Title
Hydrogen-induced cracking and corrosion behavior of friction stir welded plates of API 5L X70 pipeline steel
Date Issued
10 August 2021
Access level
open access
Resource Type
journal article
Author(s)
University of São Paulo
Publisher(s)
Elsevier Ltd
Abstract
The use of friction stir welding (FSW) has proven to be an excellent alternative to join engineering components. Although FSW has had a significant development in recent years, challenges for new applications have been raised, such as offshore steel parts suffering hydrogen embrittlement in the gas and oil industry. Therefore, in this work, the microstructure, corrosion, and hydrogen-induced cracking were investigated in a two-pass FSW welded joint of API 5L X70 pipeline steel. The electrochemical results indicate an inhibitory effect on corrosion reaction because of a carbonate product generation in the steel surface. The polygonal ferritic and degenerated pearlite bands microstructure in the base metal fixed carbonate deposits in the steel surface. In the welded regions, the bainitic microstructure and the carbide particle distribution are less efficient in setting the weld surface carbonate deposit. HIC tests showed cracks initiation and propagation to be more prone in hard phases.
Start page
28166
End page
28179
Volume
46
Issue
55
Language
English
OCDE Knowledge area
Ingeniería de materiales
Subjects
Scopus EID
2-s2.0-85110421874
Source
International Journal of Hydrogen Energy
ISSN of the container
03603199
Sponsor(s)
Joseane Giarola would like to acknowledge the National Council for Scientific and Technological Development, CNPq”, Scholarship - Brazil.” Process: 165065/2017-6.The authors acknowledge the National Council for Scientific and Technological Development scholarship, CNPq – Brazil, grant number: 165065/2017-6. This research used the facilities of the Brazilian Nanotechnology National Laboratory (LNNano), part of the Brazilian Center for Research in Energy and Materials (CNPEM) for the Brazilian Ministry for Science, Technology, and Innovations (MCTI). The Electron Microscopy staff is acknowledge for the assistance during the experiments (SEM-C1 - 25351 and 25352). The author would like to thank the staff in the University of São Paulo, specifically in the Materials Engineering Department at the São Carlos School of Engineering (SMM, EESC-USP) and Electrochemical Process Laboratory at the Polytechnic School of Engineering (LPE, PMT-USP).
Sources of information:
Directorio de Producción Científica
Scopus