STP717

    Polymeric and Composite Materials for Use in Systems Utilizing Hot, Flowing Geothermal Brine III

    Published: Jan 1980


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    Abstract

    This paper documents recent progress in our continuing program aimed at finding optimum polymeric materials for use in geothermal plants. Coatings and bulk specimens of high-performance polymers and composites were exposed to brine in the laboratory and in the field. Several levels of temperature and flow conditions were employed. Physical changes, scaling tendencies, and changes in surface characteristics resulting from exposure were studied by techniques including optical and scanning electron microscopy, energy-dispersive spectroscopy, and contact-angle measurements. Certain fluorocarbon and hydrocarbon polymers continue to respond favorably to the severe geothermal environment. Surface roughness, either present originally or developed during exposure, appears to be an important factor in promoting scaling and scale adhesion.

    Keywords:

    composite materials, brine, polymers, water resistance, thermal resistance, chemical attack, protective coatings, structural plastics, geothermal, chemical-resistant coatings, heat-resistant coatings, corrosion, scale


    Author Information:

    Lorensen, LE
    Chemist, Lawrence Livermore Laboratory, Livermore, Calif.

    Walkup, CM
    Technical specialist, Lawrence Livermore Laboratory, Livermore, Calif.

    Pruneda, CO
    Chemist, Lawrence Livermore Laboratory, Livermore, Calif.


    Paper ID: STP30071S

    Committee/Subcommittee: G01.09

    DOI: 10.1520/STP30071S


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