COLD-WEATHER COATINGS BATTLE WINTER'S CHILL

The North and South Grand Island Bridges, near Niagara Falls, New York, are in the process of receiving much-needed facelifts. The coating system for the North Grand Island Bridge project, the first of the Grand Island bridges to be tackled, features Zinc Clad IV, an organic two-component polyamide epoxy zinc-rich coating. Its low VOC level and wide curing temperature range--40-120 deg F (4-49 deg C) at an 85% relative humidity--combined with 85% (by weight) zinc dust pigment in its dried film, has made Zinc Clad IV ideal for this type of application. In addition, Zinc-Clad IV has exhibited years of proven corrosion resistance on other similar structures. The zinc-based coating was top coated with Macropoxy 920 PrePrime, a low-viscosity penetrating sealer chosen for its ability to penetrate hard-to-reach areas of the structural steel, such as crevices and tight corners. Epoxy Mastic Aluminum II was applied next. This high-build mastic is ideal for added corrosion resistance and provides additional film build. In late October 1997, Polar-Poxy, an epoxy amine adduct mastic coating capable of recoating in 24-36 hours at temperatures as low as 20 deg F (-6.7 deg C), was substituted for the epoxy mastic. The final coat, Corothane II Polyurethane Gloss, is a two-component, VOC-compliant, aliphatic acrylic-modified polyurethane. In addition to color and gloss retention, it also provides exceptional abrasion and salt spray resistance. The project is scheduled to be completed in the summer of 1999.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/11660022
• Corporate Authors:

  Scranton Gillette Communications

  380 E Northwest Highway, Suite 200
  Des Planes, IL  United States  60016-2282
• Publication Date: 1998-4

Language

• English

Media Info

• Features: Photos;
• Pagination: p. 72-74
• Serial:
  • Roads & Bridges
  • Volume: 36
  • Issue Number: 4
  • Publisher: Scranton Gillette Communications
  • ISSN: 8750-9229
  • Serial URL: http://www.roadsbridges.com/rb/

Subject/Index Terms

• TRT Terms: Abrasion resistant coatings; Bridges; Coatings; Cold weather; Corrosion resistance; Low temperature materials; Maintenance; Mastic asphalt; Metal bridges; Polyurethane resins; Sealing compounds; Steel bridges; Zinc coatings
• Uncontrolled Terms: Bridge maintenance; Salt spray
• Geographic Terms: Niagara Falls (New York)
• Old TRIS Terms: Mastics; North grand island bridge
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Maintenance and Preservation; Materials; I35: Miscellaneous Materials; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00750556
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 26 1998 12:00AM