Water Tank Coating Systems that Extend Service Lifec.ymcdn.com/sites/ Tank Coating Systems that...
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Water Tank Coating Systems that
Extend Service Life
Reflecting the revised AWWA D102 Standard
Our Agenda:
• Discuss AWWA RTG
• Discuss Water-borne
Coatings / Coating
Systems
• Discuss 100% Solids
Coatings / Coating
Systems
#1 - AWWA D102 RTG
• Revise and Update
Existing Standard
• Discuss changes to
improve the Standard
• Have a “3 year
revision” goal
• Added 2 new coating systems in 2006 (ICS No. 4 & OCS No. 4)
• Added new Exterior System in 2011: OCS No. 7
• Revised Interior System in 2011: ICS No. 3
Remember:
• “An AWWA Standard is not a
specification, nor [does it] certify
products.”
AWWA Manufacturers Advisory Council
• What you desire must be specified
#2 - WB Acrylic System
• “Acrylic emulsion coatings generally dry
faster and provide improved color and
gloss retention, when compared to alkyd
enamels.”
• These systems include WB Dryfall coatings (for repaint projects in crowded neighborhoods, for example)
Outside Coating System No. 3
• AWWA D102 Revision Task Group has revised the acrylic exterior coating system of the D102 (Tank) Standard
• OCS No. 3: OZ Primer 2.0 mils WB Acrylic Topcoat 2.0 mils WB Acrylic Topcoat 2.0 mils (“Dryfall” versions acceptable)
Proprietary Breakthrough:
• Pro-Cryl/Sher-Cryl (1st-of-its-kind cross-linking
acrylic. For tank & Logo.)
• Sher-Clear (1st-of-its-kind UV-resistant
Clear Topcoat to extend Color
& Gloss up to 5X)
• Fast Clad HB Acrylic (1st-of-its-kind cross-linking
acrylic. 2 – 3 coats DFT in 1)
“Ambient Cure” WB Acrylics
O2
Polymer chains after application
before ambient cure. Polymer chains after branching
at ambient temperature in the
presence of atmospheric oxygen.
Sher-Cryl
Pro-Cryl
Sher-Clear
Fast Clad™ HB Acrylic
• 5.0 - 8.0 mils DFT in ONE COAT
• Apply directly to OZ / IOZ & other primers
• High build eliminates multiple coats*
without eliminating protection
• *Reduces labor expense
Why Important?
• Our cross-linking, “ambient cure” acrylics
extend Service Life because they resist
exterior deterioration.
• When applied over zinc-rich primers (OCS
No. 3), they also provide extended
corrosion protection!
WB Epoxy / Urethane System
• AWWA D102 Revision Task Group has introduced an E / E / U waterborne exterior coating system to the D102 Standard.
• OCS No. 7: WB Epoxy Primer 2.0 mils WB Epoxy Intermediate 2.0 mils WB Urethane Topcoat 2.0 mils
Outside Coating System No. 7
• Harmless water is the
main “solvent”
• WB Acrolon 100 exceeds
the color & gloss retention
of standard SB exterior
systems
• Part of SW’s
INFINITANK™
program!
Advantages of Polyurethanes
• Color & Gloss retention
– Some have graffiti resistance
Primer
Topcoat
Question: If that’s true, why do some tanks
coated with SB urethanes look
so bad?
Answer:
It’s because urethanes are not all
created “equal”!
Y2000 Weathering Study:
• The Sherwin-Williams Company has proven and
quantified that Clear Coats will extend the life of
urethane coatings TWO to FIVE times longer than
“standard” urethanes because they minimize the
damaging effects of the sun’s UV light. Consider
them for your tank logo.
• But contractors have discovered that Clear Coats
may be difficult to apply.
SW Research Continued …
• How to specify UV-resistant exterior tank
coatings reflecting the AWWA D102
Standard?
• Are fluorourethanes (described in OCS No.
4) the ONLY coating type that prevents
color & gloss deterioration?
4G Urethanes vs Fluorourethanes
• Another Protective Coatings industry
first-of-its-kind quantitative test of
urethanes, urethanes with clear coat,
siloxanes, and fluorourethanes.
• Fully funded by The Sherwin-Williams
Company
Results:
• Quantified the exceptional color & gloss
retention of WB Acrolon 100
WTP Tanks (shop-primed)
WTP Tanks (field-painting)
WTP Tanks (finished!)
Why Important?
• WB Acrolon 100 extends Service Life
because it has been formulated with
premium ingredients not found in other
exterior urethanes.
• Now part of SW’s INFINITANK™
Tank Preservation Program with a ZRP to
extend corrosion protection, also.
#3 - 100% Solids System
• AWWA D102 Revision Task Group has revised the epoxy interior coating system of the D102 (Tank) Standard to the following:
• ICS No. 3: Primer (optional) 1.0 mil Epoxy Topcoat 20.0 mils
ICS No. 3: SherPlate PW™
• Exceeds DFT of 3-
coat ICS No. 2 in
ONE COAT saving
labor $$
• SherPlate PW™ is
Edge-Retentive [Mil-PRF-23236 w/QPL number]
• 24-hour Return-to-
Service
Without QPL Edge Retention it’s just “marketing”
ICS No. 3 can protect YOUR tank!
One of America’s largest steel water tank – 34,000,000 gallons!
Why Important?
• SherPlate PW™ epoxy extends Service Life
because it provides edge-retentive, high
build protection on tank interiors … with
award-winning OAP Opti-Check®
OAP: Optically Active Pigments
Areas highlighted
show incomplete
coverage of topcoat
Additional SW Tank Introductions:
• Hi-Solids Polyurethane MR
• PAE – Fast Clad
™ Urethane
Questions?