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An overview of some of recent progresses in monitoring corrosion using probes/sensors as a practical means of acquiring in-situ and site-specific data from ‘invisible’ underground structures such as oil & gas pipelines
Monitoring corrosion and materials degradation using probes/sensors is a practical means of acquiring in-situ and site-specific data from ‘invisible’ underground structures such as oil & gas pipelines for the early warning of structural failure and the prediction of asset life. A difficulty in corrosion monitoring is the design of suitable corrosion probes for acquiring localized corrosion and materials degradation data from complex buried pipeline conditions. This paper provides an overview of some of recent progresses in this area and a brief discussion on future prospects. Several cases are presented to illustrate our approaches to monitoring and visualizing localized corrosion of buried steel under the effect of dynamic anodic transients; coating disbondment under overprotection potential; and localized corrosion under a simulated pipeline coating.
Keywords: pipeline corrosion, corrosion monitoring, corrosion data, localized corrosion, coating degradation, corrosion probes.
Corrosion monitoring technology selection should be based on the challenges and information needs in each individual case. A combination of monitoring technologies will often provide the most reliable information, leading to improved decisions and better corrosion management.
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The authors will demonstrate that deploying only a modest number of point measurement devices in an area of elevated localized corrosion risk will provide the best possible combination of probability of detection (POD) as well as ongoing wall thickness monitoring for localized corrosion attack.
The paper discusses “past” developments, “present” status, and “future” advancements of inspection, monitoring, and modelling technologies.