... the overall corrosion management of a pipeline. The use of electrical resistance probes and corrosion coupons in pipelines has supported this approach as part of the overall strategy in corrosion management. In this case, probes and coupon data assessment indicated the presence of deposits, which led toward...

... on measured dynamic fluctuating parameters on buried pipelines interfered by dynamic DC stray current from metro system, the fluctuation characteristics, such as fluctuating period and amplitude were analyzed systemically. Corrosion coupons were buried near the pipelines interfered by dynamic DC stray current...

... in the corrosive environment, maintaining homogenous conditions around complex and thermally massive test specimens, and controlling transitions between wet and dry phases of complex tests. Corrosion Coupon use and Assumptions Tested It is interesting to note that ISO 9227 contains a surface roughness requirement...

... modelling predicts a rate of 270 mpy (6.75 mm/y). The results from both corrosion models predicts that the casing gas should be severely corrosive under these conditions. However, results from corrosion coupon (CC) and probe monitoring in the associated pipelines indicated low to moderate general...

... corrosion and failures after only five years of service. General corrosion rates based on CS corrosion coupons were as high as 8 mm/year (320 mpy). Many of the failures occurred on elbows, tees and reducers. Brackish water from these formations contains CO₂ and bacteria which would be a possible...

.... Probes used at JK part of the pipeline: Feb 2009 – May 2011: 4 Tube probes (3600T4) with alloy carbon steel (span 2) – failed after 4 months in use. Jul 2011 – May 2012 : Cylindrical probe (3500T10) with alloy carbon steel (span 5) – failed after 11 months in use. RESULTS Corrosion coupons...

... in soils. A good estimation of the corrosion rates in soil can only be performed with high-resolution corrosion probes. Corrosion coupons give valuable results on the off-potential and current density. But no direct information about the corrosion rate of the structure can be extracted from off-potential...

... cathodic protection coupon stations. Data evaluation Included, coupons connected to the pipe and cathodic protection system (CP coupon), free corroding coupons (corrosion coupon), coupon “on” and instant-off potentials, polarization potentials, soil resistivity and temperature effects, and surface vs close...

..., the methods used to analyze the coupons for pitting corrosion and the relationships developed to project the results to a pipeline and in time will be presented. Pipeline The experiments with corrosion coupons were conducted in a pipeline right-of-way containing four pipelines ranging in size from 30 inches...