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dc.contributor.authorMACAK Janen_GB
dc.contributor.authorNOVOTNY Radeken_GB
dc.contributor.authorSAJDL Petren_GB
dc.contributor.authorRENCIUKOVA Veronikaen_GB
dc.contributor.authorVRTILKOVA Veraen_GB
dc.identifier.citation15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors p. 228-230en_GB
dc.description.abstractCorrosion properties of Zr-Sn and Zr-Nb zirconium alloys were studied under simulated PWR conditions at temperatures up to 340 oC and 15MPa using in-situe electrochemical impedance spectroscopy and polarization measurements. EIS spectra were obtained in a wide range of frequencies. It enabled to gain information of both dielectric properties of oxide layers developing on the Zr-alloys surface and of the kinetics of the corrosion process and the associated charge and mass transfer phenomena. Experiments were run for more than 380 days, thus the study of all the corrosion stages was possible. Experimental impedance spectra were approximated by equivalent circuits based models. Jonscher-type analysis was applied to estimate frequency independent oxide capacitance. A model based on integrated Stern-Geary equation was developed to correlate instant and integral corrosion rates of zirconium alloys.en_GB
dc.description.sponsorshipJRC.F.4-Nuclear Reactor Integrity Assessment and Knowledge Managementen_GB
dc.publisherThe Minerals, Metals & Materials Society (TMS)en_GB
dc.titleElectrochemical Study of Pre- and Post-Transition Corrosion of Zr Alloys in PWR Coolanten_GB
dc.typeArticles in periodicals and booksen_GB
JRC Directorate:Energy, Transport and Climate

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