Morphology of localised corrosion attacks in sour environments
Kvarekvål, J.
Corrosion 2007, Nashville, 2007-03-11-03-15. Paper 07659
- Publ. year
- 2007
- Publ. type
- paper
- Abstract
- The number of sour oil and gas fields worldwide is increasing, as sweet fields are being depleted and high oil prices vouch for profitable development of sour oil and gas finds. Sour oil and gas production and transport always imply a risk of material damage and shutdowns due to CO2/H2S corrosion, and especially localised corrosion attacks. The mechanisms behind localised CO2/H2S corrosion are not fully explained, with unanswered questions regarding the effect of FeS corrosion film breakdown, contribution of galvanic effects from electronically conductive FeS films to the pit growth, and the effect of steel microstructure on localised corrosion. This paper provides a discussion on the mechanisms of different types of localized H2S/CO2 corrosion attacks, based on observations from laboratory experiments and from the field. ©NACE International. All rights reserved. Paper reproduced with permission from CORROSION/2007 Annual Conference and Exhibition, Nashville, Tennessee. <A HREF="http://www.nace.org" target=_blank>www.nace.org</A>
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