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Cathodic mass transfer relationship of carbonic acid solutions with trace dissolved oxygen contamination. Paper number 2731

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

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Citation
John, Doug and Kinsella, Brian and Bailey, Stuart and De Marco, Roland. 2008. Cathodic mass transfer relationship of carbonic acid solutions with trace dissolved oxygen contamination. Paper number 2731, in Bruce Miglin (ed), ICC2008, Oct 6 2008. Las Vegas: NACE International.
Source Title
Proceeding of International Corrosion Congress 2008
Source Conference
ICC2008
Faculty
Faculty of Science and Computing
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Abstract

Cathodic polarisation curves of carbon steel in carbonic acid solutions typically exhibit alimiting current behaviour that has been associated with the rate of mass transfer. In studiesusing the jet impingement technique, the magnitude of this limiting current behaviour hasbeen found to be strongly affected by the presence of trace dissolved oxygen. This paperpresents a theoretical assessment of the mass transfer limited cathodic current to illustratethe pronounced effect of dissolved oxygen contamination <12 ppb. Discussion is presentedregarding the implications of dissolved oxygen contamination on the interpretation of themechanism of carbon dioxide corrosion.