Catalog Record

Report from S&T Project Number 1884: Field Validation of Impedance Spectroscopy Coating Assessments

Determining the remaining service life of coatings on Reclamation structures improves maintenance timing and lowers overall costs. Traditional visual condition assessments quantify coating areas with visible damage but do not evaluate the coating performance. Electrochemical impedance spectroscopy (EIS) measures the coating performance where there is no visible coating damage. This research applied field demonstrations and laboratory experiments to expand on previous work and advance the validity and usefulness of field EIS testing. The research concluded that the distance between test cells has no effect on the results, reported accuracy and impedance upper limits for field potentiostats, drafted an approach for extrapolating long-term laboratory EIS data to aid estimate remaining service life for EIS data from coated structures, and contributed to a draft ASTM International test method. Field demonstration occurred at Green Mountain Powerplant, Salt River Siphon, Agua Fria River Siphon, and Fontana Dam.
Generation Effort S&T Project Number 1884: Field Validation of Impedance Spectroscopy Coating Assessments
Themes Infrastructure and Assets
Tags Electrochemical Impedance Spectroscopy (EIS), Field Electrochemical Impedance Spectroscopy (EIS) Testing, Impedance Testing, Maintenance Planning, Coating Service Life
Reclamation Project
Reclamation Program Science and Technology Program

Location Information

Location Description The Bureau of Reclamation’s Technical Service Center (TSC) provides innovative solutions to water and power resource issues. The TSC consists of approximately 565 scientists, engineers, and other professional and office staff, and operates a world-class materials and hydraulic engineering laboratory. TSC's mission is to be Reclamation’s preferred provider of science and engineering services, and to be the preferred employer of engineers and scientists in the U.S. TSC values are founded on personal and professional integrity. The TSC is located at the Denver Federal Center, 6th and Kipling, Building 67, Denver, Colorado 80225-0007.
Location Tags Denver Federal Center
Location Parent
State(s) Colorado
Unified Region(s) Upper Colorado Basin
Timezone MT
Elevation 5,619 ft
Vertical Datum NAVD88
Coordinates (lat, long) See Location Details
Horizontal Datum WGS84