2. “Coil Coating”

3. (Not to Scale) Dual Uncoilers Joiner Entry Accumulator Exit Accumulator Finish Oven Prime OvenCleaning Section Pretreat Section Inspection & Physical Test Area Water Quench Recoiler Shear Prime & Quick Change Coaters Water Quench Finish Coater Overall line length - Approximately 700 feet Strip to thread the line - Approximately 2800 feet Schematic: Typical Coil Coating Line General Overview

4. Coil Coating: The Process General Overview Receiving Entry Section Cleaning & Pretreatment Coating & Curing Exit End Physical Testing

5. Record Identity Visual Inspection Obvious Damage –Dents, Torn Paper, etc. –Wet? Material Handling Crane or Forklift Store for Future Use Capacity: 3 Mos. Coil Coating: The Process Receiving

6. Coil Coating: The Process General Overview Receiving Entry Section Cleaning & Pretreatment Coating & Curing Exit End Physical Testing

7. Get Steel l- FIFO & ID Check Metal Specifications –Grade/Gauge/Wi dth/Etc. –Quantity/Coil Size Check Condition –Edges –Shape –Zinc Surface Coil Coating: The Process Entry Section

8. Coil Cars Floor or Pit Pay Off Arbors Coil Size –Width –ID or OD & Weight Joiner/Welder Coil Coating: The Process Entry Section I

9. De-burring Rolls Pre-cleaner Entry Bridle Entry Tower Hydraulic/Electric Coil Coating: The Process Entry Section II

10. Receiving Entry Section Cleaning & Pretreatment Coating & Curing Physical Testing Exit End Coil Coating: The Process General Overview

11. Rinse Clean & Brush Clean & Rinse Chemical Treatment –Single or Multi-Stage Final Rinse Waste Treatment; Chrome Coil Coating: The Process Cleaning & Pretreatment I

12. The key to quality is preparing the metal to accept the paint. Pretreatments enhance the corrosion resistance of the system. The type of pretreatments used depends on the base metal. −Galvanized - Zinc Phosphate 37S −Galvalume - Chromate Oxide 1310 −Final Rinse - Parcolene 62 Chromic Acid −Dried-in-Place Coatings: 1402W (some Cr. free) −Duplex Complex Oxide or Zinc Phos. & 1402W Coil Coating: The Process Cleaning & Pretreatment II

13. Coil Coating: The Process Cleaning & Pretreatment III  A liquid used to produce a corrosion-resistant, organically bonded coating on Aluminum, Galvalume and Galvanized.  Incorporating a chromate rinse which is the major agent that allows the primer to bond to the substrate and helps prevent corrosion.  Benefits of Pretreatments: Provides superior long term corrosion. Effective on Aluminum, Galvalume and Galvanized. Coating quality is consistent.

14. Receiving Entry Section Cleaning & Pretreatment Coating & Curing Physical Testing Exit End Coil Coating: The Process General Overview

15. Specification –Primers, Backer, Topcoat –Cure time & Line Speed Coater Paints Topcoat & Backer at the Same Time Usually Two Complete Sets −Coater, Oven and Quench for Primers and finish Coats Line Direction Coil Coating: The Process Coating & Curing I

16. Coil Coating: The Process Coating & Curing II Coating Speeds up to 650 fpm –Speed dependent on cure requirements, gauge and solvent loads Ovens mostly Cantenary Type - 130 to 160 ft. long Cure is Determined by Peak Metal Temperature Cure Occurs in 14 - 22 Seconds

17. Coil Coating: The Process Coating & Curing III - PRIMER  The base layer of the paint applied by the coater to the pretreated substrate.  It is formulated to provide corrosion protection to the base metal and to enhance adhesion between the top coat (paint) and the base metal.  Standard Primers: Water Based Urethane Based

18. Receiving Entry Section Cleaning & Pretreatment Coating & Curing Physical Testing Exit End Coil Coating: The Process General Overview

19. Utilize a Color Difference Meter Assigns value corresponding to the amount of light at each wavelength Value is compared to and held in tolerance of Color Standard Coil Coating: The Process Physical Testing – Hunter L.A.B. L = +0.2 a = -0.4 b = -0.3 Specimen Light SourceDiffraction Grating Diode Array Data Processor Data Display

20. 5/8” diameter steel ball is dropped from a prescribed height onto the panel. Effect leaves a deformation that is subject to cross hatch and tape test. Tape (Scotch #610) is aggressively adhered and pulled (not peeled) away from the sample. Coil Coating: The Process Physical Testing – Reverse Impact Adhesion

21. Brake press forming of metal sample Tape (Scotch #610) aggressively applied and pulled away Coil Coating: The Process Physical Testing – Flexibility

22. Scribe cut with calibrated blade Visual inspection with reticle enable microscope Measures Primer DFT Measures Topcoat DFT Tooke Gauge Coil Coating: The Process Physical Testing – Film Thickness

23. MEK = Methyl Ethyl Keytone Indicates Proper Cure Solvent is liberally applied and cheesecloth is stroked back and forth across panel face for prescribed # of strokes Coil Coating: The Process Physical Testing – Solvent Resistance

24. Instrument measures reflected gloss Typically measured at 60° Ultra low gloss measured at 85° Coil Coating: The Process Physical Testing – Gloss Meter

25. Receiving Entry Section Cleaning & Pretreatment Coating & Curing Physical Testing Exit End Coil Coating: The Process General Overview

26. Recoil Coil Tipper - Coils Eye to the Sky Package - Paper Wrap & Skid Tag/Record Store or Ship Coil Coating: The Process Exit End