STRUCTURAL STEEL COATINGS AND PRETREATMENTS FOR USE IN LIEU OF BLAST CLEANING. FINAL REPORT

A total of 41 specialty coatings designed for application to rusted, hand-cleaned steel surfaces were evaluated. Coatings were classified according to type of vehicle or mode of action into seven categories. Those categories were pretreatments, rust converters, surface-tolerant latex paints, nonhardening waxy paints, epoxy mastics, urethanes and solvent-borne, air-drying types. Testing was primarily restricted to coatings having low volatile organic compound (VOC) content. Low VOC coatings were materials containing no more than 250 to 275 grams of VOC per liter of material as applied excluding water and any solvents determined to be exempt by the California Air Resources Board. Coatings were evaluated through accelerated laboratory tests applied to clean, abrasive-blasted steel panels and to rusted, hand-cleaned steel panels. Most of the paints were also applied to panels which were exposed beneath the Golden Gate Bridge for two years. The best performing coating overall was a solvent-borne, phenolic resin based coating having a high content of tung oil. Rust converter type coatings applied to rusted steel performed the poorest of all coatings evaluated.

• Corporate Authors:

  California Department of Transportation

  Transportation Laboratory
  5900 Folsom Boulevard
  Sacramento, CA  United States  95819

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Rogerson, A
• Publication Date: 1988-6

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: v.p.

Subject/Index Terms

• TRT Terms: Accelerated tests; Cleaning; Coatings; Epoxides; Laboratory tests; Latex; Paint; Performance evaluations; Structural steel; Surface treating; Urethane
• Old TRIS Terms: Epoxy
• Subject Areas: Geotechnology; Highways; Maintenance and Preservation; Materials; I34: Steels and Metals; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00483869
• Record Type: Publication
• Report/Paper Numbers: FHWA/CA/TL-88/04
• Contract Numbers: E84TL17
• Files: TRIS, USDOT, STATEDOT
• Created Date: May 31 1989 12:00AM