Abstract
The nuts of galvanized fasteners used on bridges are coated with a wax-based lubricant that contains a dye. Once installed, the fasteners are cleaned to remove the wax prior to painting. Cleaning is typically accomplished using a combination of solvents and hand tools, but questions are often raised as to how much residual dye on the surface is acceptable for painting. To gain better insight into this issue, the Florida Department of Transportation (FDOT) commissioned a research project to evaluate the performance of a bridge paint system applied to mechanically galvanized and hot dip galvanized fasteners after removal of various amounts of lubricant. This paper summarizes the research that was undertaken and the results.
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2017
Association for Materials Protection and Performance (AMPP)
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