A modified version of the slope parameter equation for pipelines that incorporates metallic path resistance is presented. Solutions to this expression are compared to ones based upon a first principles based potential attenuation equation. Agreement between the far field potential projected by each was found to be good for anode spacings less than 10,000 m, but the modified slope parameter equation produced conservative far-field potentials for anode spacing less than 20,000 m.

Subject
Galvanic anodes, Piping, Anode potential, Slopes, Pipelines, Electrolyte resistance, Impressed current anodes, Anode resistance, Bracelet anodes, Polarization, Polarization resistance, Corrosion potential, Anodes
Keywords:
Pipelines, cathodic protection, potential attenuation, slope parameter, design
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2003
Association for Materials Protection and Performance (AMPP)
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