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Assessment of MIC in carbon steel water injection pipelines
RISE, Swerea, Swerea KIMAB.
RISE, Swerea, Swerea KIMAB.
2012 (English)In: Society of Petroleum Engineers - SPE International Conference and Exhibition on Oilfield Corrosion 2012, 2012, 227-234 p.Conference paper, Published paper (Refereed)
Abstract [en]

The present study compares corrosion mass loss and pit depth measurements on carbon steel corrosion coupons exposed under similar operating parameters, but with different biological consortia. One set of data were obtained from standard flush disc corrosion coupons used to monitor corrosion rates in a water injection pipeline on the North Sea continental shelf. The coupons were exposed on average for 6 months over 6 years operational time. These data are compared with published corrosion data of coupons exposed in abiotic district hot water systems from several power plants situated in Europe. The exposure time for these coupons was 9 months. Both systems were anoxic and in the same temperature range and are comparable. Observations regarding relationship between MIC and bacterial consortia, bacterial numbers and type, water quality and corrosion products are also made. The corrosion rate of the water injection pipeline is approximately 10 times higher compared with the corrosion rate in the abiotic district hot water system. It is concluded that the increased corrosion on the carbon steel coupons in the early stage is caused by MIC. This is also supported by the chemical and biological information available for the pipelines. The results reported here constitute the first step of an overall study to improve the level of understanding of the bacterial contribution to the total corrosion rates of carbon steel in water injection flowlines. Such understanding is expected to improve management and operational decision-making for practical control of corrosion in the field, by providing predictions of expected life time as a function of control of biotic consortia (e.g. through pigging, and biocide treatments). Further, it will facilitate decisions concerning choice of pipeline construction materials for future design. Copyright 2012, Society of Petroleum Engineers.

Place, publisher, year, edition, pages
2012. 227-234 p.
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-12945ISBN: 9781622760800 (print)OAI: oai:DiVA.org:ri-12945DiVA: diva2:973138
Conference
SPE International Conference and Exhibition on Oilfield Corrosion 2012, Aberdeen, 28 May 2012 through 29 May 2012, 92248
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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Materials Engineering

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