Corrosion protection of zirconium surface based on Heusler alloy

0478343 - FZÚ 2018 RIV US eng J - Journal Article
Horáková, Kateřina - Cichoň, Stanislav - Lančok, Ján - Kratochvílová, Irena - Fekete, Ladislav - Sajdl, P. - Krausová, A. - Macák, J. - Cháb, Vladimír
Corrosion protection of zirconium surface based on Heusler alloy.
Pure and Applied Chemistry. Roč. 89, č. 4 (2017), s. 553-563. ISSN 0033-4545. E-ISSN 1365-3075
R&D Projects: GA MŠMT LO1409; GA ČR(CZ) GA16-03085S; GA ČR GJ17-19910Y; GA ČR(CZ) GA15-05095S
Institutional support: RVO:68378271 ; RVO:67985858
Keywords : electrochemistry * silicon * spectroscopy * SSC-2016 * surface chemistry * wate * zirconium
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impact factor: 5.294, year: 2017

Fe and Si films were tested as corrosion protection layers for Zr in nuclear industry applications. Corrosion experiments were carried out in autoclave conditions with in-situ Electrochemical Impedance spectroscopy. A clean Zr surface is characteristic with disposition to disorder and rough morphology demonstrated in facets, steps or terraces. Upon deposition of Fe and Si atoms in amounts in the order of single monolayers and subsequent annealing at 400 °C, the original (1 × 1) Zr surface structure rearranges into (2 √ 3 × 2 √ 3)R30°. Corrosion experiments show that a thicker Si overlayer successfully suppresses oxygen uptake of the underlying Zr material by forming a diffusion barrier. The barrier effect of the films was also confirmed for hydrogen.

Permanent Link: http://hdl.handle.net/11104/0274446