Hydrogen permeation through metals

Thesis/Dissertation · Tue Jan 01 00:00:00 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
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

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