Substrates and PaintsSubstrates and Paints

Substrates and PaintsSubstrates 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)

SubstratesSubstrates

Coated Carbon Steel Hot Dipped Galvanized

G-90 Galvalume

AZ50 Aluminum

Alloy 3003 Temper – H14

Hot Dipped Galvanized 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

Galvanic Protection 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

Galvalume Galvalume

By volume, Galvalume contains 80% aluminum in the coating; the other 20% contains zinc and silicon additive

Aluminum/Zinc coated carbon steel sheet meets ASTM A792-96

By volume, consists of a minimum thickness of .50 oz. per sq. ft. of Zn/Al for both sides of the steel sheet

Galvalume Galvalume

Coating weight – AZ50 or AZ55 Great corrosion properties Good sacrificial advantages 20 year, 6 month warranty against

corrosion

Galvalume vs. HD GalvanizedGalvalume 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

Corrosion Losses of Galvalume and Galvanized Sheets Corrosion Losses of Galvalume and Galvanized Sheets After 13 Years of ExposureAfter 13 Years of Exposure

0 0.5 1

RURAL

INDUSTRIAL

MARINE - 800 FT

SEVERE MARINE - 80 FT

Corrosion Loss (Mils)Corrosion Loss (Mils)

Salt Spray Corrosion ResistanceSalt 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, determined that the corrosion resistance is typically three to four times that of G90 HD Galvanized

Salt Spray Test Concerning the Amount Salt Spray Test Concerning the Amount of Hours to First Significant Rustof Hours to First Significant Rust

0

500

1000

1500

2000

2500

3000

UnprotectedEdges

Protected Edges

Galvalume

H.D. Galvanized

Total # of Hours

Aluminum

Alloy 3003 Temper – H14

Painted ProductsPainted Products

What a Painted Product Consists of:What a Painted Product Consists of:

Cold Rolled Steel

Zinc (HDG) orZinc-Aluminum

(Galvalume®)

Substrate

Pre-Treatment

Layer

Substrate

Pre-Treatment

Layer

Primer(0.20 - 0.25

mils)

TRINAR ®Topcoat

(0.70 - 0.90 mils)

Primer(0.20 - 0.25

mils)

Polyester Backer(0.30 - 0.50 mils)

Prepaint Cross-Section

Pre-TreatmentsPre-Treatments

A liquid used to produce a corrosion-resitant, organic bonding coating on aluminum, Galvalume, and Galvanized

An approved chromate rinse which is the major agent that allows the primer to bond to the substrate

Approved by Bethlehem Steel for the use on Galvalume

Pre-TreatmentsPre-Treatments

Benefits of pre-treatmentsProvide superior long-term

corrosion protectionEffective on aluminum,

Galvalume and GalvanizedCoating quality is consistently

maintained

PrimerPrimer

The base layer of the paint applied by the coater

Formulated to provide corrosion protection to the base metal and to enhance adhesion between the top coat (paint) and the base metal

Major Components That Make Up a Major Components That Make Up a Paint SystemPaint System

PigmentsPigments ResinResin SolventsSolvents AdditivesAdditives

PigmentsPigments

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 Earth tones Organic

Two classes of pigments: Appearance Functional

PigmentsPigments

Resin Systems 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)

SolventsSolvents

The vehicle by which the pigment is “transported” to the metal surface

Solvents evaporate during the curing process to permit the formation of a paint film

AdditivesAdditives

Any number of chemicals added to the paint, usually in small amounts, to bring special effects to the paint

Component FunctionsComponent Functions

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

Types of Paint SystemsTypes of Paint Systems

Polyester Siliconized Polyester Polyvinylidene Fluoride (PVDF)

Polyester Paint SystemsPolyester Paint Systems

A generic polymer coating with limited weathering performance End uses: interior applications

Home appliances Lighting fixtures Wall panels

Siliconized Polyester Paint Siliconized Polyester Paint SystemsSystems

A generic coating type that represents a wide range of topcoats used on pre-painted metal in construction

The silicon extends the service life of the base polymer and improves weathering

End uses: Metal building components Agricultural and corrugated panels

Polyvinylidene Fluoride (PVDF)Polyvinylidene Fluoride (PVDF)

A fluoropolymer resin used as the major vehicle (base resin) in the paint system

Paint chemistry is 70% by weight PVDF resin

Exhibits superior: Color retention Chalk resistance Corrosion resistance Flexibility Stain resistance Overall exterior durability

PVDF CoatingsPVDF Coatings

Architectural coatings that Architectural coatings that extend building life and keep it extend building life and keep it

looking the way it was designed!looking the way it was designed!

