Advanced science.  Applied technology.


Local Electrochemical Impedance Spectroscopy (Leis) for detecting coating defects in Buried Pipelines: 8,310,243


A system and associated methods for acquiring and analyzing LEIS data from a buried structure, such as a pipeline. A special probe having adjustable electrodes is placed in the soil above the structure. A voltage is applied to the structure, causing more current to emanate from a coating defect than from intact coating. The probe electrodes acquire a response signal, which is analyzed to detect the defect.

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Pavan K. Shukla; Todd S. Mintz; Biswajit Dasgupta; Jay L. Fisher; Osvaldo Pensado-Rodriguez