrosion state of the surfaces. From the investigation of the samples undergone γ → α phase transition, no adequate relationship between the presence (and extent) of the phase transition and the general corrosion state of the surfaces can be identified.
|Number of pages||6|
|Journal||Magyar Kemiai Folyoirat, Kemiai Kozlemenyek|
|Publication status||Published - Oct 1 2002|
ASJC Scopus subject areas