Results 261 to 270 of about 42,310 (300)

Hydrogen Permeation of Alloy 22

CORROSION 2008, 2008
Abstract The effect of hydrogen permeation on the corrosion performance of Alloy 22 was investigated. 50µm thick Alloy 22 membranes were permeated with Hydrogen under a cathodic charging current density of 1mA/cm2 in a Devanathan-Stachurski cell at 60°C in pH 12.5, 0.1M NaOH solution.
M. L. Taylor, L. G. McMillion
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Hydrogen permeation through graphite

Journal of Nuclear Materials, 1988
Abstract As a study of the transport processes of hydrogen in graphite, the kinetics of permeation of hydrogen and argon through graphite was investigated in the pressure range of 0.5 to 100 Pa and in the temperature range of 290 to 983 K. The observed results suggested that the hydrogen permeation through graphite can be dealt with as a simple ...
Tsukasa Kiyoshi, Takashi Namba, Michio Yamawaki   +2 more
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Permeation of hydrogen isotopes in nickel

The Journal of Physical Chemistry, 1978
Tritium permeabilities of nickel over the 500 to 1100 K range have been determined and compared to deuterium and protium permeabilities. Solubility data for the three isotopes have been calculated from these permeability data and literature data for diffusivities.
J. T. Bell, J. D. Redman
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Models for hydrogen permeation in metals

Journal of Applied Physics, 1992
Hydrogen transport in metals is affected by processes occurring in the bulk, the surface/bulk, and gas/surface interfaces. Several models have been proposed to explain the permeation process. Here the development of the various models is discussed and the similarities and differences among them are highlighted.
P. L. Andrew, A. A. Haasz
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Hydrogen permeation study with atomic hydrogen beam

Journal of Nuclear Materials, 1992
Hydrogen permeation through Mo and Ni using an atomic hydrogen beam is examined. Different from ion driven permeation (IDP), the hydrogen permeation rate does not show an appreciable spike, keeping the permeation rate at a constant and reproducible value.
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Permeation of hydrogen through metals

Philosophical Magazine, 1959
Abstract The theory of permeation of hydrogen through certain transition metals has been further developed. It has been shown that this theory, in which certain slow phase-boundary processes couple with diffusion to produce the permeation phenomena, can in rather simple ways predict the observed behaviour.
R. Ash, R. M. Barrer
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Hydrogen Permeation through Nickel

Japanese Journal of Applied Physics, 1984
The time dependence of the rates of permeation of hydrogen through annealed and as-rolled nickel foils was measured in the temperature ranges 120–430°C and 80–200°C, respectively. Annealed specimens exhibited permeabilities, diffusivities and solubilities that were in fairly good agreement with previous results, while the permeation characteristics of ...
Yoshio Furuya, Eiji Hashimoto, Takao Kino   +2 more
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Hydrogen permeation and diffusion in molybdenum

Journal of Nuclear Materials, 1992
In order to determine both coefficients of diffusion and permeation of hydrogen in Mo correctly, a precise hydrogen permeation measurement has been carried out at temperatures ranging from 500 to 1100 K using pure H2 (less than 1 ppm H2O) with an upstream hydrogen pressure of 1 to 105 Pa. The determined diffusion (D) and permeation (Φ) coefficients are
T. Tanabe, Y. Yamanishi, S. Imoto
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Effect of trapping on hydrogen permeation

Metallurgical Transactions A, 1975
Approximate solutions were obtained to the nonlinear partial differential equations derived by A. McNabb and P. K. Foster for a general model of diffusion-plus-trapping. The finite-difference method was applied to their equations for boundary conditions appropriate to hydrogen permeation and evolution in a plane. Solutions are shown to be stable and to
George R. Caskey, William L. Pillinger
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Hydrogen permeation characteristics of La27Mo1.5W3.5O55.5

Journal of Membrane Science, 2014
Abstract Hydrogen permeation in 30% Mo-substituted lanthanum tungsten oxide membranes, La27Mo1.5W3.5O55.5 (LWMo), has been measured as a function of temperature, hydrogen partial pressure gradient, and water vapor pressure in the sweep gas. Transport of hydrogen by means of ambipolar proton–electron conductivity and – with wet sweep gas – water ...
Einar Vøllestad, Camilla K. Vigen, Anna Magrasó, Reidar Haugsrud   +3 more
openaire   +1 more source