Droplet digital PCR revealed antibiotic resistance genes, metal and intI1 across all pipe biofilm sample types (biomass surfaces, corrosion tubercles, under tubercles).

This paper presents the application of metabolomic techniques to determine the presence of microbial influenced corrosion (MIC). In a previous study, the extracellular metabolites expressed from pipe biofilm was identified by analysing the passing water. This investigation extends this work by successfully applying a chemometric statistical analysis to the extracellular metabolomic profile of a...

Gas, oil and other pipelines need to be inspected for corrosion and other defects at regular intervals. For this application Pipetronix GmbH (PTX) Karlsruhe has developed a special ultrasonic based probe. Based on the recorded wall thicknesses of this so called pipe pig the Research center for computer science (FZI) has developed in cooperation with PTX an automatic inspection system called Neu...

Oil and gas pipelines are pressure vessels with steel walls operating at up to 70% of their yield strength. They need to be inspected rigorously to avoid failure and for environmental safety reasons. Magnetic flux leakage (MFL) is the most cost effective technique for in-service corrosion inspection ofburied gas pipelines [1]. In this method, the pipe wall is magnetized to near-saturation using...

Rectangular reinforced concrete pipes are widely used in various municipal projects. Because they often located weak strata urban areas, prone to structural defects such as corrosion, which turn leads a decline the bearing capacity of and, severe cases, causes disasters pipe collapse. In this paper, mechanical properties rectangular with corrosion studied through laboratory tests, and influence...

Immersion-type AE sensor is needed for corrosion monitoring of underground gasoline tanks. We are developing a multi-directional optical fiber AE sensor to monitor the longitudinal AE signal through liquid (liquid-borne AE). The developed AE system is an optical-fiber-based Mach-Zender-type laser interferometer using a weak laser and is intrinsically safe. Multi-sensing function was facilitated...

Microbially-induced concrete corrosion in headspaces threatens wastewater infrastructure worldwide. Models for predicting corrosion rates in sewer pipe networks rely largely on information from culture-based investigations. In this study, the succession of microbes associated with corroding concrete was characterized over a one-year monitoring campaign using rRNA sequence-based phylogenetic met...