How it worksHow it works

Advance molecular structural of PVDF utilizes 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

is the measured effect of sunlight, UV radiation, heat, and moisture on

pre-painted steel

is the measured effect of sunlight, UV radiation, heat, and moisture on

pre-painted steel

Paint weathering is measured Paint weathering is measured in resistance to:in resistance to:

DefinitionsDefinitions

Chalk: Residue resulting from weathering

decomposition of paint films Visual ratings are assigned according

to ASTM D659; ratings range from 10-0 (10 is best)

Fade: change in a paint film color and appearance due to degradation from weathering and UV radiation in sunlight

Chalk: Residue resulting from weathering

decomposition of paint films Visual ratings are assigned according

to ASTM D659; ratings range from 10-0 (10 is best)

Fade: change in a paint film color and appearance due to degradation from weathering and UV radiation in sunlight

DefinitionsDefinitions

Color fade: Expressed in calculated “delta E”

values or NBS units which are measured and calculated according to ASTM D2244

Values range from 0 to infinity, where0 is best; i.e., no color change

Color fade: Expressed in calculated “delta E”

values or NBS units which are measured and calculated according to ASTM D2244

Values range from 0 to infinity, where0 is best; i.e., no color change

PVDF CoatingsPVDF Coatings

Made with 70% PVDF resin – KYNAR® 500 or HYLAR® 5000

Exhibit excellent fabrication flexibility and weatherability

Use ceramic-inorganic pigments, which provide excellent resistance to color chalking and fading

Made with 70% PVDF resin – KYNAR® 500 or HYLAR® 5000

Exhibit excellent fabrication flexibility and weatherability

Use ceramic-inorganic pigments, which provide excellent resistance to color chalking and fading

Cold Rolled Steel

Zinc or Zinc-Aluminum Layer

Ceramic/Inorganic Topcoat Pigment

PVDF Resins Surrounding Topcoat Pigment

Metal Treatment

Metal Treatment

0.2-milPrimer0.2-milPrimer

0.8-milTopcoat0.8-mil

Topcoat

Topcoat Layer: Protects Against Topcoat Layer: Protects Against UV Radiation, Heat and MoistureUV Radiation, Heat and Moisture

South Florida Exposure Testing EMMAQUA Exposure Testing

Test Panels

Mirrors

Why PVDF is # 1Why PVDF is # 1

PVDF vs. Other CoatingsPVDF vs. Other Coatings

Color Change

0

5

10

15

20

25

30

0 1 2 3 4 5 6 7 8 9 10 11

Florida Exposure Time (Years)

Co

lor

Ch

an

ge

(de

lta

E)

SMP

Polyester

PVDF

PVDF vs. Other CoatingsPVDF vs. Other Coatings

Gloss Retention

0

20

40

60

80

100

1 2 3 4 5 6 7 8 9 10 11

Florida Exposure Time (Years)

Glo

ss R

eten

tio

n (

%)

Polyester

SMP

PVDF

Weathering PropertiesWeathering Properties

0

1

2

3

4

5

ColorRetention

GlossRetention

ChalkResistance

HumidyResistance

Legend: 5 = Highest Performnce 1 = Lowest Performance

Polyester

SMP

PVDF

Physical PropertiesPhysical Properties

0

1

2

3

4

5

AbrasionResistance

ImpactResistance

FilmFlexibility

Hardness Mar

Legend: 5 = Highest Performnce 1 = Lowest Performance

Polyester

SMP

PVDF

Chemical PropertiesChemical Properties

0

1

2

3

4

5

Aids& Alkalies Oil Stain Water Immersion

Legend: 5 = Highest Performnce 1 = Lowest Performance

Polyester

SMP

PVDF

Superior Chalking and Superior Chalking and Weathering ResistanceWeathering Resistance

These panels exposed at an independent test facility in Southern Florida clearly demonstrate the superior weather-ability of PVDF (left sample)

Elements of a PVDF WarrantyElements 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: Corrosion /

degradation of the substrate

EXCEPTIONAL MetalsEXCEPTIONAL Metals

Offers Akzo Nobel Trinar coated products.Offers Akzo Nobel Trinar coated products.