Effects of the cementite morphology on the hydrogen trapping behavior in the pipeline steel
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 26 May 2023
Issue publication date: 13 June 2023
Abstract
Purpose
The purpose of this study is to investigate the effects of the cementite morphology on the hydrogen trapping behavior in low-alloy pipeline steel.
Design/methodology/approach
In this study, the hydrogen trapping behavior in low-alloy pipeline steel was quantitatively studied by a combination of microstructural observations, electrochemical hydrogen permeation experiments and thermal desorption spectroscopy (TDS) analyses.
Findings
P-1 and P-2 steels are two samples with different microstructures. The morphology of cementite precipitates in the P-1 and P-2 steels was different. Lamellar cementite is present in P-2 steel and only granular cementite in P-1 steel, which led to a better irreversible hydrogen trapping ability of P-2 steel, which was confirmed by subsequent hydrogen permeation and TDS experiments.
Originality/value
The study of these deep hydrogen trap sites is helpful in improving the hydrogen embrittlement resistance of low-alloy pipeline steels.
Keywords
Acknowledgements
The authors acknowledge the financial support received from the Science Center for Gas Turbine Project (No. P2022-B-IV-008–001) and National Natural Science Foundation of China (Nos. 51922002 and 52201060).
Declaration of competing interest: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Citation
Tu, Y., Liu, S., Shi, R., Yang, S., Gao, K. and Pang, X. (2023), "Effects of the cementite morphology on the hydrogen trapping behavior in the pipeline steel", Anti-Corrosion Methods and Materials, Vol. 70 No. 4, pp. 141-148. https://doi.org/10.1108/ACMM-02-2023-2761
Publisher
:Emerald Publishing Limited
Copyright © 2023, Emerald Publishing Limited