TY - JOUR
T1 - Effect of Carbon Content and Microstructure on the Diffusion of Hydrogen in Low Carbon Steels
AU - Arenas-Salcedo, J. G.
AU - Godínez-Salcedo, J. G.
AU - González-Velázquez, J. L.
AU - Medina-Huerta, J. M.
N1 - Publisher Copyright:
© 2020. All Rights Reserved.
PY - 2020
Y1 - 2020
N2 - In this work, the electrochemical permeation technique proposed in the ASTM-G148-97 Ed 2011 standard was used to determine the maximum oxidation current density, imax; breakthrough time; tb, effective hydrogen diffusion coefficient, Deff; and surface hydrogen concentration, CHO, for several API 5L steels. The results show that steels with a carbon content of less than or equal to 0.052 %wt and a ferritic-bainitic microstructure have higher Deff and imax values than steels with a higher carbon content and a ferritic-pearlitic microstructure, while the CHO and tb parameters show a clear tendency to decrease when the microstructure changes from ferritic-pearlitic to ferritic-bainitic. The Deff values obtained in this work are consistent with published data, both in terms of their magnitude and in relation to the effects of carbon content and microstructure.
AB - In this work, the electrochemical permeation technique proposed in the ASTM-G148-97 Ed 2011 standard was used to determine the maximum oxidation current density, imax; breakthrough time; tb, effective hydrogen diffusion coefficient, Deff; and surface hydrogen concentration, CHO, for several API 5L steels. The results show that steels with a carbon content of less than or equal to 0.052 %wt and a ferritic-bainitic microstructure have higher Deff and imax values than steels with a higher carbon content and a ferritic-pearlitic microstructure, while the CHO and tb parameters show a clear tendency to decrease when the microstructure changes from ferritic-pearlitic to ferritic-bainitic. The Deff values obtained in this work are consistent with published data, both in terms of their magnitude and in relation to the effects of carbon content and microstructure.
KW - Electrochemical Permeation Technique
KW - diffusion equations
KW - hydrogen diffusion
UR - http://www.scopus.com/inward/record.url?scp=85097741260&partnerID=8YFLogxK
U2 - 10.20964/2020.11.39
DO - 10.20964/2020.11.39
M3 - Artículo
AN - SCOPUS:85097741260
SN - 1452-3981
VL - 15
SP - 11606
EP - 11622
JO - International Journal of Electrochemical Science
JF - International Journal of Electrochemical Science
IS - 11
ER -