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    Concepts of Underground Corrosion

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    Corrosion in soil is a complex phenomenon, but there are some basic concepts that are useful in understanding the process. Underground corrosion is electrochemical in character, and this fact is used to describe the corrosion process in terms of an ordinary dry cell. The differences between corrosion in disturbed and undisturbed soil are discussed, and data are presented to emphasize these differences.

    The results reveal that soil composition is less important than soil resistivity, but both are subordinate in importance to oxygen availability. Thus, corrosion is negligible in undisturbed soils where oxygen concentration is low.


    corrosion in soil, corrosion of steel, disturbed soil, underground corrosion, undisturbed soil

    Author Information:

    Escalante, E
    Metallurgist, Corrosion Group, National Bureau of Standards, Gaithersburg, MD

    Committee/Subcommittee: G01.10

    DOI: 10.1520/STP19710S