Corrosion of steel by alternating current (AC) has been investigated since the turn of the century. Studies in the 1950s and 1960s indicated that AC corrosion of steel was only 1 to 2% of an equivalent amount of harmful direct current (DC) corrosion, and was controlled to negligible levels when cathodic protection (CP) was applied to industry standards. A 1986 investigation of a corrosion failure on a high-pressure, well-protected gas pipeline in Germany indicated that the sole cause was AC corrosion. Studies found that above a certain minimum AC current density, normal levels of CP will not control AC corrosion to acceptable levels. AC mitigation often is required to prevent serious corrosion.


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    Titel :

    AC corrosion - a challenge to pipeline integrity


    Beteiligte:
    Gummow, R.A. (Autor:in) / Wakelin, R.G. (Autor:in) / Segall, S.M. (Autor:in)

    Erschienen in:

    Materials Performance ; 38 , 2 ; 24-31


    Erscheinungsdatum :

    1999


    Format / Umfang :

    8 Seiten, 26 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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