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Organic inhibitors for hydrogen permeation in iron

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Abstract

Organic molecules have been added to gaseous hydrogen to assess their effect on hydrogen permeation through iron. Ethylene and ethane reduce the hydrogen permeation rate by up to a factor of 50 at 200°C, while methane has a negligible effect. Removing the ethylene or ethane from the gas allows the original higher permeation rate to resume. 1,2-dibromoethylene reduces the permeation rate by up to a factor of 90; this compound is difficult to remove from the surface once it is adsorbed. These effects are rationalized on the basis of adsorption of ethylene, ethane, or dibromoethylene at adjacent metal surface sites, blocking these sites to hydrogen adsorption, dissociation and entry into the metal.

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Authors and Affiliations

  1. Physical Metallurgy, Rockwell International Science Center, 1049Camino Dos Rios, 91360, Thousand Oaks, CA

    Wayne M. Robertson (Member of the Technical Staff)

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  1. Wayne M. Robertson
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Robertson, W.M. Organic inhibitors for hydrogen permeation in iron. Metall Trans A 11, 1207–1212 (1980). https://doi.org/10.1007/BF02668144

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  • DOI: https://doi.org/10.1007/BF02668144

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