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Effect of trace dissolved oxygen on the cathodic kinetics of carbon dioxide corrosion of carbon steel.

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Open access
Authors
John, Doug
Bailey, Stuart
Kinsella, Brian
De Marco, Roland
Date
2008
Type
Conference Paper

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John, Douglas and Bailey, Stuart and Kinsella, Brian and De Marco, Roland. 2008. Effect of trace dissolved oxygen on the cathodic kinetics of carbon dioxide corrosion of carbon steel. Paper number 053, in Wesley Fawaz (ed), Corrosion and Prevention 2008, Nov 16 2008.New Zealand: Australasian Corrosion Association Inc.
Source Title
Proceeding of Corrosion and Prevention 2008
Source Conference
Corrosion and Prevention 2008
ISSN
Faculty
Faculty of Science and Computing
School of Science and Computing
Department of Computing
Faculty of Science and Engineering
Remarks

The Proceedings of the Corrosion and Prevention 2008 Conference are published by Australasian Corrosion Association Inc, home page : http://www.corrosion.com.au/.

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Abstract

Summary: The corrosion of carbon steel in carbon dioxide saturated brine solutions is controlled by a mixed activation-mass transfer process in the cathodic reaction mechanism. Cathodic polarisation curves of carbon steel in carbonic acid solutions exhibit a limiting current behaviour that is dependent on the rate of mass transfer. In studies using the jet impingement technique, the magnitude of this limiting current behaviour has been found to be strongly affected by the presence of trace levels of dissolved oxygen. This paper presents a theoretical assessment of the mass transfer limited cathodic current to illustrate the pronounced effect of dissolved oxygen contamination <15ppb. Discussion is presented regarding the implications of dissolved oxygen contamination on the interpretation of the mechanism of carbon dioxide corrosion.