COLORGALV® is a patented factory-applied architectural color finish for painting hot dip galvanized steel

A Patented Process For Painting Galvanized Steel
In the mid 1960's, Duncan Galvanizing recognized the architectural possibilities that painting galvanized steel could bring to the building community. We carefully researched, tested and then patented the Colorgalv process under US Patent No. 5641543. The result? We became the first galvanizer in North America to successfully paint hot dip galvanizing.

Colorgalv Is A Complete Process
All work is done in a state-of-the-art coating facility in a fully controlled environment. Nothing is left to chance! And because Colorgalv is a factory-applied metal coating system, you can colorizing your steel year round regardless of weather conditions.

Steel Corrosion Protection In Your Choice Of Colors
With Duncan Colorgalv, your steel corrosion protection color range is virtually unlimited. Download our pdf color chart to see our extensive color selection. 

A Warranteed Metal Finishing System
Available in any color and warranteed for twenty years against rust, Colorgalv provides the architectural and engineering community with a long lasting metal finishing system that blends protective coatings with the aesthetics of architectural finishes.

Experience You Can Count On
With over 40 years of experience in painting galvanizing steel, you can have peace of mind knowing that a company in business since 1890 will be standing behind our work to ensure the longevity of your installation.

Put COLORGALV To Work For You
Call Duncan Galvanizing at 1-800-638-1011 and incorporate this patented galvanized steel painting process into your project specs.

Need a specification? See below or click here to download in MS Word format.

Other specification download available: Colorgalv 10.

Colorgalv Specification

Click here to download in MS Word format.

1. Hot-Dip Galvanizing: For steel exposed to the elements, weather or corrosive environments and other steel indicated to be galvanized, provide coating for iron and steel fabrications applied by the hot-dip process.
   1. Basis-of-Design: Duragalv by Duncan Galvanizing.
   2. Comply with ASTM A 123 for fabricated products and ASTM A 153 for hardware.
   3. Provide thickness of galvanizing specified in referenced standards.
   4. Galvanizing bath shall contain special high grade zinc and other earthly materials.
   5. Fill vent holes after galvanizing, if applicable, and grind smooth.
2. Factory-Applied Architectural Finish Over Galvanized Steel: Provide factory-applied architectural coating over hot-dip galvanized steel matching approved samples.
   1. Basis-of-Design: Colorgalv by Duncan Galvanizing.
   2. Primer coat shall be factory-applied polyamide epoxy primer. Apply primer within 12 hours after galvanizing at the same galvanizer’s plant in a controlled environment meeting applicable environmental regulations and as recommended by the primer coating manufacturer.
   3. Finish coat shall be factory-applied color-pigmented architectural finish. Apply finish coating at the galvanizer’s plant, in a controlled environment meeting applicable environmental regulations and as recommended by the finish coating manufacturer. Finish coat shall exhibit a rugosity (smoothness) not greater than 4 rug (16-20 microns of variation) when measured by a profilometer over a 1 inch straight line on the surface of architectural and structural elements that are less than 24 pounds per running foot. Profilometer shall be capable of operating in 1 micron increments.
   4. Coatings shall be certified OTC/VOC compliant and conform to applicable regulations and EPA standards.
   5. Apply the galvanizing, primer, and coating within the same facility and provide single-source responsibility for galvanizing, priming and finish coating.
   6. Clean galvanized surface to create an acceptable profile for coatings. Galvanizer shall certify that performance will be met without blast cleaning and coating will be applied within 12 hours of galvanizing at the galvanizer’s plant. If blasted, galvanizer shall certify that rugosity standards are met.
   7. Primer shall meet or exceed the following performance criteria:
      1. Abrasion Resistance per ASTM D 4060, CS17 Wheel, 1,000 Cycles 1kg Load: 87.1 mg loss.
      2. Adhesion per ASTM D4541: 1050 psi.
      3. Corrosion Weathering per ASTM D5894, 13 Cycles, 4,368 Hours: Rating 10 per ASTM D714 for blistering; Rating 7 per ASTM D610 for rusting.
      4. Direct Impact Resistance per ASTM D2794: 160 in. lbs.
      5. Flexibility per ASTM D522, 180º Bend, 1 in. Mandrel: Passes.
      6. Pencil Hardness per ASTM D3363: 3B.
      7. Moisture Condensation Resistance per ASTM D4585, 100º F, 2000 Hours: Passes, no cracking or delamination.
      8. Dry Heat Resistance per ASTM D2485: 250º F.
   8. Topcoat shall meet or exceed the following performance criteria:
      1. Abrasion Resistance per ASTM D 4060, CS17 Wheel, 1,000 Cycles 1kg Load: 87.1 mg loss.
      2. Adhesion per ASTM D 4541: 1050 psi.
      3. Adhesion per ASTM D 4541: 1050 psi.
      4. Indirect Impact Resistance per ASTM D2794: 12-14 in. pounds.
      5. Dry Heat Resistance per ASTM D2485: 200° F.
      6. Salt Fog Resistance per ASTM B 117 9,000 Hours: Rating 10 per ASTM D714 for blistering.
      7. Flexibility per ASTM D522, 180° Bend, 1/8 in. Mandrel: Passes.
      8. Pencil Hardness per ASTM D3363: 2H.
      9. Moisture Condensation Resistance per ASTM D4585, 100° F, 1000 Hours: No blistering or delamination Xenon Arc Test per ASTM D 4798: Pass 300 hours

Colorgalv™ is a registered trademark of Duncan Galvanizing.