| Title: | Elucidating nucleation stages of transgranular stress corrosion cracking in austenitic stainless steel by in situ electrochemical and optical methods |
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| Authors: | ID Helmuth, Sarmiento Klapper (Author)
ID Zajec, Bojan (Author)
ID Heyn, Andreas (Author)
ID Legat, Andraž (Author) |
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| Files: |  URL - Source URL, visit http://jes.ecsdl.org/content/166/11/C3326.full.pdf+html
 PDF - Presentation file, download (2,28 MB)
MD5: A1423C20506CC63A07ADFBD072F9D4F9
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| Abstract: | The pitting and environmentally assisted cracking resistance of austenitic stainless steels (SS) is challenged in several industrial applications particularly those involving hot chloride-concentrated streams. Directional drilling used in the oil and gas exploration is one of these applications. Indeed, high strength CrMn-SS commonly used in drilling technology have a high tendency to fail by stress corrosion cracking (SCC) preceded by localized corrosion once subjected to highly chloride-concentrated drilling fluids at elevated temperatures. A comprehensive understanding regarding the mechanisms governing the transition from pitting into SCCis not currently available, though. Therefore, mechanistic aspects such as the effect of loading conditions on pit nucleation and repassivation as well as the synergistic effect between pit stabilization and the nucleation of a stress corrosion crack are of great practical significance. To investigate this an electrochemical-, optical- and mechanical- monitored SCC test was conducted on a CrMn-SS in an alkaline brine at elevated temperature. The transition from metastable to stable pitting and subsequently to SCC in this system was documented in-situ for the first time. Results supported H.S. Isaacs postulates regarding the interpretation of electrochemical signals and demonstrated that loading conditions affect pit nucleation and repassivation leading to a higher susceptibility of the material to pitting, which preceded SCC. |
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| Keywords: | pitting corrosion, stress corrosion cracking, monitoring, elektrochemical noise, austenitic stainless steel |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 31.05.2019 |
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| Publisher: | Electrochemical Society |
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| Year of publishing: | 2019 |
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| Number of pages: | str. C3326-C3335 |
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| Numbering: | Vol. 166, iss. 11 |
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| PID: | 20.500.12556/DiRROS-17327  |
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| UDC: | 544.5/.6 |
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| ISSN on article: | 1945-7111 |
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| DOI: | 10.1149/2.0411911jes |
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| COBISS.SI-ID: | 2482535 |
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| Copyright: | © The Author(s) 2019. Published by ECS. |
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| Note: | Nasl. z nasl. zasl.;
Opis vira z dne 27. 8. 2019;
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| Publication date in DiRROS: | 23.11.2023 |
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| Views: | 658 |
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| Downloads: | 424 |
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