AC and DC Interference: Stray Current Corrosion

  • Author: Technical
  • Level: Advanced
  • Study time: 1 hour
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Course overview
What are DC stray currents and how do they affect pipelines? How can you differentiate between stray currents and galvanic currents in pipelines? What are the typical sources of DC stray currents and how do they impact pipeline integrity?

This one-hour self-paced will cover the basics of DC stray currents. This includes pick-up and discharge areas, dynamic and static currents, types of bonds, and the effect of soil resistivity on these circuits.
At the end of this course, students will be able to differentiate between stray and galvanic currents, identify sources of stray currents, identify typical cases of AC Interference and DC interference, and define other topics related to AC and DC interference.
  • Video time: 49 minutes
  • Exams: 1

Joe Pikas

Content SME-V.P. for Pipeline Integrity and Corrosion Engineering Services for Technical Toolboxes
Joe Pikas is a consultant for Technical Toolboxes with more than 50 years of experience in pipeline construction, operations, corrosion control design, and implementation, including pipeline engineering management. He is an expert in pipeline integrity management, risk management, coating materials selection, cathodic protection design, and testing, and internal and external pipeline corrosion control. In 2009, he was awarded the NACE Distinguished Service Award and received an industry award in 2002 from AGA, GTI, INGAA, NACE, OPS, and PRCI International. Also, he has contributed over 50 papers to industry trade magazines, NACE, SSPC, and other publications and conferences.