STP1013

    Environmental Characteristics Controlling the Soil Corrosion of Ferrous Piping

    Published: Jan 1989


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    Abstract

    The characteristics of soils controlling the external corrosion of ferrous piping materials are examined with particular reference to an American Water Works Association (AWWA) rating formula. The relationship and reliability of the following characteristics as corrosion predictors are examined: resistivity, pH, redox potential sulfides, moisture, and chlorides. Metallurgical test results illustrating the mechanism of attack on cast iron and ductile iron are presented and the apparently different performance of the two materials is reviewed. Mitigative and preventive measures are mentioned and the organization of a corrosion control program outlined.

    Keywords:

    underground corrosion, piping materials, parameters, resistivity, pH, redox, moisture, surveys, mitigation


    Author Information:

    Palmer, JD
    President, Corrosion Control Engineering, Ltd., London, Ontario


    Paper ID: STP19706S

    Committee/Subcommittee: G01.10

    DOI: 10.1520/STP19706S


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