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Simulation of the Hydrogen Permeation Behavior of X80 Pipeline Steels in H2S Saturated Environment by Cathodic-Charging Method

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Abstract:

Hydrogen-charging with various current densities was used to introduce hydrogen into X80 pipeline steel. The permeability (J∞L), the apparent diffusivity (Dapp) and the solubility of hydrogen (Capp)in X80 pipeline steels which were calculated by electrochemical hydrogen permeation curves were compared with those obtained from that of X80 pipeline steels in H2S saturated environment. Results show that in 0.5 mol/L H2SO4 + 3.1×10-3 mol/L Na4P2O7 (hydrogen evolution poison) solution, when hydrogen-charging current density is 30 mA/cm2, the kinetic parameters of hydrogen permeation of X80 pipeline steels agree with that of H2S saturated environment well. Another two heat-treatment specimens of X80 pipeline steel furthermore verified the reliability of the simulating results.

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Periodical:

Advanced Materials Research (Volume 650)

Pages:

72-77

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.650.72

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Online since:

January 2013

Authors:

Feng Huang, Wei Yuan, Qian Hu, Jing Liu, Yan Miao Qu

Keywords:

Cathodic-Charging Method, H2S Saturated Environment, Hydrogen Permeation Behavior, X80 Pipeline Steels

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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