Laboratory and field investigation of the effect of the chemical environment on AC corrosion

Andreas Junker, Casey Heinrich, Lars Vendelbo Nielsen, Per Møller

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


AC corrosion is dependent on both AC and DC current densities, but only little is known about the effect of the chemical environment. In this paper, laboratory soil-box experiments are made for a better understanding of the effect of specific chemical constituents in soil on corrosion in relation to the AC and DC current densities.
A field investigation of AC corrosion on an operational pipeline where AC interference and CP levels could be controlled, is presented. Soil analysis from the field study is discussed in relation to the laboratory experiments. Distinction between AC corrosion caused by anodic depolarization of the steel or by excessive cathodic protection and alkalization is made and discussed in relation to the current density criteria in industry standards.
Original languageEnglish
Title of host publicationProceedings of the Corrosion Conference and Expo 2018
Number of pages15
PublisherNACE International
Publication date2018
Article number10844
Publication statusPublished - 2018
EventCorrosion 2018 - Phoenix, United States
Duration: 15 Apr 201819 Apr 2018


ConferenceCorrosion 2018
Country/TerritoryUnited States
City Phoenix
SeriesNACE - International Corrosion Conference Series


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