Electrochemical investigation of Fe- and Zr-based alloys in standard conditions and under gamma irradiation in contact with H2O2
Publicerad
Författare
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Radiation induced corrosion is a major problem for the longevity of nuclear power plants,
and the research into this field is hampered by the requirement to accurately simulate
reactor conditions in experiments. This study attempts to electrochemically investigate
the interaction between hydrogen peroxide (H2O2) and the alloys AISI 441 and Zircalloy-2
(Zry2), both under standard conditions and under γ irradiation.
The results from the linear scan voltammetry (LSV) indicate that the anodic oxidation
reaction between AISI 441 and H2O2 might be catalyzed by γ irradiation. Whereas the
cathodic reduction reaction may be inhibited by the radiation. With regards to Zry2 the
anodic LSV results show a possible surface area limitation on the reaction. The cathodic
experiments highlight the chemical inertness that the alloy is known for, though there
appears to be a inhibitory effect of γ radiation upon the evolution of hydrogen.
These findings highlight the greater sensitivity of AISI 441 to radioactive environments,
which may have implications for material selection in reactor design.
Beskrivning
Ämne/nyckelord
Gamma irradiation, Hydrogen peroxide, ISI 441, Zircalloy-2, Electrochemistry