Architectural Metal CoatingsWhat is in a Coatings Specification?

Specifications and Education for:

• Architects

• Owners

• Consultants

• OEM

• Contractors

Arturo Lugo AIA Architectural Specifications North America

302.635.4980

arturo.lugo@akzonobel.com

Applications Architectural Culture & Market

Durability Standards

Resins Color Characteristics

Examples

Architectural Coatings

Types of coatings

Factory Application

Proper surface preparation

Coating Application

Curing

Application Video

Architectural Metal Products

• Decorative Metal Railings

• Metal Roof & Wall Panels

• Aluminum Doors, Frames,

Windows, Entrances &

Storefronts

• Elevator Components

• Aluminum Curtain Walls

• Metal-Framed Skylights Moynihan Sation NYC

Nottingham Library

• Flashing, Coping & Trims

• Louvers and Vents

• Metal Fencing, Bollards, Wastebaskets & Outdoor

Accessories

• Metal Lamps & Posts

• Furniture & Cabinets

• Metal Building Systems

Architectural Metal Products

Richmond VA City Hall

Applications

Architectural Culture &

MarketDurability Standards

Resins Color Characteristics

Examples

North America

Middle East

Asia Pacific

Europe

QLab testing facility

ApplicationsArchitectural Culture

& MarketDurability Standards

Resins Color Characteristics

Examples

AAMA - American Architectural Manufacturers Association

Specification 2603 2604 2605

South Florida South Florida South Florida South Florida

Weathering Weathering Weathering Weathering

Color retention 1 year "slight fade" 5 yrs: Fade = 5 Delta E 10 yrs: Fade = 5 Delta E

Chalk Resistance 1 year "slight chalk" 5 yrs : Chalk = 8 10 yrs : Chalk = 8

Gloss Retention No Specification 5 yrs: 30% retention 10 yrs 50% retention

Erosion Resistance No Specification 5 yrs : 10% Loss 10 yrs : 10% Loss

Liquid DFT 0.8 mils min 1.2 mils min 1.2 mils min

Powder DFT 2.0 mils min 2.0 mils min 2.0 mils min

Pretreatment System Chrome or Chrome Free Chrome or Chrome Free Chrome or Chrome Free

Accelerated Testing

SaltSpray 1500 hrs 3000 hrs 4000 hrs

Humidity 1500 hrs 3000 hrs 4000 hrs*

AAMA 2605 – Corrosion is now tested at 2000 HR G85A5 Cyclic Corrosion

ASTM B117

Most commonly referenced coating standards for coated fenestration products

Florida climate combines

• Strong UV attacks

• High temperatures

• High humidity

Florida testing consists of observing color variation and gloss change over time.

Lab equipment

• Accelerated exposure tests

• Performance tests

• Specialized tests (temperature, corrosion, etc)

There are two basic weathering failure modes:

• Chalk: failure or degradation of the resin

• Fade: breakdown of the pigment

In each case, the resin builds the film and binds the coating

to the substrate, providing the weather resistance and

durability properties desirable in an architectural coating.

AAMA Specification: Fade & Chalk

Understanding AAMA / Qualicoat

Resin selection

Color selection

Testing

ApplicationsArchitectural

Culture & MarketDurability Standards

Resins Color Characteristics

Examples

Different resin types commonly used in the metal industry:

Acrylic liquid AAMA 2603

Polyester liquid AAMA 2603

Polyester powder AAMA 2603

PVDF 50% liquid AAMA 2604

Super durable polyester powder AAMA 2604

PVDF 70% liquid AAMA 2605

Fluorocarbon powder FEVE AAMA 2605

Resins used to achieve AAMA specifications

PVDF Resin BRANDS

FEVE Resin BRANDS

Fluorocarbon Polymers Resins

Based on Hyper Durable Technology –

fluorocarbon chemistry applied to a powder

coating to give the ultimate in exterior durability

• The carbon/fluorine bond is one of the

strongest molecular bonds

• FEVE is a true powder coating alternative to

liquid PVDF

Powder Coatings

• A dry powder paint with no solvents or VOCs

• Applied by industrial coaters to aluminum

• Gives outstanding weather stability combined

with high chemical resistance and low soiling

• Attractive finish available in many colors and

metallic effects

• Meets the world’s toughest quality standards

FEVE in Powder Coatings

ApplicationsArchitectural Culture

& MarketDurability Standards

Resins Color Characteristics

Examples

Coatings are available in a wide

selection of colors. But as

durability specification increases,

the range of colors reduces, so

does the gloss selection.

• AAMA2603 – Maximum

Colors Available

• AAMA2604 – Reduced

Selection

• AAMA2605 – Limited to

Neutral Colors

Key is to achieve a good

combination of resin and color

selection to extend durability.

Color Selection

Delta E = 5

Looks like this

ApplicationsArchitectural Culture

& MarketDurability Standards

Resins Color

Characteristics• Coats

• Metallic

• Corrosion

• VOC

Examples

Coatings Compared

Standard

Polyester

Powder

Superdurable

Polyester

Powder

FEVE

Powder

PVDF

Liquid

Meets AAMA 2603 AAMA 2604 AAMA 2605 AAMA 2605

Coats 1 1 1 2-4

Color Range ***** **** Not very bright colors

Metallic Range *** *** *** *****

Toughness *** *** ** *

Solvents VOC 0 0 0 Up to 65%

Chem. resistance Moderate Moderate Excellent Excellent

Dirt Resistance Moderate Moderate Excellent Excellent

Corrosion res. Low Moderate Moderate Moderate

Single Coat vs. Multiple Coats

Powder Liquid

• Single coat (monolithic properties)

• Electrostatic application equipment

• 2.5 to 4 mils DFT

• High Transfer Capabilities (zero waste)

• Multiple coat (depth appearance)

• Normal application equipment

• 1.3 to 1.8 mils DFT

• Lower Efficiency (% of material utilized)

Metallic Color (90° vs. Flop)

Mica / Metallic Flake

• Until recently, the appearance of

metallic finishes in powder couldn’t

reach the depth and brightness of

liquid PVDF.

