Minnesota Department of Transportation

511 Travel Info

Research & Innovation

Project Search

Return to Main Site

Maintenance Painting for Steel Bridges: Evaluation of Coating Systems Over Minimally Prepared Surfaces to Delay Rehabilitation

Status:  Complete
Report Date:  09/16/2019


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:

Related Materials:

Related Research: