T&D Coatings for electrical transmission towers, poles, and substations.

1. Protecting Georgia TransmissionProtecting Georgia Transmission
Companies weathered galvanizedCompanies weathered galvanized
and previously painted transmissionand previously painted transmission
and substation structuresand substation structures..

3. Back to the FutureBack to the Future
► Oldest surviving basic technology to still beOldest surviving basic technology to still be
sole-sourced since 1955. Many high-sole-sourced since 1955. Many high-
performance coatings developments are tiedperformance coatings developments are tied
to significant cleaning and surfaceto significant cleaning and surface
preparation requirements, which sometimespreparation requirements, which sometimes
trigger extreme controls on environmentaltrigger extreme controls on environmental
costs (full-containment) and other expensivecosts (full-containment) and other expensive
requirements. Lowest cost per square foot perrequirements. Lowest cost per square foot per
year @ 20-30 years life.year @ 20-30 years life.

6. Linseed Oil Wetting andLinseed Oil Wetting and
PenetrationPenetration

7. Essential Properties ofEssential Properties of
CoatingCoating
►Maximum wetting and penetration intoMaximum wetting and penetration into
tight corroded spaces.tight corroded spaces.
►High-build; 9- 11 mils WFT in one coat=High-build; 9- 11 mils WFT in one coat=
8-10 mils DFT.8-10 mils DFT.
►Easy to apply by mitt or pound brush.Easy to apply by mitt or pound brush.
►Maximum barrier properties to resistMaximum barrier properties to resist
moisture, airborne chlorides, chemicals,moisture, airborne chlorides, chemicals,
air pollutants, and ultra-violet light.air pollutants, and ultra-violet light.

8. Candidate Coatings ForCandidate Coatings For
StructuresStructures
►Modified Linseed-Oil Zinc-Dust.Modified Linseed-Oil Zinc-Dust.
►Modified Linseed-Oil MIO/Zinc-Dust.Modified Linseed-Oil MIO/Zinc-Dust.
►Modified Linseed-Oil MIO/Zinc-Dust,Modified Linseed-Oil MIO/Zinc-Dust,
Aluminum, and Ceramic Microspheres.Aluminum, and Ceramic Microspheres.
►Aluminum Epoxy Mastics.Aluminum Epoxy Mastics.
►Calcium Sulfonate Alkyds.Calcium Sulfonate Alkyds.
►Epoxy Penetrating Sealers.Epoxy Penetrating Sealers.

9. Benefits of PenetratingBenefits of Penetrating
SealersSealers
►Tie-down existing old coatings; wickTie-down existing old coatings; wick
under loose edges and into tightunder loose edges and into tight
crevices.crevices.
►Very low viscosity.Very low viscosity.
►No curing stresses that pull off oldNo curing stresses that pull off old
coatings.coatings.
►100% SBV100% SBV
►Tougher and more moisture andTougher and more moisture and
chemical resistant than alkydchemical resistant than alkyd
primers.

10. MIO as Barrier PigmentMIO as Barrier Pigment
►Chemically Inert and very resistant toChemically Inert and very resistant to
pollution.pollution.
►Does not react with high or low pH.Does not react with high or low pH.
(acid and alkaline resistant)(acid and alkaline resistant)
►Labyrinth Effect and Shielding from UV,Labyrinth Effect and Shielding from UV,
pollution, and especially moisture.pollution, and especially moisture.
►Absorbs UV and warms the coating;Absorbs UV and warms the coating;
hence drying.hence drying.

12. MIO: 100 Years of SuccessMIO: 100 Years of Success
►IsIs Non-Toxic, Non-Oxidizing, Non-Non-Toxic, Non-Oxidizing, Non-
Corrosive & Non-FlammableCorrosive & Non-Flammable . With. With
such excellent chemical & environmentalsuch excellent chemical & environmental
properties, it is not a surprise that it is theproperties, it is not a surprise that it is the
world’s most favored barrier pigment forworld’s most favored barrier pigment for
over 100 years. Formulators consider MIOover 100 years. Formulators consider MIO
to be a key weapon in their anti-corrosiveto be a key weapon in their anti-corrosive
arsenal.arsenal.

13. MIO as Barrier PigmentMIO as Barrier Pigment
►Improved mechanical properties.Improved mechanical properties.
►Less crackingLess cracking
►Tougher coating all around.Tougher coating all around.

