Hydrogen permeation through metals

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5322369

Huhn, D K

The permeation of hydrogen through metals was studied both theoretically and experimentally. Gas phase permeation experiments with nickel, iron, and iron-titanium alloys were done at low temperatures, 270 to 343 K, and high temperatures, 751 to 384 K, with hydrogen pressures ranging from 10/sup 3/ to 10/sup 5/ Pa. Experiments at low temperatures used an electrochemical cell to detect the permeating hydrogen, deuterium, or hydrogen-deuterium flux. At high temperatures a vacuum system equipped with a mass spectrometer measured the permeating hydrogen flux. The permeability and diffusivity of hydrogen through nickel membranes, 10/sup -4/ to 10/sup -5/ m in thickness, was measured in the temperature range of 580 to 270 K. The experimental results did not exhibit postulated surface effects; however, trapping of hydrogen was observed with a trap density of 2.5 x 10/sup 23/ sites/m/sup 3/ and a binding energy of 33 kJ/mole. The permeability of hydrogen through iron-titanium alloys increased with titanium concentration with a maximum increase of approximately 10% for a Fe-3.04 wt% Ti alloy compared to pure iron. High temperature diffusivity measurements showed a small decrease in diffusivity with titanium concentration; therefore, the solubility increased.

• Research Organization: Cornell Univ., Ithaca, NY (USA)
• OSTI ID: 5322369
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
DEUTERIUM
DIFFUSION
ELEMENTS
HIGH TEMPERATURE
HYDROGEN
HYDROGEN ISOTOPES
IRON
IRON ALLOYS
ISOTOPES
LIGHT NUCLEI
METALS
NICKEL
NONMETALS
NUCLEI
ODD-ODD NUCLEI
PERMEABILITY
STABLE ISOTOPES
TITANIUM ALLOYS
TRANSITION ELEMENTS