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Two drilling mud samples, taken at different HDD operations. Results demonstrated the presence of microorganism populations associated with microbiologically influenced corrosion (MIC) at one of the two test locations.
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High throughput corrosion measurement indicates that species type and concentration directly impact MIC rates. A corrosion model to identify a risk index for corrosion is based on amount, type, and proportion of living MIC organisms.
We have developed a quantitative polymerase chain reaction (qPCR) assay to detect and quantify sulfur oxidizing bacteria (SOB) through the amplification of the soxB subunit of the thiosulfate-oxidizing gene complex. SOB populations have been linked to the corrosion of concrete and steel.
This manuscript provides case study data from subsea crude oil pipelines that addresses the questions of how to obtain the best quality samples from pig returns for microbiological testing, and what are the relative merits of different test methodologies.
Sampling of pigging debris was performed from three multiphase pipelines that previously were exposed to microbiologically influenced corrosion (MIC) due to high abundances of sulfate reducing prokaryotes (SRP) and methanogens.
Five case studies of corrosion related failures in alkanolamine acid gas removal systems including the following types of corrosion: Uniform, Pitting, Chloride Induced Crevice, Cavitation, and Microbiologically Induced Corrosion (MIC).
This paper presents new applications of Volatile Corrosion Inhibitors (VCI) inside new and/or existing out-of-service pipelines. The system utilizes a combination of soluble and volatile corrosion inhibitors that are directly applied into the pipeline.
A case study where MIC was recognized as primary cause of failure for an encased ductile iron water pipeline. The cathodically protected pipe was located within the proximity a creek crossing and had suffered from multiple failures.
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This benchmarking study involved both the application of biocides to reduce biofilm formation on clean carbon steel and the application of biocide to established biofilm.
The objective of this paper is to provide a review of various models and methods that have been developed and applied by both researchers and industry professionals to better understand and predict MIC.
A peptide (labeled as “Peptide A”) was used to enhance tetrakis hydroxymethyl phosphonium sulfate biocide to treat the corrosive sulfate reducing bacterium Desulfovibrio vulgaris and a tough field biofilm consortium on C1018 carbon steel coupons.
The 2304 duplex stainless steel is an alternative to 316L SS in marine applications, while its MIC behavior is barely known. Surface analysis and electrochemical techniques were used to study the corrosion behavior of 2304 DSS caused by the marine aerobe Pseudomonas aeruginosa.