0434280 - ÚFM 2015 RIV GB eng J - Journal Article
Svoboda, Jiří - Mori, G. - Prethaler, A. - Fischer, F. D.
Determination of trapping parameters and the chemical diffusion coefficient from hydrogen permeation experiments.
Corrosion Science. Roč. 82, MAY (2014), s. 93-100. ISSN 0010-938X. E-ISSN 1879-0496
Institutional support: RVO:68081723
Keywords : Steel * Electrochemical calculation * Modeling studies * Hydrogen permeation * Kinetic parameters
Subject RIV: BJ - Thermodynamics
Impact factor: 4.422, year: 2014 ; AIS: 0.883, rok: 2014
DOI: https://doi.org/10.1016/j.corsci.2014.01.002

An improved diffusion theory accounting for trapping effects is applied to evaluation of hydrogen permeation experiments performed for pure iron and pearlitic and martensitic steels. The trapping parameters as molar volume and depth of traps are determined by fitting experiments by simulations based on the theory. The concentration-dependent chemical diffusion coefficient of hydrogen is extracted indicating that the trapping effect on diffusion in pure iron and pearlitic steel is negligible. However, it is significant for martensitic steel, for which the chemical diffusion coefficient cannot be considered as concentration independent as it is established in current standards.
Permanent Link: http://hdl.handle.net/11104/0238484