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An overview of recent progresses in monitoring and understanding localized corrosion on buried steel pipelines

conference contribution
posted on 2020-01-01, 00:00 authored by Mike Yongjun TanMike Yongjun Tan, Ying HuoYing Huo, Bob VarelaBob Varela, Ke Wang, Indivarie Ubhayaratne
Soil is a complex environment where various forms of localized corrosion could occur on buried metal structures such as pipelines. Protective coatings and cathodic protection (CP) are widely applied as principal means of protecting buried steel pipeline from soil corrosion, unfortunately coating defects and disbondment could create some complex environmental conditions for localized corrosion to initiate and propagate. Stray currents could also cause dynamic and rapid localized corrosion on buried pipelines. This paper summarizes typical results and first-hand experiences from recent work aimed at developing corrosion probes based on an electrochemically integrated multi-electrode arrays for monitoring and understanding complex forms of localized corrosion on buried pipelines. Experimental and field testing results have demonstrated the capability of the probes to be used in laboratory research and field conditions. Evidence found on localized corrosion under disbonded coatings and stray currents illustrate some of the unique advantages of the electrode array method for visualizing and understanding localized corrosion of buried steels. It also briefly discusses needs for future work to enhance the reliability of corrosion probes as a structural health monitoring tool for early detection and diagnosis of corrosion, for providing industrial system ‘health’ alarm, for forecasting maintenance requirements, and for generating data for integrated and automated corrosion management systems.



Corrosion. Conference & Expo (2020 : Houston, Texas)




NACE International


Houston, Texas

Place of publication

Houston, Tex.

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Due to circumstances arising from the ongoing spread of COVID-19 and the continuing danger it poses to public health and safety, the NACE International Board of Directors regrets to announce that CORROSION 2020, NACE's Annual Conference & Expo will not take place in Houston this June 14-18.

Publication classification

E1 Full written paper - refereed

Copyright notice

2020, NACE International

Title of proceedings

Proceedings of the 2020 Conference & Expo on Corrosion

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