Studies Regarding Corrosion Mechanisms in Zirconium Alloys

2011 ◽  
Vol 8 (9) ◽  
pp. 103246 ◽  
Author(s):  
M. Preuss ◽  
P. Frankel ◽  
S. Lozano-Perez ◽  
D. Hudson ◽  
E. Polatidis ◽  
...  
Keyword(s):  
Zirconium Alloys ◽  
Corrosion Mechanisms

Studies Regarding Corrosion Mechanisms in Zirconium Alloys

2011 ◽  
pp. 649-681 ◽  
Author(s):  
M. Preuss ◽  
P. Frankel ◽  
S. Lozano-Perez ◽  
D. Hudson ◽  
E. Polatidis ◽  
...  
Keyword(s):  
Zirconium Alloys ◽  
Corrosion Mechanisms

Studies Regarding Corrosion Mechanisms in Zirconium Alloys

2011 ◽  
pp. 649-681 ◽  
Author(s):  
M. Preuss ◽  
P. Frankel ◽  
S. Lozano-Perez ◽  
D. Hudson ◽  
E. Polatidis ◽  
...  
Keyword(s):  
Zirconium Alloys ◽  
Corrosion Mechanisms

Studies Regarding Corrosion Mechanisms in Zirconium Alloys

2011 ◽  
pp. 649-681 ◽  
Author(s):  
M. Preuss ◽  
P. Frankel ◽  
S. Lozano-Perez ◽  
D. Hudson ◽  
E. Polatidis ◽  
...  
Keyword(s):  
Zirconium Alloys ◽  
Corrosion Mechanisms

Control of hydrogen absorption by nickel films obtained upon magnetic spraying of zirconium alloy using the thermoEMF method

2020 ◽  
Vol 86 (8) ◽  
pp. 32-37
Author(s):  
V. V. Larionov ◽  
Xu Shupeng ◽  
V. N. Kudiyarov
Keyword(s):  
Magnetron Sputtering ◽  
Hydrogen Concentration ◽  
Hydrogen Absorption ◽  
Zirconium Alloy ◽  
Hydrogen Adsorption ◽  
Zirconium Alloys ◽  
Nickel Film ◽  
Protective Film ◽  
Nickel Films ◽  
Hydrogen Penetration

Nickel films formed on the surface of zirconium alloys are often used to protect materials against hydrogen penetration. Hydrogen adsorption on nickel is faster since the latter actively interacts with hydrogen, oxidizes and forms a protective film. The goal of the study is to develop a method providing control of hydrogen absorption by nickel films during vacuum-magnetron sputtering and hydrogenation via measuring thermoEMF. Zirconium alloy E110 was saturated from the gas phase with hydrogen at a temperature of 350°C and a pressure of 2 atm. A specialized Rainbow Spectrum unit was used for coating. It is shown that a nickel film present on the surface significantly affects the hydrogen penetration into the alloy. A coating with a thickness of more than 2 μm deposited by magnetron sputtering on the surface of a zirconium alloy with 1% Nb, almost completely protects the alloy against hydrogen penetration. The magnitude of thermoemf depends on the hydrogen concentration in the zirconium alloy and film thickness. An analysis of the hysteresis width of the thermoEMF temperature loop and a method for determining the effective activation energy of the conductivity of a hydrogenated material coated with a nickel film are presented. The results of the study can be used in assessing the hydrogen concentration and, hence, corrosion protection of the material.

Typical Zirconium Alloys Microstructures in Nuclear Components

2014 ◽  
Vol 51 (9) ◽  
pp. 656-674 ◽  
Author(s):  
A. V. Flores ◽  
A. G. Gomez ◽  
G. A. Juarez ◽  
N. Loureiro ◽  
R. I. Samper ◽  
...  
Keyword(s):  
Zirconium Alloys

Texture Evolution Under Fast Heating and Cooling Rates of Zirconium Alloys Studied In-Situ by Synchrotron X-Ray Diffraction

2020 ◽  
Author(s):  
Chi-Toan Nguyen ◽  
Alistair Garner ◽  
Javier Romero ◽  
Antoine Ambard ◽  
Michael Preuss ◽  
...  
Keyword(s):  
Texture Evolution ◽  
Zirconium Alloys ◽  
X Ray Diffraction ◽  
Fast Heating ◽  
Cooling Rates ◽  
X Ray ◽  
Heating And Cooling

Zirconium and zirconium alloys

2008 ◽  
Author(s):  
H. G. Spilker ◽  
Roman Bender
Keyword(s):  
Zirconium Alloys

scholarly journals Evidence of hydrogen trapping at second phase particles in zirconium alloys

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Christopher Jones ◽  
Vidur Tuli ◽  
Zaheen Shah ◽  
Mhairi Gass ◽  
Patrick A. Burr ◽  
...  
Keyword(s):  
Density Functional ◽  
Secondary Ion Mass Spectrometry ◽  
Zirconium Alloys ◽  
Nuclear Industry ◽  
Second Phase ◽  
Hydrogen Trapping ◽  
Functional Theory ◽  
Second Phase Particles ◽  
Hydrogen Isotope Ratios ◽  
Dft Modelling

AbstractZirconium alloys are used in safety–critical roles in the nuclear industry and their degradation due to ingress of hydrogen in service is a concern. In this work experimental evidence, supported by density functional theory modelling, shows that the α-Zr matrix surrounding second phase particles acts as a trapping site for hydrogen, which has not been previously reported in zirconium. This is unaccounted for in current models of hydrogen behaviour in Zr alloys and as such could impact development of these models. Zircaloy-2 and Zircaloy-4 samples were corroded at 350 °C in simulated pressurised water reactor coolant before being isotopically spiked with 2H2O in a second autoclave step. The distribution of 2H, Fe and Cr was characterised using nanoscale secondary ion mass spectrometry (NanoSIMS) and high-resolution energy dispersive X-ray spectroscopy. 2H− was found to be concentrated around second phase particles in the α-Zr lattice with peak hydrogen isotope ratios of 2H/1H = 0.018–0.082. DFT modelling confirms that the hydrogen thermodynamically favours sitting in the surrounding zirconium matrix rather than within the second phase particles. Knowledge of this trapping mechanism will inform the development of current understanding of zirconium alloy degradation through-life.

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