Correlation Between Fluctuations of Mass Flux and Hydrogen Concentration in Supersonic Mixing

2005 ◽  
Author(s):  
Takakage Arai ◽  
Kazuhide Mizobata ◽  
Ryojiro Minato ◽  
Nobuhiro Tanatsugu ◽  
Yuko Mori ◽  
...  
Keyword(s):  
Hydrogen Concentration ◽  
Mass Flux ◽  
Supersonic Mixing

Flow Boiling at Low Mass Flux

2002 ◽  
Author(s):  
M. E. D. Urso ◽  
V.V. Wadekar ◽  
Geoffrey F. Hewitt
Keyword(s):  
Mass Flux ◽  
Flow Boiling ◽  
Low Mass

Hydrogen concentration monitoring in subsoil air on tectonic faults on the territory adjacent to NPP

2016 ◽  
Vol 2016 (2) ◽  
pp. 163-171
Author(s):  
Georgij Konstantinovich Ignatenko ◽  
Pyotr Ivanovich Gremchenko ◽  
Yurij Mihajlovich Glushkov
Keyword(s):  
Hydrogen Concentration ◽  
Tectonic Faults

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.

Sign in / Sign up

Export Citation Format

Share Document