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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