Coating System Classes
High-Performance Powder Coatings - Triple-layer System
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Part 1: GENERAL
1.01: Section Includes
A: Plant application of triple-layer powder coating onto steel fabrication in accordance with NACE International, The Corrosion Society, and SSPC, The society for Protective Coatings.
1.02: DEFINITIONS
A: Contractor: The organization responsible for the preparation and application of the coating.
B: Applicator: The person performing the surface preparation and application of coatings.
C: Manufacturer: The producer and distributor of the coating.
D: NACE: NACE International, The Corrosion Society
E: SSPC: The Society for Protective Coatings.
F: Holiday: A discontinuity of coating that exposes metal surfaces to the environment.
G: T.S.P.: Triple-layer Powder Coating System.
Part 2: PRODUCTS:
2.01: Applicator
A: The New Permacolor Inc., 1020 Cindy Lane, Suite 8, Carpinteria, CA, 93013 (805)684-1341.
Part 3: EXECUTION:
3.01: Surface Preparation for Steel:
A: Applicator shall inspect and clean all metal to SSPC-SP-1 to remove all oil and loosely adhering dirt. Metal shall be checked for possible chloride contamination using IAW SSPC-TU4 methods. If chloride level is above 2 milligrams/m2, it shall be cleaned to remove all chlorides or to bring it below 2 milligrams/m2. ( Ref. NACE RPOW-04)
B: All steel to be coated shall be cleaned by grit blasting to a near-white metal finish in accordance with NACE #2/SSPC-SP10. Abrasives used shall be checked for chlorides. A minimum of one test per 8-hour shift (8) is required. The concentration shall be below 20ppm and the test documented and recorded. Abrasive shall be 20 grit mineral media such as Bar-shot and the blast profile shall be a minimum of 2.0 mils and a maximum height of 4.5 mils. Anchor profile shall be measured by Press-O-Film replication method, x-course grade tape and anvil. One Press-O-Film tape is to be taken for each hour of blasting and documentation is required. The steel shall be coated within 8 hours of blasting. It must be free of grit, soils, media, and no metal shall be allowed to flash-rust before coating.
C: When hanging/racking steel prior to heating, every effort shall be taken to suspend the steel in a manner that leaves no hook or hanging marks. Hook marks create holidays and are not acceptable to the coating inspector.
3:04 : TEST AND APPLICATIONS OF TRIPLE COAT SYSTEMS:
A: Steel that has been blast cleaned, inspected, and approved, shall be pre-heated to 350 degrees F. Calculate metal mass to determine proper dwell time for pre-heat.
B: After steel has been properly pre-heated to 350 degrees F., apply 2.5 to 4 mils of H.B. Fuller, Zinc-rich Epoxy (IF-5616M).
C: Immediately re-heat part to 300 degrees F., and apply 2 to 4 mils T.G.I.C polyester powder coating of color choice, and post-cure parts at 425 degrees F., again figuring mass to determine final dwell time for complete cure.
D: Coating measurements shall be taken and recorded with QuaNix 7500 with memory, or a similar instrument. These measurements are to be downloaded into your computer and will provide secure reading which cannot be modified. These print-outs become part of the testing process and the property of the architect.
E: A certified coating inspector will be “on call” and may inspect the powder coating process at any time. When the inspector visists the applicator, the applicator will provide full access to all records and test procedures, as well as assistance to the inspector in this inspections. All coatings will be inspected prior to shipment to the construction site; 2 working days will be required for these inspections.
F: Repairs: Minor repairs may be done by qualified personnel in the field. Minor repairs are areas less than 2% of the total coating area. All major re-work must be done at the powder coating facility and be approved by the inspector.
3.05 HANDLING AND LOADING:
A: The powder coating shall have sufficient time to cool prior to handling. Nylon straps and furniture pads will be used to protect the finished products.
B: The applicator is responsible for the entire project until it is signed and accepted by the contractor at the job site.