Galvanic Corrosion of Carbon Steel in Carbon Dioxide Caused by Magnetite Paper Number 3092
Complex environments in oil and gas production systems often result in the deposition of various corrosion product scales on the carbon steel surface. It is not widely recognized that many iron corrosion products, particularly magnetite, are nonmetallic semiconductors that furnish galvanic coupling...
| Main Authors: | , , , |
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| Format: | Conference Paper |
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NACE International
2008
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| Online Access: | http://hdl.handle.net/20.500.11937/10192 |
| _version_ | 1848746164717879296 |
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| author | Chan, E. John, Doug Bailey, Stuart Kinsella, Brian |
| author2 | Bruce Miglin |
| author_facet | Bruce Miglin Chan, E. John, Doug Bailey, Stuart Kinsella, Brian |
| author_sort | Chan, E. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Complex environments in oil and gas production systems often result in the deposition of various corrosion product scales on the carbon steel surface. It is not widely recognized that many iron corrosion products, particularly magnetite, are nonmetallic semiconductors that furnish galvanic coupling to their base metal, resulting in galvanic corrosion. Laser Raman spectroscopy is a very powerful analysis technique that has been applied to identify iron oxides/hydroxides such as magnetite (Fe3O4), hematite (Fe2O3), goethite (a-FeOOH) and lepidocrocite (?-FeOOH) based on the unique Raman spectral band.A galvanic couple of magnetite with mild steel was investigated under a carbon dioxide atmosphere, and this indeed demonstrated galvanic corrosion of the steel. The effects of carbon dioxide partial pressure, solution pH and cathode to anode surface area ratio of the magnetite/mild steel couple were studied and all of these factors were found to have a significant effect on the galvanic corrosion rate.The presence of magnetite scale may explain the high localised corrosion rates experienced in some oil production lines operating at low partial pressures of CO2 and environments normally considered non-corrosive. Corrosion inhibitors with high inhibition efficiency in carbon dioxide corrosion of mild steel were tested, and were found not to be as effective in galvanic corrosion control. An understanding of the electrochemistry and chemistry of the corrosion products will be the key to resolve this problem. |
| first_indexed | 2025-11-14T06:28:54Z |
| format | Conference Paper |
| id | curtin-20.500.11937-10192 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:28:54Z |
| publishDate | 2008 |
| publisher | NACE International |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-101922017-01-30T11:17:21Z Galvanic Corrosion of Carbon Steel in Carbon Dioxide Caused by Magnetite Paper Number 3092 Chan, E. John, Doug Bailey, Stuart Kinsella, Brian Bruce Miglin Raman spectroscopy iron oxides corrosion product scale Galvanic corrosion magnetite Complex environments in oil and gas production systems often result in the deposition of various corrosion product scales on the carbon steel surface. It is not widely recognized that many iron corrosion products, particularly magnetite, are nonmetallic semiconductors that furnish galvanic coupling to their base metal, resulting in galvanic corrosion. Laser Raman spectroscopy is a very powerful analysis technique that has been applied to identify iron oxides/hydroxides such as magnetite (Fe3O4), hematite (Fe2O3), goethite (a-FeOOH) and lepidocrocite (?-FeOOH) based on the unique Raman spectral band.A galvanic couple of magnetite with mild steel was investigated under a carbon dioxide atmosphere, and this indeed demonstrated galvanic corrosion of the steel. The effects of carbon dioxide partial pressure, solution pH and cathode to anode surface area ratio of the magnetite/mild steel couple were studied and all of these factors were found to have a significant effect on the galvanic corrosion rate.The presence of magnetite scale may explain the high localised corrosion rates experienced in some oil production lines operating at low partial pressures of CO2 and environments normally considered non-corrosive. Corrosion inhibitors with high inhibition efficiency in carbon dioxide corrosion of mild steel were tested, and were found not to be as effective in galvanic corrosion control. An understanding of the electrochemistry and chemistry of the corrosion products will be the key to resolve this problem. 2008 Conference Paper http://hdl.handle.net/20.500.11937/10192 NACE International restricted |
| spellingShingle | Raman spectroscopy iron oxides corrosion product scale Galvanic corrosion magnetite Chan, E. John, Doug Bailey, Stuart Kinsella, Brian Galvanic Corrosion of Carbon Steel in Carbon Dioxide Caused by Magnetite Paper Number 3092 |
| title | Galvanic Corrosion of Carbon Steel in Carbon Dioxide Caused by Magnetite Paper Number 3092 |
| title_full | Galvanic Corrosion of Carbon Steel in Carbon Dioxide Caused by Magnetite Paper Number 3092 |
| title_fullStr | Galvanic Corrosion of Carbon Steel in Carbon Dioxide Caused by Magnetite Paper Number 3092 |
| title_full_unstemmed | Galvanic Corrosion of Carbon Steel in Carbon Dioxide Caused by Magnetite Paper Number 3092 |
| title_short | Galvanic Corrosion of Carbon Steel in Carbon Dioxide Caused by Magnetite Paper Number 3092 |
| title_sort | galvanic corrosion of carbon steel in carbon dioxide caused by magnetite paper number 3092 |
| topic | Raman spectroscopy iron oxides corrosion product scale Galvanic corrosion magnetite |
| url | http://hdl.handle.net/20.500.11937/10192 |