On the fate of hydrogen during zirconium oxidation by water: Effect of oxygen dissolution in α-Zr
Journal article, 2014

Zirconium oxidation by water is accompanied by hydrogen conversion, either H2 is released or hydrogen is picked up by the alloy. Strategies are sought to mitigate the detrimental hydrogen uptake into the metal. The corrosion phenomenon is subdivided into anode and cathode processes caused by electron release upon O2- oxidation at the metal/oxide interface in case of the former and electron-proton recombination resulting in hydrogen pick-up or H2 evolution in case of the latter. In a previous study, the additive dependence of the cathodic hydrogen evolution reaction was analysed. The present study contributes the oxygen concentration dependence of the anode potential, presents the impact of oxygen concentration on the co-absorption of hydrogen and merges the anode and cathode processes. The computational model is validated by semi-quantitatively reproducing the experimental solubility limit for oxygen in α-Zr. The impact of the emerging conceptual understanding for material development is discussed.

density functional theory

water induced

zirconium

corrosion

cladding

hydrogen evolution reaction

modeling

solubility limit

anode process

oxygen solubility

hydrogen co-absorption

ZrO2 dissolution

hydrogen pick-up

Author

Mikaela Lindgren

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Itai Panas

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

RSC Advances

2046-2069 (ISSN)

Vol. 4 22 11050-11058

Driving Forces

Sustainable development

Areas of Advance

Energy

Materials Science

Subject Categories

Chemical Process Engineering

Materials Chemistry

Theoretical Chemistry

Nano Technology

Corrosion Engineering

Condensed Matter Physics

DOI

10.1039/c4ra00020j

More information

Created

10/7/2017