Palladium has been the membrane of choice for hydrogen purification and separation systems because of its high permeability and good mechanical characteristics. Other membrane technologies are being investigated because of the high cost associated with palladium. The Nb-Ti-Ni and V-Ti-Ni alloys were evaluated for their permeability and oxidation characteristics. These alloys have showed some promise in comparison to palladium. Electrochemical testing was conducted in the Devanathan permeation cell and Greene-type electrochemical vessels. The vanadium-based and niobium-based alloys were found to have comparable permeation rates to palladium. The polarization and microstructural characteristics of the alloys were studied to characterize the oxidation and microstructure effects on hydrogen permeation.

Subject
Hydrogen permeation, Corrosion resistant alloys, Corrosion currents, Nickel based alloys, Permeability, Palladium, Vanadium, Niobium, Permeation current, Permeation, Titanium alloys, Alloys, Hydrogen
Keywords:
electrochemical hydrogen permeation, Nb-Ti-Ni alloy, V-Ti-Ni alloy, membranes
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2006
GOV
You do not currently have access to this content.