Ultrasonic Mitigation of Microbiologically Influenced Corrosion

Autor:	P. Schattner, Y. Gorfu, B. G. Pound, Kristien Mortelmans
Rok vydání:	2005
Předmět:	chemistry.chemical_classification Biocide Kerosene Chromatography Materials science biology General Chemical Engineering Sonication Metallurgy General Chemistry biology.organism_classification Enterobacter aerogenes Corrosion Hydrocarbon chemistry Brining General Materials Science Bacteria
Zdroj:	CORROSION. 61:452-463
ISSN:	1938-159X 0010-9312
DOI:	10.5006/1.3280645
Popis:	Power ultrasound was investigated as an environmentally benign technique for the mitigation of microbiologically influenced corrosion (MIC) in natural gas pipeline facilities. Bacterial kill tests were performed with simulated pipeline brine containing acid-producing bacteria, Enterobacter aerogenes. The effect of sonication on the concentration of viable bacteria was determined for different pulse duty cycles, flow rates, hydrocarbon (kerosene) contents, applied pressures, and sublethal doses of a biocide (gluteraldehyde). With a fresh sonicator horn-tip, the bacterial concentration in brine containing 20 vol% kerosene can be reduced by about three orders of magnitude for a double pass of the brine through a 550-W sonicator at a flow rate of 4.8 L/h. The combination of ultrasound and 5 ppm gluteraldehyde (OHC[CH2]3CHO) decreased the bacterial concentration to undetectable levels within 4 h after sonication. The polarization resistance of API 5L Grade X-52 pipeline steel was measured in recircula...
Databáze:	OpenAIRE
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