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Drexel Substrates And Paints Revised
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Drexel Substrates And Paints Revised

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  • Corrosion Loss (Mils) Severe Marine – 80 foot Marine
  • Mar rate – Kynar is more flexible and softer Polyester – SMP Harder resin
  • Transcript

    • 1. Substrates and Paints Drexel Metals Corporation 204 Railroad Drive Ivyland, PA 18974 Brian Partyka www.drexmet.com
    • 2. Substrates and Paints
      • Substrates
        • Hot Dipped Galvanized
        • Galvalume
        • Aluminum
      • Paint
        • The importance of Pre-Treatments
        • The importance of Primers
        • Paint Systems used in our industry.
          • Polyesters
          • Siliconized Polyester
          • Polyvinylidene Fluoride (PVDF)
          • Plastisols
    • 3. Substrates
      • Coated Carbon Steel
        • Hot Dipped Galvanized
          • G-90
        • Galvalume
          • AZ50
      • Aluminum
        • Alloy 3003 – 3004 - 3105
        • Temper – H14 – H24 – H34
    • 4. Hot Dipped Galvanized
      • Zinc Coated Carbon Steel sheet that meets ASTM A653-96.
      • Coating Weight of G-90
        • By volume consists of a minimum thickness of .80 oz of zinc per Sq Ft for both sides of the steel sheet.
      • Great Sacrificial Advantages
      • No applicable corrosion warranty
    • 5. Galvanic Protection
      • Coating is 100% zinc by volume
      • Hot Dipped Galvanized offers a desirable characteristic with respect to corrosion by sacrificing itself to protect slit edges and scratches.
      • Generally has a smoother surface for paint application purposes.
      • Superior Formability.
    • 6. Galvalume
      • By volume, Galvalume contains 80% aluminum in the coating with the other 20% containing zinc and silicon additive.
      • Aluminum/Zinc Coated Carbon steel sheet that meets ASTM A792-96.
      • By volume consists of a minimum thickness of .50 oz per Sq Ft of AL/Zn for both sides of the steel sheet.
      • Coating Weight – AZ50 or AZ55
      • Great Corrosion Properties
      • Good Sacrificial Advantages
      • 20 year 6 month warranty against corrosion
    • 7. Galvalume vs. HD Galvanized
      • Hot Dipped Galvanized
        • After 18 years, G-90 Galvanized exhibits red rust
      • Galvalume
        • Galvalume after 23 years – No major sign of red rust.
      Moderate Marine / Rural
    • 8. Corrosion Losses of Galvalume and Galvanized Sheets after 13 years exposure Corrosion Loss (Mils)
    • 9. Salt Spray Corrosion Resistance
      • With cut edges protected, the coating on Galvalume AZ50 lasts 5 to 10 times longer than the coating on G90 HD Galvanized.
      • Salt spray tests conducted with bare cut edges exposed, the corrosion resistance is typically three to four times that of G90 HD Galvanized.
    • 10. Salt Spray test concerning the amount of hours to first significant rust Total # of Hours
    • 11. Aluminum
      • Conforms to ASTM B209-96.
      • Either:
        • Direct cast from ingot.
        • Continuous cast from recycled scrap.
      • Advantages:
        • Light in weight.
        • Highly resistant to corrosion.
        • Excellent reflector of light and heat.
        • Highly workable and easy to form.
    • 12. Aluminum Alloys and Tempers
      • Standard alloys for roofing and cladding;
        • 3003
        • 3004
        • 3105
        • 5052
      • Commonly used tempers;
        • H 14
        • H 24
        • H 34
    • 13. Painted Products
    • 14.  
    • 15. What a painted product consists of:
    • 16. Pre-Treatments
      • 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 consistently maintained.
    • 17. 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. What are the 4 major components that make up a paint systems
      • Resin
      • Pigments
      • Solvents
      • Additives
    • 19. Resin Systems
      • The most important part of any paint system.
      • The liquid glue of the paint system that surrounds the pigment particles, protecting them from environmental pollutants such as airborne chemicals and salt.
      • Types of resin systems:
        • Polyester
        • Siliconized Polyester
        • Polyvinylidene Fluoride (PVDF)
    • 20. Pigments
      • Small solid particles added to a paint to enhance appearance by providing color and /or improve physical (functional) properties of a paint.
      • Pigments are protected by the resin system.
      • Types of Pigments:
        • Ceramic Pigments
        • Earth Tones Pigments
        • Organic Pigments
      • UV Reflective Pigments
    • 21. Solvents
      • This is the vehicle by which the pigment is transported to the metal surface
      • Actually evaporate during the curing process to permit the the formation of a paint film.
    • 22. Additives
      • Any number of chemicals added to the paint, usually in small amounts to bring special effects to the paint.
    • 23. Functions of the Components Pigment Resin Solvent Additive Aesthetics Properties Application Enhancement Color Durability Stability Mar Resistance Gloss Adhesion Viscosity Curing Agent Adhesion Flexibility Compatibility Settling Film Strength Color Retention Film Control Dispersion Water Resistance Abrasion Adhesion Anti-Freeze Corrosion Resistance Impact Resistance Leveling De-Foaming
    • 24. Types of Paint Systems used in the field.
      • Polyester
      • Siliconized Polyester
      • Polyvinylidene Fluoride (PVDF)
      • Plastisols
    • 25. Polyester Paint Systems
      • A generic polymer coating with limited weathering performance.
      • Generally Using Organic Pigments.
        • End Uses:
          • Interior Applications
            • Home Appliances
            • Lighting Fixtures
            • Wall Panels
    • 26. Siliconized Polyester Paint Systems
      • A generic coating type that represents a wide range of topcoats used on prepainted metal in construction.
      • The silicon extends the service life of the base polymer and improves weathering.
      • Generally Using Organic and Ceramic Pigments.
        • End Uses:
          • Metal Building Components.
          • Agricultural and Corrugated panels.
    • 27. Polyvinylidene Fluoride (PVDF)
      • The resin, which is a fluoropolymer, that is used as the major vehicle (base resin) in the paint system.
      • Paint chemistry of 70% by weight of PVDF resin.
      • Exhibits superior
        • Color retention
        • Chalk resistance
        • Corrosion Resistance
        • Flexibility
        • Stain Resistance
        • Overall exterior durability
    • 28. Why PVDF is # 1
    • 29. How it works!
      • Advance molecular structural of PVDF utilizes the following:
        • carbon-fluorine bond, the strongest bond known in the chemical world combined with a carbon-hydrogen bond, which creates a structure that is extremely durable.
    • 30. PVDF Coatings Architectural Coating that extends your buildings life, and keeps it looking the way you designed it!
    • 31. PVDF vs. Other Coatings
    • 32. PVDF vs. Other Coatings
    • 33. Weathering Properties
    • 34.  
    • 35. Physical Properties
    • 36. Chemical Properties
    • 37.  
    • 38.  
    • 39.  
    • 40.  
    • 41. Superior Chalking and Weathering Resistance
      • These panels exposed at an independent test fence facility in Southern Florida clearly demonstrate the superior weatherability of PVDF.
    • 42. Elements of a PVDF Warranty
      • PVDF Paint Warranties cover the following for 20 years:
        • Film Integrity
        • Color Fade
        • Chalk Resistance
        • Delamination
      • PVDF Paint Warranties do not cover the following:
        • Corrosion/degradation of the substrate
    • 43. Tobago Hilton Manufacture and Contractor: Weathershield Caribbean Ltd. Trinidad and Tobago
    • 44. DREXEL METALS CORPORATION offers Akzo Nobel Trinar coated products!