Catalog Record

Data and Report from S&T Project 19168: Evaluation of Corrosion Inhibitive Coatings

Coating systems currently specified for use to protect Reclamation’s aging infrastructure are expected to only provide 20-30 years of service before needing replacement. Legacy coating systems like lead-based alkyds, a type of coating called inhibitor coatings, exhibit service lives upwards of 80 years. Unlike barrier coatings that passively act as an obstacle to block the electrolyte from reaching the metal substrate and causing corrosion, inhibitive coatings actively prevent corrosion by stunting or polarizing the reaction. This work comprehensively studied modern inhibitive coating systems through electrochemical impedance spectroscopy (EIS) and rust creep evaluation to understand the resulting barrier properties when subject to accelerated weathering. Adhesion strength, impact resistance, and cathodic disbondment were also evaluated with the overall goal of identifying an inhibitive system that may withstand Reclamation’s severe service environments and outperform commonly used barrier coatings. One system containing metallic zinc inhibitors did perform as well as the benchmark, but long-term testing is still needed to better evaluate performance.
Generation Effort S&T Project 19168: Evaluation of Corrosion Inhibitive Coatings
Themes Infrastructure and Assets, Hydropower
Tags Coating Service Life, Protective Coatings, Corrosion Protection
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