• Innovation lead to broad range of

bright, metallic and matt finishes.

• Liquid and Powders offer different

appearances:

• View at arm’s length, holding

panels at a 90° angle, with sun

shining over your shoulder (or view

in D65 light booth, arm’s length,

holding panels at a 90°)

Environmental VOC

• Powder has no VOCs, thus it results in fewer emissions.

• In liquid coatings, VOCs are destroyed in most production in USA, thus eliminating 95% of emissions

Category Corrosivity Examples (outdoor)

C1 Very lowDry or cold zone, atmospheric environment with very low pollution and time of

wetness, e.g. certain deserts, Central Arctic/Antarctica

C2 LowTemperate zone, atmospheric environment with low pollution

(SO2: <5 μg/m3) e.g. rural areas.

Dry or cold zone with short time of wetness

C3 Medium

Temperate zone, atmospheric environment with medium pollution

(SO2: 5 μg/m3 to 30 μg/m3) or some effect of chlorides, e.g. urban areas,

coastal areas with low deposition of chlorides

Subtropical and tropical zone, atmosphere with low pollution

C4 High

Temperate zone, atmospheric environment with high pollution

(SO2: 30 μg/m3 to 90 μg/m3) or substantial effect of chlorides, e.g. polluted

urban areas, industrial areas, coastal areas without spray of salt water or,

exposure to strong effect of de-icing salts Subtropical and tropical zone,

atmosphere with medium pollution

*C5Very

high

Temperate and subtropical zone, atmospheric environment with very high

pollution (SO2: 90 μg/m3 to 250 μg/m3) and/or significant effect of chlorides, e.g.

industrial areas, coastal areas, sheltered positions on coastline

*CX Extreme

Subtropical and tropical zone (very high time of wetness), atmospheric

environment with very high pollution (SO2: higher than 250 μg/m3) including

accompanying and production factors and/or strong effect of chlorides, e.g.

extreme industrial areas, coastal and offshore areas, occasional contact with salt

spray

Other Considerations: Corrosion

ApplicationsArchitectural Culture

& MarketDurability Standards

Resins Color

Characteristics:

• Multiple vs. Single Coat

• Metallic Flop (Directionality)

• VOC

Examples

• Mostly used for interior applications

• Also used in exterior areas with limited exposure to UV

• 1 year Florida color retention (per AAMA)

• Many color options available for powder and liquid coatings.

AAMA 2603 / Qualicoat class I

Torre el Faro, Argentina

AAMA 2604 / Qualicoat Class IIHigher durability standard than AAMA 2603

5 year Florida color & gloss retention (per AAMA)

Used for exterior applications Globally for over 30 years

Mission Viejo Hospital, California (1991) The Shard, UK

Hudson Yards, NYC

Exterior applications on prestigious buildings or in

extremely high weatherable areas

Highest durability standard in the market. 10 year

Florida color & gloss retention (per AAMA).

Reduced color and gloss selection

AAMA 2605 / Qualicoat class III

30 Hudson

10 Hudson 35 Hudson

50 Hudson

Fosters

Business unit | Footer33One Vanderbilt

425 Park NYC

515 W 18th St. NYC

Uber HQ, San Francisco CA

Sublimation Technology -Wood Imitation

• Project : Opera House (Dubai)

• Product : Interpon D2525 STF Textured

• Consultant: ATKINS

• Fabricator: Al Ghurair

• Applicator : Joseph Industries

Relative Photo

Project : Jabal Omar

Product : Ral 1035 Matt D3020 – hyper durable + YY217E

Location : K.S.A.

Consultant : Alumco

Applicator : Alumetal/ Al Taseeir/ KAFCO

Fabricator : Profil System

Anodized

Project : Royal Palm Atlantis Resort

Product : YW2834 + 3 terracotta shades

Location : Dubai UAE

Consultant : KPF - New York

Relative Photo

Terracotta appearance

Example: Monumental project in Boston:

Determine parts to be coated

Determine color in liquid / powder / touch up

Determine DURABILITYAAMA 2605 or equivalentFLUOROPOLYMERS: PVDF, FEVE or equivalent

Determine specialized tests: temperature, deicing, salts, extended corrosion

Determine corrosion environment

Determine environmental requirements

REQUIRE AAMA CERTIFIED APPLICATORS

Still in doubt?

Ask your trusted coatings manufacturer for a sample specification.

Conclusion: How to Specify

Powder or Liquid technology

Describe the way the paint was applied

• Means & Methods of Construction

• Either can perform well depending on the performance required

Factors that will drive one technology vs. another:

• Owner / Curtain Wall / Building Components / Consultants

• Coil, Extrusion, Elevator, Handrails,

• Region of the project and application

• Europe (Powder), US (Both), China (Both), etc.

• Transportation, Installation & Maintenance factors

• Environmental Factors

Conclusion: Architectural Coatings

Thank you

Questions?