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Global and local corrosion of welded joints of high-strength low-alloy automotive steel

Mainã Garcia, Juliana de Souza, Carol Glover, Philip Ansell, Geraint Williams Orcid Logo, Gerson Mantovani, Vasant Kumar R, Renato Antunes

Corrosion, Volume: 77, Issue: 5, Pages: 564 - 576

Swansea University Authors: Carol Glover, Philip Ansell, Geraint Williams Orcid Logo

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DOI (Published version): 10.5006/3718

Abstract

Global and local corrosion techniques were used to study the corrosion behaviour of weld joints of a high strength low alloy steel (LNE500), typically employed in the automotive industry, in Brazil. The welded joints were prepared by gas metal arc welding (GMAW). Two welding transfer modes were used...

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Published in: Corrosion
ISSN: 0010-9312 1938-159X
Published: NACE International 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa56352
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spelling 2021-08-16T15:03:02.7533345 v2 56352 2021-03-02 Global and local corrosion of welded joints of high-strength low-alloy automotive steel f1c17580848e7967d7c2111d4cb3516c Carol Glover Carol Glover true false 8889433e9478f045d656ce784a9d79ed Philip Ansell Philip Ansell true false 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 2021-03-02 EEN Global and local corrosion techniques were used to study the corrosion behaviour of weld joints of a high strength low alloy steel (LNE500), typically employed in the automotive industry, in Brazil. The welded joints were prepared by gas metal arc welding (GMAW). Two welding transfer modes were used in order to obtain different heat inputs (HI): pulsed (PUL) and cold metal transfer (CMT). Local and global corrosion analysis techniques presented complementary information. While the local in-situ analysis (scanning vibrating electrode technique) revealed the weld metal (WM) as the region where corrosion started, conventional electrochemical techniques (Potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS)) revealed a higher corrosion rate in the coarse-grained heat affected zone (CGHAZ), which was preferentially corroded. A superior corrosion resistance of the weld metal obtained using CMT over the PUL transfer mode was revealed by EIS and PP. In addition, the results from CMT and PUL samples show that austenite grain size affects the propagation of the corrosion process. The results are discussed based on microstructural and compositional aspects of the different regions that characterize the welded joints. Journal Article Corrosion 77 5 564 576 NACE International 0010-9312 1938-159X 1 5 2021 2021-05-01 10.5006/3718 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2021-08-16T15:03:02.7533345 2021-03-02T08:56:36.3708585 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Mainã Garcia 1 Juliana de Souza 2 Carol Glover 3 Philip Ansell 4 Geraint Williams 0000-0002-3399-5142 5 Gerson Mantovani 6 Vasant Kumar R 7 Renato Antunes 8 56352__19399__91b4afab1b79451a82c9080f7bdc4531.pdf 56352.pdf 2021-03-02T08:58:13.2714980 Output 1172769 application/pdf Accepted Manuscript true 2021-05-21T00:00:00.0000000 true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Global and local corrosion of welded joints of high-strength low-alloy automotive steel
spellingShingle Global and local corrosion of welded joints of high-strength low-alloy automotive steel
Carol Glover
Philip Ansell
Geraint Williams
title_short Global and local corrosion of welded joints of high-strength low-alloy automotive steel
title_full Global and local corrosion of welded joints of high-strength low-alloy automotive steel
title_fullStr Global and local corrosion of welded joints of high-strength low-alloy automotive steel
title_full_unstemmed Global and local corrosion of welded joints of high-strength low-alloy automotive steel
title_sort Global and local corrosion of welded joints of high-strength low-alloy automotive steel
author_id_str_mv f1c17580848e7967d7c2111d4cb3516c
8889433e9478f045d656ce784a9d79ed
0d8fc8d44e2a3c88ce61832f66f20d82
author_id_fullname_str_mv f1c17580848e7967d7c2111d4cb3516c_***_Carol Glover
8889433e9478f045d656ce784a9d79ed_***_Philip Ansell
0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
author Carol Glover
Philip Ansell
Geraint Williams
author2 Mainã Garcia
Juliana de Souza
Carol Glover
Philip Ansell
Geraint Williams
Gerson Mantovani
Vasant Kumar R
Renato Antunes
format Journal article
container_title Corrosion
container_volume 77
container_issue 5
container_start_page 564
publishDate 2021
institution Swansea University
issn 0010-9312
1938-159X
doi_str_mv 10.5006/3718
publisher NACE International
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
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description Global and local corrosion techniques were used to study the corrosion behaviour of weld joints of a high strength low alloy steel (LNE500), typically employed in the automotive industry, in Brazil. The welded joints were prepared by gas metal arc welding (GMAW). Two welding transfer modes were used in order to obtain different heat inputs (HI): pulsed (PUL) and cold metal transfer (CMT). Local and global corrosion analysis techniques presented complementary information. While the local in-situ analysis (scanning vibrating electrode technique) revealed the weld metal (WM) as the region where corrosion started, conventional electrochemical techniques (Potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS)) revealed a higher corrosion rate in the coarse-grained heat affected zone (CGHAZ), which was preferentially corroded. A superior corrosion resistance of the weld metal obtained using CMT over the PUL transfer mode was revealed by EIS and PP. In addition, the results from CMT and PUL samples show that austenite grain size affects the propagation of the corrosion process. The results are discussed based on microstructural and compositional aspects of the different regions that characterize the welded joints.
published_date 2021-05-01T04:06:46Z
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