RT info:eu-repo/semantics/article
T1 Hydrogen uptake and diffusion kinetics in a quenched and tempered low carbon steel: experimental and numerical study
A1 Peral, Luis Borja
A1 Díaz Portugal, Andrés
A1 Alegre Calderón, Jesús Manuel
A1 Cuesta Segura, Isidoro Iván
K1 CrMo steel
K1 Surface science
K1 Electrochemistry at surfaces
K1 Hydrogen permeation
K1 Hydrogen trapping and diffusion
K1 Numerical modelling
K1 Ingeniería civil
K1 Civil engineering
K1 Resistencia de materiales
K1 Strength of materials
AB To better understand hydrogen uptake kinetics, electrochemical permeation tests have been performed in a quenched and tempered low-alloy steel. Hydrogen uptake and transport has been studied with three different surface roughness, in four different solutions (1 M H2SO4, 1 M H2SO4+As2O3, 0.1 M NaOH and 3.5% NaCl) and two different hydrogen charging current densities (1 and 5 mA/cm2). A strong effect of the charging solution, current density and surface roughness has been demonstrated. In 1 M H2SO4 + As2O3 solution and 5 mA/cm2, hydrogen recombination on the surface of the samples is strongly reduced and interstitial diffusion prevails due to the trap saturation (). However, in 1 M H2SO4, 0.1 M NaOH and 3.5% NaCl, hydrogen transport is dominated by trapping and detrapping processes (). Permeation transients are numerically reproduced through Finite Element simulations and compared to the experimental results. The relationship between hydrogen diffusion kinetics at the microstructural level and surface effects is clearly established by a mapping strategy obtained from the wide range of experimental results, combined with a numerical approach.
PB Elsevier
SN 0360-3199
YR 2023
FD 2023-06
LK http://hdl.handle.net/10259/7712
UL http://hdl.handle.net/10259/7712
LA eng
NO The authors would like to thank the Spanish Government for the financial support received to perform the research projects RTI2018-096070-B-C33 and PID2021-124768OB-C21. This work was supported by the Regional Government of Castilla y León (Junta de Castilla y León) and by the Ministry of Science and Innovation MICIN and the European Union Next Generation EU/PRTR (MR4W.P2 and MR5W.P3). L.B. Peral is also grateful for his Margarita Salas Postdoctoral contract (Ref.: MU-21-UP2021-030) funded by the University of Oviedo through the Next Generation European Union.
DS Repositorio Institucional de la Universidad de Burgos
RD 15-may-2024