use of field-applied fluoropolymer coatings for maintenance and restoration applications d+d webinar...

Use of Field-Applied Fluoropolymer Coatings for

Maintenance and Restoration Applications

D+D WebinarBob Parker (AGCCA)

June 29, 2011

Field-applied Maintenance & Restoration Coatings

Outline 1) Why are you considering recoating the

structure?

2) Choice of Coating Type

3) Identification of Surfaces to be coated

4) Substrate Preparation

5) Application of Coating

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Why are you considering recoating the structure?

Aesthetics Protection of substrate Energy Savings Expansion / Remodeling Resale of Structure

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Choice of Coating Type:

cost considerations substrate being coated previous coating used on structure length of future ownership (color scheme) experience of coating applicators exposure to sun and geographic location LEED certification (favor FEVE coatings)

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LEED credits toward certificationo “Leadership in Energy and Environmental Design”o created by U.S. Green Building Council (non-profit; founded in

1993)o LEED certification is voluntaryo Benefits are measured in many ways:

- increase in appeal of building to tenants (higher rents)

- chance for tax credits

- cost effective (new construction)

- mitigate risks/lawsuits

- competitive differentiator

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“LEED 2009 for Existing Buildings: Operations and Maintenance”

- explains how to receive credit points toward certification

Four categories found for possible credits for FEVE coatings:

1) Sustainable Sites

SS Credit 2: Building Exterior & Hardscape Management Plan

SS Credit 7.1: Heat Island Reduction – Non-Roof

2) Energy and Atmosphere

EA Credit 1: Optimize Energy Efficiency Performance

3) Materials and Resources

MR Credit 3: Sustainable Purchasing – Facility Alterations and Additions

4) Innovations and Operations

IO Credit 1: Innovative Changes to Building (LEED-type goal)

IO Credit 3: Documenting Sustainable Building Cost Impacts

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Identification of Surfaces to be coated:

• Discussion will involve factory-coated materials

• 3 step evaluation is suggested

1) Establish type of metal substrate

2) Identify the previous coating

3) Identify and correct any problem areas of the structure

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Types of metal that are factory-coated:

1) cold-rolled steel

2) hot-dipped galvanized

3) electrogalvanized

4) zinc-steel

5) aluminum

6) stainless steel

7) copper

8) brass

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Identification of Previous Coating PVDF coating vs. non-PVDF coating

- will determine the proper procedure for surface preparation

- adhesion to a fluoropolymer can be difficult

- PVDF can be recoated providing:

1. It has reached a ripe old age

2. It is given the proper surface treatment

3. An approved primer is used

4. Primer passes ASTM D3359 adhesion test

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PVDF Coating – after 20 years of outdoor

weathering(5000X magnification)


Correction of Problem Areas

Corrosion – simple or galvanic Water Drainage Problems – resulting in discoloration

of the coated surfaces Water infiltration Poorly applied recoats or touchups

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Substrate Preparation – non-FerrousSSPC–SP 16

“Brush-off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and NON-Ferrous metals”

SSPC SP-1 - removal of dirt, chalking, and oil deposits Brush-Blasting with wet or dry abrasive; closed cycle Recommended abrasive selection (size and type) depends on:

a. type, grade, and surface condition of the substrate

b. type of blast cleaning system

c. finished surface to be produced

d. abrasive to be recycled or not Second Cleaning per SSPC SP-1 Profile Minimum = 19 microns (0.75 mils); check with ASTM D 4417 or

ASTM D 7127

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Substrate Preparation - Steel1) SSPC–SP 6

“Commercial Blast Cleaning” SSPC SP-1 - removal of dirt, chalking, and oil deposits Blasting Cleaning with wet or dry abrasive; closed cycle Recommended abrasive selection (size and type) depends on:

a. type, grade, and surface condition of the substrate

b. type of blast cleaning system

c. finished surface to be produced

d. abrasive to be recycled or not Second SSPC SP-1 Cleaning

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Application of FEVE Coating:1) FEVE Coating comparable to a Two-component Polyurethane

Coating; available as a solvent-based system and a water-based system

2) Can also be supplied as a one-component solvent-based coating or a one-component water-based coating

3) All coatings can be brush, rolled or sprayed

4) Follow the specific instruction from each manufacturer

5) Pot lives of 2K coatings decrease quickly as the air temperature increases:

5 hours @ 50° F. 1 hour @ 90° F.

6) All coatings available in a wide range of glosses

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Sunshine Weatherometer Exposure Testing (Carbon Arc)


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EMMAQUA Testing (Outside Test Fence – Arizona)


Conclusion:FEVE Coatings can be used as field-applied

coatings over PVDF-based factory-applied finishes. Superior weathering performance can be obtained comparable to the PVDF finishes. Solar reflective coatings containing IR-reflective pigments can also

be incorporated into an FEVE coating.

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use of field-applied fluoropolymer coatings for maintenance and restoration applications d+d webinar...

Documents

applied fluoropolymer

use of field

magnification slide

application of coating

nonpvdf coating

o leed certification

credit points

leedtype goal io credit