Logo Normandie Logo Europe Logo de La Manche

Microbiologically-enhanced galvanic corrosion of the steel beneath a deposit in simulated oilfield-produced water containing Desulfotomaculum nigrificans

Résumé : In this work, microbiologically-enhanced galvanic corrosion between the carbon steel beneath a deposit and bare steel was investigated in simulated oilfield-produced water containing sulfate-reducing bacteria (SRB), in this case Desulfotomaculum nigrificans. The results show that the SRB enhance the generation of a galvanic coupling effect between bare steel and the steel under the deposit, due to their different electrochemical potentials, resulting in accelerated corrosion of the steel under the deposit. In this galvanic couple the bare steel serves as the cathode and the steel under the deposit as the anode. As time increases, the bare steel also suffers from SRB-induced microbiologically influenced corrosion. The galvanic effect is reduced after a long period of incubation due to decreasing SRB activity. Moreover, in the presence of SRB the localized corrosion initiated on the steel under the deposit is greater than that occurring on bare steel.
Domaine de référence : Biocorrosion
Auteur Liu Hongwei, Zhong Xiankang, Liu Hongfang, Frank Cheng Y.
Année de parution : 2018.
Mots-clés : Galvanic corrosion, Microbiologically influenced corrosion, Sulfate-reducing bacteria, Under deposit corrosion.
Type de document : Article de revue.
Exporter la référence : BibTeX | Zotero RDF | RIS (EndNote)

Ce projet est financé par le Fonds Européen de Développement Régional, la Région Normandie et le Conseil Départemental de la Manche.