Aesthetic coatings for steel bridge components.

Details

• Creators:
  Ghorbanpoor, Al ; Tabatabai, Habib ; Leppi, Zan
• Corporate Creators:
  University of Wisconsin--Milwaukee. Dept. of Civil Engineering and Mechanics
• Corporate Contributors:
  Wisconsin Highway Research Program ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Bridge members
  • Steel bridges
  • Coatings
  • Aesthetics
  • Performance tests
  • Rust prevention
  • Chlorine
  • Cost effectiveness
• Publication/ Report Number:
  0092-11-07
• Resource Type:
  Tech Report
• Geographical Coverage:
  Wisconsin
• Corporate Publisher:
  Wisconsin. Dept. of Transportation. Library and Research Unit
• Abstract:
  The effectiveness of aesthetic coating systems for steel bridges was studied. Twelve 2-coat, 3-coat, and duplex ; coating systems were selected and subjected to a series of accelerated weathering and mechanical tests to ; determine their performance. The performance evaluation was made by considering gloss and color retention, ; coating discontinuities, rust creepage, and coating adhesion. Surface preparation and coating application ; procedures were given significant consideration. The best color and gloss retention was achieved by the 3-coat ; fluoropolymer systems, but they required higher materials cost. One of the two 2-coat systems performed ; nearly the same as the 3-coat polyurethane coating systems and the other showed a poor performance with ; significant color fading. Duplex polyurethane systems showed comparable performance to that of the 3-coat ; fluoropolymer systems but they performed better than the 3-coat polyurethane systems. This was primarily ; due to the added corrosion protection provided by the hot dip galvanization. It was found that proper adhesion ; in a duplex system can be achieved by following appropriate procedures for galvanization and surface ; preparation. Both duplex powder coated systems tested in this study experienced out-gassing problems during ; the initial application and did not show satisfactory performance.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27265/dot_27265_DS1.pdf
• File Type:
  [PDF - 6.10 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:b968f9179c06d0d9179185d9c4c1e650a3b5d87bdd826b956f04913922ac041c