Twin City Protective Coatings Guide - ES-35 - Manual (Page 4)

Description of Coating Materials
Asphaltum Coating
Offers excellent moisture resistance. Fair protection against very mild concentrations of most organic and inorganic
acids. Exhibits poor caustic and solvent resistance. Due to poor coating and drying time characteristics, Twin City
Fan & Blower DOES NOT recommend the use of asphaltum coating for fans.
Enamel Coatings
Enamel offers a quick dry time, high gloss, and good color and gloss retention. For long term corrosion protection,
a primer is recommended.
Epoxy / Epoxy Phenolic Coatings
Offers longer service life than conventional paint against mild acid of caustic solvent. Their resistant characteristics
are similar to phenolic. Four different epoxy systems are shown in the chart.
Epoxy Mastic Coatings
Excellent chemical resistance to splash/spillage, fumes, high humidity and moisture. Self-priming and suitable over
most existing coatings and tightly adherent to rust.
Flouropolymer Resin (PVDF) Coatings
Thermoplastic coatings used as excellent corrosion barriers. They are specified because of their unique properties:
unaffected by sunlight, most chemicals and solvents, abrasion resistance, mechanical strength and toughness.
High Temp Aluminum Coatings
Heat-resistant coating with good corrosion resistance and thermal stability for temperature over 500°F.
Phenolic Coatings
These are widely used as a fan coatings for a variety of applications. Good resistance to high concentrations of
organic or inorganic acids with the exception of strong oxidizing agents, i.e., nitric and chromic. Resistant to only
low concentrated alkalis, but excellent solvent resistance. It is not recommended for hydrofluoric acid or hypochlorite
salts. Air dried phenolic will have shorter life than baked phenolic. Heresite baked phenolic is most effective while
handling dust and explosive gases.
Polyester Powder Coatings
TGIC powder coating offers good exterior durability, mineral acid resistance and hard films. Good humidity and salt
resistance.
Polyester Synthetic Resin Coatings
Low cost and adequate resistance to severe acidic and alkaline conditions makes this coating popular. Widely used
for evaporative cooling and other air conditioning equipment.
PFA Flouropolymer Coatings
PFA has excellent release properties, low coefficient of friction, withstands temperatures of up to 500°F, and it is a
melt flow nonporous film that offers excellent corrosion protection. PFA is an excellent choice for a wide variety of
uses, especially those involving chemical resistance.
Vinyl Coating
All vinyls listed in the chart are thermoplastic material. Generally resistant to most organic and inorganic acids with
fair concentrations and low temperature.
Zinc Coatings
Hot-dipped galvanizing of large fans is not physically practical. Cold zinc coating applied as a spray is said to have
better corrosion resistance than hot-dip galvanizing, and offers high impact resistance.
OTHER COATINGS AVAILABLE
UPON REQUEST FROM TWIN CITY FAN & BLOWER
Color-match Enamel
Teflon (PFA)
Kynor/Dykor (PVDF)
Powder Polyester
Twin ciTy fan & blower | www.Tcf.com
5959 Trenton Lane N | Minneapolis, MN 55442 | Phone: 763-551-7600 | Fax: 763-551-7601