Catalog Record

Report from S&T Project 19122: Test Method Development for Adhesion Strength of Protective Coatings under Real-Life Hydraulic Conditions

Recent field experience with modern protective coating systems has shown that traditional test methods for coating adhesion do not provide reliable results. In the current study, efforts were made to develop a test method for coating adhesion strength that simulates hydraulic conditions present in the field to improve correlation between laboratory results and field experience. The method combines laboratory measurements and boundary layer theory to directly compare hydraulic parameters from the laboratory and field. To date the test method, which exposes coating test samples to hydraulic uplift forces that cause coating delamination, used polyurethane coating test samples to directly compare laboratory and field results as well as other trial coating systems. Laboratory results showed greater uplift forces required to delaminate coatings compared to those predicted from failures in the field. More detailed analyses of field case studies as well as refinements to the laboratory test method will help improve.
Generation Effort S&T Project 19122: Test Method Development for Adhesion Strength of Protective Coatings under Real-Life Hydraulic Conditions
Themes Infrastructure and Assets, Hydropower
Tags Adhesion, Coatings, Delamination, Failure, Penstock, Stagnation Pressure, Uplift
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