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Diffusivity and solubility of hydrogen in the low activation martensitic steel LA12TaLN have been measured by a gas evolution method. It is shown that diffusivity is constant as a function of the saturation pressure and that the Arrhenius plot is not linear over all the temperature range. After an XPS analysis a strong increase in chromium oxide is observed and a significant presence of manganese oxide is seen. It is concluded that due to the presence of oxidising impurities in the experimental volume, LA12TaLN has increased its oxide layer forming a permeation barrier.

Additional information

Authors: ALBERICI S, Politecnico di Torino, Dipartimento di Energetica (IT);TOMINETTI S, Politecnico di Torino, Dipartimento di Energetica (IT);CAMPOSILVAN J, JRC Ispra (IT);PERUJO A, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Convegno Idrogeno e Metalli, Milano (IT), May 26-27, 1994
Availability: Available from (1) as Paper IT 38387 ORA
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