Two remote monitoring & control units (RMCU) and four remote monitoring units (RMU) were installed at the cathodic protection systems on Selden Lock & Dam. Water quality parameters recorded upstream from Selden Lock & Dam were correlated to different remote monitoring unit parameters. For RMUs, coupon AC current density, coupon DC current density, structure AC potential, structure DC potential, and coupon DC instant off measurements were compared to temperature, specific conductance, total dissolved solids, pH, and dissolved oxygen. For RMCUs, rectifier downstream current, rectifier downstream voltage, rectifier upstream current, and rectifier upstream voltage was compared to temperature, specific conductance, total dissolved solids, pH, and dissolved oxygen. Linear regressions for each remote monitoring unit parameter and water quality parameter were created. Rectifier upstream current and Rectifier Upstream voltage had the most correlations with water quality data. Changes in pool level could explain the differences in upstream rectifier correlations and downstream rectifier correlations.

Subject
Electric current, Voltage, Correlation, Deviation, Dissolved solids, Linear regression, Rectifiers, Current densities, Water quality, Dissolved oxygen, Remote monitoring, Corrosion coupons, Conductivity
Keywords:
remote monitoring, cathodic protection, water quality
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2023
GOV
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