14. Properties of CeramicProperties of Ceramic
MicrospheresMicrospheres
►Reduces Undercutting and improvesReduces Undercutting and improves
resistance to cathodic disbondingresistance to cathodic disbonding
►Enhances Film-Build and especiallyEnhances Film-Build and especially
edge retention on towers.edge retention on towers.
►Lowers Permeability of the paintLowers Permeability of the paint
film.film.

15. CompositionComposition
Ceramic Beads
Hydrophobic Carbon
SUBSTRATE
Modified Linseed Oil Alkyd Binder
Minimal Solvent
Minimal VOC’s
No Haps

16. Tower FootingsTower Footings
► 1930s and 1940s: Dipped in hot tar. No longer1930s and 1940s: Dipped in hot tar. No longer
specified. Under-film corrosion. Coal-tarspecified. Under-film corrosion. Coal-tar
epoxy used in 1960s-1980s. Not oftenepoxy used in 1960s-1980s. Not often
specified; also strong cohesion vs. sub-filmspecified; also strong cohesion vs. sub-film
corrosion. Results improved when 110 microncorrosion. Results improved when 110 micron
HDG was increased to 200 microns. MoreHDG was increased to 200 microns. More
awareness of conductivity (soil resistivity) pHawareness of conductivity (soil resistivity) pH
values, types of soils, et. al.. 0.5 mm zincvalues, types of soils, et. al.. 0.5 mm zinc
plates welded to tower legs on all sides.plates welded to tower legs on all sides.

18. Tower Footing HistoryTower Footing History
► Zinc plates welded plus hot tar dips.Zinc plates welded plus hot tar dips.
► Tapes used 1955-1980s: Freeze-thaw issues.Tapes used 1955-1980s: Freeze-thaw issues.
► Copper earth mats: tower leg becomes theCopper earth mats: tower leg becomes the
anode= 500 microns per year of corrosion.anode= 500 microns per year of corrosion.
► Moisture-cured coal-tar urethanes frequentlyMoisture-cured coal-tar urethanes frequently
used today (limitations on surface preparationused today (limitations on surface preparation
costs and time)costs and time)

19. Shop Painted Transmission PolesShop Painted Transmission Poles

24. Substation EquipmentSubstation Equipment

25. WHAT MAKES SUBSTATIONWHAT MAKES SUBSTATION
PAINTING UNIQUE?PAINTING UNIQUE?
► SURFACE PREPARATIONSURFACE PREPARATION
► FLOW COATINGFLOW COATING
►Maintain viscosityMaintain viscosity
►Apply uniform 2.5-3.0 mils dft along entireApply uniform 2.5-3.0 mils dft along entire
length of radiatorlength of radiator
► SAFETY IN A HIGH VOLTAGESAFETY IN A HIGH VOLTAGE
ENVIRONMENTENVIRONMENT

27. WHAT MAKES SUBSTATIONWHAT MAKES SUBSTATION
PAINTING UNIQUE?PAINTING UNIQUE?
► SURFACE PREPSURFACE PREP
► FLOW COATINGFLOW COATING
►Maintain viscosityMaintain viscosity
►Apply uniform 2.5-3.0 mils dft along entireApply uniform 2.5-3.0 mils dft along entire
length of radiatorlength of radiator
► SAFETY IN A HIGH VOLTAGESAFETY IN A HIGH VOLTAGE
ENVIRONMENTENVIRONMENT
► COATING SELECTIONCOATING SELECTION

30. WHAT MAKES SUBSTATIONWHAT MAKES SUBSTATION
PAINTING UNIQUE?PAINTING UNIQUE?
► SURFACE PREPSURFACE PREP
► FLOW COATINGFLOW COATING
►Maintain viscosityMaintain viscosity
►Apply uniform 2.5-3.0 mils DFT along entireApply uniform 2.5-3.0 mils DFT along entire
length of radiatorlength of radiator
► SAFETY IN A HIGH VOLTAGESAFETY IN A HIGH VOLTAGE
ENVIRONMENTENVIRONMENT
► COATING SELECTIONCOATING SELECTION

31. SUBSTATION EQUIPMENTSUBSTATION EQUIPMENT
COATING SYSTEMCOATING SYSTEM
►Full prime BodyFull prime Body
Induron’s P-30 Primer RedInduron’s P-30 Primer Red
►Full Intermediate CoatFull Intermediate Coat
Induron’s P-30 Primer TanInduron’s P-30 Primer Tan
►Full Finish CoatFull Finish Coat
Induron’s Indurasil Silicone EnamelInduron’s Indurasil Silicone Enamel