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AC Corrosion At Other Frequencies Part A: Field Investigation And Mitigation

Product Number: 51321-16807-SG

Author: Wolfgang Fieltsch, P. Eng.; Fation Shahinas, P. Eng.; Andreas Junker Olesen, Ph.D., Eng.; Lars Vendelbo Nielsen, Ph.D., Eng.

Publication Date: 2021

$20.00

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AC Corrosion at Other Frequencies Part B: Laboratory Investigations

Product Number: 51321-16300-SG

Author: Andreas Junker Olesen/Lars Vendelbo Nielsen/Wolfgang Fieltsch/Fation Shahinas

Publication Date: 2021

$20.00

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Innovative Mitigation Strategies to Address Ac Corrosion At Higher Frequencies

Product Number: 51323-19280-SG

Author: Wolfgang Fieltsch, J. Scott Farquharson

Publication Date: 2023

$20.00

A corrosion investigation performed in 2018 on an NPS 6, approximately 4 km long, polyethylene coated pipeline determined that the accelerated corrosion anomalies detected during in-line inspections (ILI) were due to AC corrosion. The AC and DC current densities on the AC coupons adjacent to these anomalies were above the limits recommended in NACE SP21424. It was also determined that the line was cathodically over-protected, and that most of the AC voltage measured on the line was due to 120 Hz AC ripple from a foreign rectifier.

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Products tagged with 'ac frequency'

AC Corrosion At Other Frequencies Part A: Field Investigation And Mitigation

AC Corrosion at Other Frequencies Part B: Laboratory Investigations

Innovative Mitigation Strategies to Address Ac Corrosion At Higher Frequencies

Association for Materials Protection and Performance