Understanding and Mitigating the Threat of AC Induced Corrosion on Buried Pipelines

The University of Akron is exploring new methods for assessing the threat of AC corrosion on buried pipelines. The results are anticipated to improve indirect inspection methods for assessing the impact of induced AC currents on pipeline corrosion rates and could be used for national and international standards. The project has three thrust areas to accomplish for successful completion. They are: laboratory studies, industrial test facility benchmarking and in-service pipeline validation. Previous work in the lab has shown that the magnitude of interfacial capacitance of the corroding metal is a key parameter in determining AC corrosion rate. As such the University and students will investigate the interfacial capacitance that develops on pipeline steel as a function of corrosion product build-up (scaling) and soil properties such as mineral content and pH. In addition, the university and students will conduct exploratory studies to determine the susceptibility of pipeline steel to environmental fracture during exposure to AC. Results from these tests will be benchmarked in experiments conducted in industrial pipeline testing facilities at Mears Integrity and Marathon Petroleum. Finally, the research team will validate the project by collecting indirect inspection data on an in service pipeline in a transmission line right-of-way owned by Marathon. The data will be used as input to an AC Risk Algorithm to prioritize direct inspection of the pipeline. Potentially, the section of the pipeline identified as being at the greatest risk will be assessed using direct inspection.


  • English


  • Status: Active
  • Funding: $240221
  • Contract Numbers:


  • Sponsor Organizations:

    Pipeline and Hazardous Materials Safety Administration

  • Managing Organizations:

    Pipeline and Hazardous Materials Safety Administration

    Washington, DC  United States  20590
  • Project Managers:

    Mataich, Joseph

  • Performing Organizations:

    The University of Akron

  • Principal Investigators:

    Lillard, Robert

  • Start Date: 20150930
  • Expected Completion Date: 20180929
  • Actual Completion Date: 0
  • USDOT Program: Pipeline Safety Research

Subject/Index Terms

Filing Info

  • Accession Number: 01681631
  • Record Type: Research project
  • Source Agency: Department of Transportation
  • Contract Numbers: DTPH5615HCAP02
  • Files: RIP, USDOT
  • Created Date: Sep 21 2018 6:24PM