H Absorption into Metals

The effects of arsenic or sulphur-containing species on H permeation into Fe or mild-steel have attracted great interest. The absorption and permeation of H into transition metals is commonly enhanced by adsorbed catalyst poisons, which decrease the coverage by adsorbed H, the intermediate in the hydrogen evolution reaction. This unexpected direction of behaviour has remained inadequately explained. The H/Pd system has also attracted major interest because of its use as a permselective membrane for the generation of ultra-high purity hydrogen and as a model for interpretation of processes of H sorption into metals. Therefore the effects of chemisorption of arsenic or sulphur-containing species on H transfer into and through Fe, mild-steel, and comparatively, into Pd in aqueous NaOH solution, and its relation to the hydrogen coverage on the metal surface, has been extensively discussed here from a kinetic point of view. This book will be an invaluable reference for engineers and professionals involved in the hydrogen production, storage and embrittlement fields as well as the fuel cell industry.