TY - JOUR
T1 - Effects of Mn and Microalloying Composition on Corrosion and Hydrogen-Induced Cracking of API 5L X65 Steels
AU - Quispe-Avilés, Janeth Marlene
AU - Fiori, Marco Aurélio Pereira
AU - Hincapie-Ladino, Duberney
AU - Ramirez, Oscar Mauricio Prada
AU - de Melo, Hercílio Gomes
N1 - Publisher Copyright:
© 2022 AMPP.
PY - 2022/8
Y1 - 2022/8
N2 - The corrosion and hydrogen-induced cracking (HIC) resistance as well as hydrogen permeation behavior of two API 5L X65 steels with different amounts of Mn and microalloying elements were compared. The corrosion behavior of both steels, evaluated using electrochemical impedance spectroscopy and polarization curves in solution A of NACE TM0284-16 standard with and without H2S saturation (sour medium), showed no relevant differences in each medium, which can be ascribed to their similar microstructures; however, the corrosion resistance of both steels was lower in the sour medium. The investigation of resistance to hydrogen-induced failures disclosed better performance for the low Mn steel. This was confirmed using a harsher HIC test performed in an HCl acidified sour medium and was ascribed to the presence of Nb carbides nanoprecipitates, as revealed by the scanning transmission electron microsccopy analysis.
AB - The corrosion and hydrogen-induced cracking (HIC) resistance as well as hydrogen permeation behavior of two API 5L X65 steels with different amounts of Mn and microalloying elements were compared. The corrosion behavior of both steels, evaluated using electrochemical impedance spectroscopy and polarization curves in solution A of NACE TM0284-16 standard with and without H2S saturation (sour medium), showed no relevant differences in each medium, which can be ascribed to their similar microstructures; however, the corrosion resistance of both steels was lower in the sour medium. The investigation of resistance to hydrogen-induced failures disclosed better performance for the low Mn steel. This was confirmed using a harsher HIC test performed in an HCl acidified sour medium and was ascribed to the presence of Nb carbides nanoprecipitates, as revealed by the scanning transmission electron microsccopy analysis.
KW - electrochemical impedance spectroscopy
KW - high-strength low alloy steel
KW - hydrogen embrittlement
KW - hydrogen permeation
KW - polarization
UR - http://www.scopus.com/inward/record.url?scp=85139074272&partnerID=8YFLogxK
U2 - 10.5006/3876
DO - 10.5006/3876
M3 - Original Article
AN - SCOPUS:85139074272
SN - 0010-9312
VL - 78
SP - 765
EP - 777
JO - Corrosion
JF - Corrosion
IS - 8
ER -