Duncan Galvanizing

1-800-638-1011

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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. And to protect the hue and brightness of the topcoat color, Colorgalv is available with Duncan's Clearcoat finish.

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.

Colorgalv Short Form Specification

2.XX        HOT-DIP GALVANIZING AND FACTORY-APPLIED ARCHITECTURAL FINISH - COLORGALV®

A.       Hot-Dip Galvanizing:  Provide coating for iron and steel fabrications applied by the hot-dip process, Duragalv^® by Duncan Galvanizing.  Comply with ASTM A 123 for fabricated products and ASTM A 153 for hardware.  Provide thickness of galvanizing specified in referenced standards. The galvanizing bath shall contain special high grade zinc, nickel, and other earthly materials. 

B.       Galvanizing 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.

1. Surface blasting prior to application of factory-applied post galvanizing wet coatings will produce a high rugosity and not be acceptable.

C.       Architectural Finish:  Provide factory-applied architectural coating over hot-dip galvanized steel, Colorgalv^® by Duncan Galvanizing matching approved samples.

1. Primer coat shall be factory-applied prime coating. Apply primer within 12 hours after galvanizing and within 3 hours of surface preparation at the same facility where the galvanizing is done in a controlled environment meeting applicable environmental regulations and as recommended by the primer coating manufacturer.
2. Finish coat shall be factory-applied high performance 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.
3. Coatings shall be certified VOC compliant and conform to applicable regulations and EPA standards.
4. Apply the galvanizing, primer and coating within the same facility and provide single-source responsibility for galvanizing, priming and finish coating.
5. Blast cleaning of the galvanized surface is not acceptable.

D.       Performance Criteria: Coatings must meet or exceed the criteria for the following categories as stipulated by the coatings manufacturer:

1. Primer:
   ABRASION RESISTANCE - Method: ASTM D 4060 (CS17 Wheel, 1,000 grams     load).1kg load Result: 200 mg loss
   ADHESION - Method: ASTM      D4541 Result: 1050 psi
   CORROSION WEATHERING: Method: ASTM D5894, 13 cycles, 4,368 hours
   Result: Rating 10 per ASTM D714 for blistering; Rating: 7 per ASTM D610 for rusting
   DIRECT IMPACT RESISTANCE: Method: ASTM D2794  Result: 160 in. lbs.
   FLEXIBILITY: Method: ASTM D522, 180º bend, 1” mandrel Result: Passes
   PENCIL HARDNESS: Method: ASTM D3363  Result: 3B
   MOISTURE CONDENSATION RESISTANCE: Method: ASTM D4585, 100º F, 2000 hours
   Result: Passes, no cracking or delamination
   DRY HEAT RESISTANCE: Method: ASTM D2485  Result: 250º F
2. Topcoat:
   ABRASION RESISTANCE - Method: ASTM D 4060, CS17 Wheel, 1,000 cycles 1kg load. Result: 87.1 mg loss
   ADHESION - Method: ASTM D 4541, Result: 1050 psi
   DIRECT IMPACT RESISTANCE: Method: ASTM D2794; Result: >28 in. pounds
   INDIRECT IMPACT RESISTANCE: Method: ASTM D2794; Result: 12-14 in. pounds
   DRY HEAT RESISTANCE: Method: ASTM D2485 Result: 200° F
   SALT FOG RESISTANCE:  Method: ASTM B 117  9,000 hours Result: Rating 10 per ASTM D714 for blistering
   FLEXIBILITY: Method: ASTM D522, 180° bend, 1/8” mandrel Result: Passes
   PENCIL HARDNESS: Method: ASTM D3363  Result: 2H
   MOISTURE CONDENSATION RESISTANCE: Method: ASTM D4585, 100° F, 1000 hours Result: No blistering or delamination
   XENON ARC TEST: ASTM D 4798 Result: Pass 200 hours

E.       Quality Assurance for Hot-Dip Galvanizing and Factory-Applied Metal Coatings:

1. Galvanizing shall be performed by a company with a minimum of ten years experience in the successful application of hot-dip galvanizing utilizing the dry kettle process.
2. Factory-applied metal coatings shall be performed in a facility acceptable to the coating manufacturer.
3. Submit two 3 inch by 6 inch samples of factory-applied coatings and colors proposed for use for approval prior to coating application.
4. Engage the services of a galvanizer who has demonstrated a minimum of ten years experience in the successful performance of the processes outlined in this specification in within the same facility as outlined herein. The Architect has the right to inspect and the facility where the work is to be doneand who will apply the galvanizing and coatings approve or reject the galvanizer/galvanizing facility.
5. Handle and install materials with factory-applied coatings as recommended by galvanizer and coating manufacturer to prevent damage to coatings prior to and after installation.
6. Touch-up factory-applied metal coatings as recommended by galvanizer and coating manufacturer.
7. Certificate of compliance that the galvanizer has certified weighers on premises with a      certification from the local municipality, and a certified scale or municipal scale has been  utilized by the galvanizer.
8. Fabricator shall provide a notarized statement from the galvanizer, along with a description of the material processed, indicating that all work has been done in conformance with this specification prior to receiving payment.
9. Certificate of Compliance for Shop Drawing Review by Galvanizer:  Submit galvanizer's certification that shop drawings for metal fabrications to receive metal coatings have been reviewed and that fabrications are acceptable to galvanizer for proper application of galvanizing and metal coatings. All drawings should be stamped by the galvanizer to indicate approval of design for galvanizing.
10. Substitutions or APPROVED EQUALS are defined as meeting the, aesthetic, durability and all other performance criteria as detailed in this specification. Substitution and/or APPROVED EQUALS requests shall be accompanied by proof that the substitution or APPROVED EQUAL meets or exceeds the aesthetic, durability and all other performance requirements of the specified Duncan Processes. Approvals of the substitution and/or APPROVED EQUALS shall be the right of the Owner, Owner’s Representative, the Architect or the Engineer. Coatings or processes not matching or exceeding the approved specified process including aesthetic, durability and all other performance criteria shall be removed and replaced at the expense of the contractor and all subcontractors that were involved with the supply of, and the application of the non conforming product. Intentional misrepresentation of processes is fraud.
11. Galvanizer/coater shall supply a certificate of compliance that all coatings have been       performed in accordance with QP-3 standards and procedures.
12. Duncan warrants the Colorgalv process to be free from 10% or more visible rust for a period of twenty (20) years. Warranties for fading or discoloration of the finish shall be that which is supplied by the coating manufacturer.