Maintenance Painting for Steel Bridges: Evaluation of Coating Systems Over Minimally Prepared Surfaces to Delay Rehabilitation Status: CompleteReport Date: 09/16/2019 Summary: Researchers examined five maintenance paint coating systems recommended for steel bridges showing localized corrosion. Systems were applied with minimal surface preparation and evaluated for three years after application. The coatings performed well. If corrosion is identified early and maintenance painting is performed, the service life of the paint coating system will be extended five years before repainting is required. Recommendations developed for MnDOT's Bridge Maintenance Painting Manual included timing of maintenance painting based on paint coating condition ratings. Final Deliverables: Report #2019-37 Technical Summary Related Materials: Detecting Corrosion Early Extends Service Life of Bridge Paint Coating - (Blog Post) Bridge Coating Repair Reference Table - (Spreadsheet Tool) Related Research:
