Souring and microbiologically influenced corrosion (MIC) caused by sulfate-reducing bacteria (SRB) are major problems in the oil and gas industry as well as other industries such as water utilities. SRB biofilms are notoriously difficult to treat. More effective dosing of biocides is desired to deal with increasing environmental restrictions and costs. This work presents an effective green biocide system consisting of glutaraldehyde (C5H8O2), ethylene diamine disuccinate (EDDS [C10H16N2O8]), and methanol (CH4O) against souring and MIC caused by SRB. Desulfovibrio vulgaris (ATCC 7757) was used in this work in the full strength ATCC 1249 medium and a modified ATCC 1249 medium with only four ingredients (MgSO4, lactate [C3H5O3−], yeast extract, and Fe2+) at concentrations 1/4 of those in the full medium. Tests were carried out in 125 mL anaerobic vials. It was found that the triple combination of 30 ppm (w/w) glutaraldehyde, 1,000 ppm EDDS, and 10% (v/v) methanol was considerably more effective than glutaraldehyde alone and the combination of glutaraldehyde and EDDS in the inhibition of souring, SRB biofilm establishment, and MIC pitting of C1018 carbon steel (UNS G10180) in the presence of 2% (w/w) sand particles in batch tests.
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1 November 2012
Research Article|
July 11 2012
Biocide Cocktail Consisting of Glutaraldehyde, Ethylene Diamine Disuccinate (EDDS), and Methanol for the Mitigation of Souring and Biocorrosion
CORROSION (2012) 68 (11): 994–1002.
Article history
Received:
December 08 2011
Revision Received:
March 30 2012
Accepted:
March 30 2012
Citation
D. Xu, J. Wen, T. Gu, I. Raad; Biocide Cocktail Consisting of Glutaraldehyde, Ethylene Diamine Disuccinate (EDDS), and Methanol for the Mitigation of Souring and Biocorrosion. CORROSION 1 November 2012; 68 (11): 994–1002. doi: https://doi.org/10.5006/0605
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