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Microstructural Effects in the Development of Near-Neutral pH Stress Corrosion Cracks in Pipelines
The corrosion and stress corrosion cracking (SCC) behaviors of 20#, X60, and X80 pipeline steels in a near-neutral pH environment were investigated by means of electrochemical measurement, immersion test, and interrupted slow strain rate tensile (SSRT) test. The propensity for SCC, as indicated by t...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267810/ https://www.ncbi.nlm.nih.gov/pubmed/35806497 http://dx.doi.org/10.3390/ma15134372 |
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author | Zhang, Ci Ran, Minrui Wang, Yao Zheng, Wenyue |
author_facet | Zhang, Ci Ran, Minrui Wang, Yao Zheng, Wenyue |
author_sort | Zhang, Ci |
collection | PubMed |
description | The corrosion and stress corrosion cracking (SCC) behaviors of 20#, X60, and X80 pipeline steels in a near-neutral pH environment were investigated by means of electrochemical measurement, immersion test, and interrupted slow strain rate tensile (SSRT) test. The propensity for SCC, as indicated by the stress threshold value for crack initiation, was found to be dependent on the type of steel microstructure. Cracks were initiated in the high-strength steel X80 at a stress less than its yield strength, whereas in the other lower-grade steels, the initiation of cracks occurred after the yielding point. The threshold stress of SCC initiation in the near-neutral pH environment for 20#, X60, and X80 steels were 130.64% σ(ys), 106.79% σ(ys), and 86.92% σ(ys), respectively. The SCC of 20# and X60 were characterized by the formation of transgranular and intergranular cracks, while X80 steel was only by transgranular cracking. The occurrence of corrosion had a great effect on crack initiation and the growth at the later stage. The latter involved hydrogen effects. A correlation between SCC sensitivity and the yield strength of the steel has been identified. |
format | Online Article Text |
id | pubmed-9267810 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-92678102022-07-09 Microstructural Effects in the Development of Near-Neutral pH Stress Corrosion Cracks in Pipelines Zhang, Ci Ran, Minrui Wang, Yao Zheng, Wenyue Materials (Basel) Article The corrosion and stress corrosion cracking (SCC) behaviors of 20#, X60, and X80 pipeline steels in a near-neutral pH environment were investigated by means of electrochemical measurement, immersion test, and interrupted slow strain rate tensile (SSRT) test. The propensity for SCC, as indicated by the stress threshold value for crack initiation, was found to be dependent on the type of steel microstructure. Cracks were initiated in the high-strength steel X80 at a stress less than its yield strength, whereas in the other lower-grade steels, the initiation of cracks occurred after the yielding point. The threshold stress of SCC initiation in the near-neutral pH environment for 20#, X60, and X80 steels were 130.64% σ(ys), 106.79% σ(ys), and 86.92% σ(ys), respectively. The SCC of 20# and X60 were characterized by the formation of transgranular and intergranular cracks, while X80 steel was only by transgranular cracking. The occurrence of corrosion had a great effect on crack initiation and the growth at the later stage. The latter involved hydrogen effects. A correlation between SCC sensitivity and the yield strength of the steel has been identified. MDPI 2022-06-21 /pmc/articles/PMC9267810/ /pubmed/35806497 http://dx.doi.org/10.3390/ma15134372 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zhang, Ci Ran, Minrui Wang, Yao Zheng, Wenyue Microstructural Effects in the Development of Near-Neutral pH Stress Corrosion Cracks in Pipelines |
title | Microstructural Effects in the Development of Near-Neutral pH Stress Corrosion Cracks in Pipelines |
title_full | Microstructural Effects in the Development of Near-Neutral pH Stress Corrosion Cracks in Pipelines |
title_fullStr | Microstructural Effects in the Development of Near-Neutral pH Stress Corrosion Cracks in Pipelines |
title_full_unstemmed | Microstructural Effects in the Development of Near-Neutral pH Stress Corrosion Cracks in Pipelines |
title_short | Microstructural Effects in the Development of Near-Neutral pH Stress Corrosion Cracks in Pipelines |
title_sort | microstructural effects in the development of near-neutral ph stress corrosion cracks in pipelines |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267810/ https://www.ncbi.nlm.nih.gov/pubmed/35806497 http://dx.doi.org/10.3390/ma15134372 |
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