Local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels
Intergranular stress corrosion cracking (IGSCC) of weldable martensitic stainless steels (WMSS) has been a major concern in the oil and gas industry. It occurs under sweet and mildly sour wet service conditions and in the presence of hot chlorides. The cracking phenomenon is assumed to be due to the...
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| Format: | Conference Paper |
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Omnipress
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/12007 |
| _version_ | 1848747959039033344 |
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| author | Maier, J. Kinsella, Brian Bailey, Stuart Becker, Thomas Ladwein, T. |
| author2 | NACE |
| author_facet | NACE Maier, J. Kinsella, Brian Bailey, Stuart Becker, Thomas Ladwein, T. |
| author_sort | Maier, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Intergranular stress corrosion cracking (IGSCC) of weldable martensitic stainless steels (WMSS) has been a major concern in the oil and gas industry. It occurs under sweet and mildly sour wet service conditions and in the presence of hot chlorides. The cracking phenomenon is assumed to be due to the formation of chromiumrich carbides on former austenite grain boundaries in the heat affected zone of the weld. The chromium depletion in the surrounding matrix results in susceptibility to IGSCC. A combined approach using localized electrochemical measurements and scanning probe microscopy (SPM) techniques was utilized to locate sensitized zones in rich grade WMSS. The electrochemical measurements were performed using a custom built micro cell allowing measurements on small spot sizes. The resulting etched working electrode surfaces were then examined by atomic force microscopy (AFM). The electrochemical results corresponded well with local metal dissolution and etching imprints obtained using AFM respectively. Performing local electrochemical tests in combination with SPM investigation proved very valuable. The imprint on the working electrode surface left after electrochemical analysis revealed sensitized zones in both actual welded samples and simulated welded samples. |
| first_indexed | 2025-11-14T06:57:25Z |
| format | Conference Paper |
| id | curtin-20.500.11937-12007 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:57:25Z |
| publishDate | 2009 |
| publisher | Omnipress |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-120072017-10-02T02:27:28Z Local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels Maier, J. Kinsella, Brian Bailey, Stuart Becker, Thomas Ladwein, T. NACE AFM WMSS IGSCC Micro-electrochemistry EPR Intergranular stress corrosion cracking (IGSCC) of weldable martensitic stainless steels (WMSS) has been a major concern in the oil and gas industry. It occurs under sweet and mildly sour wet service conditions and in the presence of hot chlorides. The cracking phenomenon is assumed to be due to the formation of chromiumrich carbides on former austenite grain boundaries in the heat affected zone of the weld. The chromium depletion in the surrounding matrix results in susceptibility to IGSCC. A combined approach using localized electrochemical measurements and scanning probe microscopy (SPM) techniques was utilized to locate sensitized zones in rich grade WMSS. The electrochemical measurements were performed using a custom built micro cell allowing measurements on small spot sizes. The resulting etched working electrode surfaces were then examined by atomic force microscopy (AFM). The electrochemical results corresponded well with local metal dissolution and etching imprints obtained using AFM respectively. Performing local electrochemical tests in combination with SPM investigation proved very valuable. The imprint on the working electrode surface left after electrochemical analysis revealed sensitized zones in both actual welded samples and simulated welded samples. 2009 Conference Paper http://hdl.handle.net/20.500.11937/12007 Omnipress restricted |
| spellingShingle | AFM WMSS IGSCC Micro-electrochemistry EPR Maier, J. Kinsella, Brian Bailey, Stuart Becker, Thomas Ladwein, T. Local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels |
| title | Local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels |
| title_full | Local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels |
| title_fullStr | Local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels |
| title_full_unstemmed | Local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels |
| title_short | Local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels |
| title_sort | local electrochemistry and scanning probe microscopy techniques to clarify intergranular cracking phenomena in weldable martensitic stainless steels |
| topic | AFM WMSS IGSCC Micro-electrochemistry EPR |
| url | http://hdl.handle.net/20.500.11937/12007 |