The cause of the high corrosion losses below the low tide level on older steel piling (usually called Accelerated Low Water Corrosion - ALWC) is incompletely understood but usually linked to microbiological influences. Vertical 3-6 m long steel strips were exposed through the tidal zone at 13 different marine sites. Corrosion of steel below low tide is influenced by nutrient concentration. After only 1-3 years good correlation was found between ALWC and local seawater average concentration of dissolved inorganic nitrogen, a necessary nutrient for microbiological activity. Good correlation exists between severity of corrosion and nutrient concentration. These results allow prediction of the likelihood of long-term ALWC through measurement of either short-term corrosion loss profiles or average nutrient levels.


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    Title :

    Corrosion of long vertical steel strips in the marine tidal zone and implications for ALWC


    Additional title:

    Korrosion von langen vertikalen Streifen in der Meeres-Gezeitenzone und Schlussfolgerungen für die beschleunigte Niedrigwasserkorrosion (ALWC)


    Contributors:

    Published in:

    Corrosion Science ; 65 ; 26-36


    Publication date :

    2012


    Size :

    11 Seiten, 12 Bilder, 3 Tabellen, 35 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English