Modeling of combined anodic dissolution / hydrogen assisted stress corrosion cracking of low alloyed power plant steels in high temperature water environments
- High temperature SSRT - ductility data from cathodic hydrogen charging of 10CrMo910 and 7CrMoVTiB1010 are implemented into a mathematical model of SCC at various operational conditions including temperatures, pH and dissolved hydrogen/oxygen contents as well as global stresses and material properties. The results show that, as a consequence of experimentally verified local acidification at initial anodic path corrosion, subsequent local hydrogen assisted cracking can be a controlling factor for SCC in high temperature water. As a particular effect at global stresses close to the yield point, operational temperatures around 270°C exhibit peak crack growth rates depending on dissolved hydrogen, oxygen, pH and global stress, which has been found to be consistent for both, experimental studies and mathematical modeling.
MetadatenAutor*innen: | H. Hoffmeister, Thomas Böllinghaus |
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Dokumenttyp: | Zeitschriftenartikel |
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Veröffentlichungsform: | Verlagsliteratur |
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Sprache: | Englisch |
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Titel des übergeordneten Werkes (Englisch): | Corrosion |
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Jahr der Erstveröffentlichung: | 2014 |
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Verlag: | National Association of Corrosion Engineers |
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Verlagsort: | Houston, Tex. |
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Jahrgang/Band: | 70 |
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Ausgabe/Heft: | 6 |
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Erste Seite: | 563 |
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Letzte Seite: | 578 |
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Freie Schlagwörter: | Anodic acidification; Hydrogen assisted cracking; Iron oxide precipitation; Slow strain rate testing; Stress corrosion cracking |
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DOI: | 10.5006/1048 |
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ISSN: | 0010-9312 |
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ISSN: | 1938-159X |
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Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
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Datum der Freischaltung: | 20.02.2016 |
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Referierte Publikation: | Ja |
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Datum der Eintragung als referierte Publikation: | 03.02.2014 |
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