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Corrosion of low carbon steel by microorganisms from the ‘pigging’ operation debris in water injection pipelines

Cote Coy, Claudia and Rosas, Omar and Sztyler, Magdalena and Doma, Jemimah and Beech, Iwona and Basséguy, Régine Corrosion of low carbon steel by microorganisms from the ‘pigging’ operation debris in water injection pipelines. (2014) Bioelectrochemistry, 97. 97-109. ISSN 1567-5394

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Official URL: https://doi.org/10.1016/j.bioelechem.2013.11.001

Abstract

Present in all environments, microorganisms develop biofilms adjacent to the metallic structures creating corrosion conditions which may cause production failures that are of great economic impact to the industry. The most common practice in the oil and gas industry to annihilate these biofilms is the mechanical cleaning known as “pigging”. In the present work, microorganisms from the “pigging” operation debris are tested biologically and electrochemically to analyse their effect on the corrosion of carbon steel. Results in the presence of bacteria display the formation of black corrosion products allegedly FeS and a sudden increase (more than 400 mV) of the corrosion potential of electrode immersed in artificial seawater or in field water (produced water mixed with aquifer seawater). Impedance tests provided information about the mechanisms of the interface carbon steel/bacteria depending on the medium used: mass transfer limitation in artificial seawater was observed whereas that in field water was only charge transfer phenomenon. Denaturing Gradient Gel Electrophoresis (DGGE) results proved that bacterial diversity decreased when cultivating the debris in the media used and suggested that the bacteria involved in the whole set of results are mainly sulphate reducing bacteria (SRB) and some other bacteria that make part of the taxonomic order Clostridiales.

Item Type:Article
HAL Id:hal-01878770
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > University of Portsmouth - UP (UNITED KINGDOM)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Funders:
European Community's
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Deposited By: Loetitia MOYA
Deposited On:21 Sep 2018 12:15

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