dc.contributor.author | Smith, Nicholas Albert | |
dc.contributor.author | Gleeson, Brian | |
dc.contributor.author | wissam, saidi | |
dc.contributor.author | Kvithyld, Anne | |
dc.contributor.author | Tranell, Gabriella | |
dc.date.accessioned | 2020-12-23T13:15:49Z | |
dc.date.available | 2020-12-23T13:15:49Z | |
dc.date.created | 2019-04-03T12:37:26Z | |
dc.date.issued | 2018 | |
dc.identifier.issn | 0888-5885 | |
dc.identifier.uri | https://hdl.handle.net/11250/2720956 | |
dc.description.abstract | Al–Mg alloys are known to suffer from problematic oxidation during melting, refining, and casting. The use of a CO2/air cover gas is known to minimize this oxidation; however, a mechanistic understanding of the beneficial inhibiting effect is lacking. A series of thermogravimetric experiments were conducted under a variety of different CO2-containing atmospheres at 750 °C to elucidate the inhibiting effect. Characterization of the oxide layer was done by surface and cross-sectional analysis in the electron microscope and X-ray photoelectron spectrometry (XPS) depth profiling. It was found that additions of as little as 5% CO2 to air delayed the onset of breakaway oxidation for at least 7 h and gave a notable reduction in the mass gain compared to that seen upon exposure to air at 750 °C. The XPS depth profile showed a carbon-containing layer due to adsorbed CO2 at the top surface of the oxide layer. It was inferred that this carbon-containing layer slowed the transport of Mg vapor from the metal through the oxide layer, resulting in a reduction in the amount of Mg vapor available for oxidation. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | ACS Publications | en_US |
dc.subject | Oxidation | en_US |
dc.subject | Oxygen | en_US |
dc.subject | Layers | en_US |
dc.subject | Atmospheric chemistry,Oxides | en_US |
dc.title | Mechanism behind the Inhibiting Effect of CO2 on the Oxidation of Al−Mg Alloys | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | en_US |
dc.rights.holder | © American Chemical Society 2018. This is the authors accepted and refereed manuscript to the article. | en_US |
dc.source.pagenumber | 1434-1442 | en_US |
dc.source.volume | 58 | en_US |
dc.source.journal | Industrial & Engineering Chemistry Research | en_US |
dc.source.issue | 3 | en_US |
dc.identifier.doi | 10.1021/acs.iecr.8b04691 | |
dc.identifier.cristin | 1689957 | |
cristin.unitcode | 7401,80,63,0 | |
cristin.unitname | Metallproduksjon og prosessering | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |