Greenheck Fan Mixed Flow Fans Belt and Direct Drive QEI-L - Manual (Page 9)

99
Zinc Advantage
Optional Two-coat
Paint System
In 1972, Greenheck took the lead as the first commercial and industrial fan manufacturer to introduce
electrostatic powder coatings. Today, Greenheck continues to lead by being the first to offer a superior zinc-rich
powder basecoat and powder coating finish.
This zinc-rich basecoat technology is used extensively outside the HVAC industry to protect bridge beams,
automotive components and other heavy-gauge steel products. Now, this advanced technology is available on
Greenheck welded steel products.
Greenheck’s coating process starts with a minimum of five wash stages to treat all components prior to
painting. Cleaner parts result in better coating adhesion and durability. We then use an advanced two-coat
powder application method that includes a basecoat of zinc-rich powder and a topcoat of Greenheck’s
Permatector™ or Hi-Pro Polyester. The combination of these two topcoats over the zinc-rich basecoat results
in the two-coatings, Perma-Z and Hi-Pro-Z. These oven-cured coatings provide superior corrosion resistance
along with a tough, uniform finish to combat the most extreme conditions.
When compared to a traditional single coat
application, the benefits of the two-coat
system include:
• An automatic powder coat application
that produces uniform coverage and
unmatched paint quality.
• A double coat thickness that provides
superior durability and protection from
air and water.
• A zinc-rich basecoat that includes
an epoxy component that provides
additional corrosion protection.
• A zinc-rich basecoat that provides
chemical protection of exposed steel
to prevent corrosion.
Topcoat
2-3 mils
Base Steel
Standard
Surface Preparation
4-6 mils Total
Zinc-rich Primer
(70% zinc)
Topcoat
Base Steel
Advanced
Surface Preparation
The protection offered by the zinc-rich basecoats in
Perma-Z and Hi-Pro-Z result in extraordinary corrosion
resistance. Test data demonstrates our two-coat paint
system offers three (Perma-Z) and four (Hi-Pro-Z) times
the corrosion resistance of other coatings commonly
available within the fan industry. See table for salt spray
life for various coatings.
Coating fans with Perma-Z or Hi-Pro-Z has reduced our
customers annual paint maintenance costs by three to
four times!
For more information, see Greenheck’s Coatings for
Extreme Applications catalog, available online at
www.greenheck.com
One Coat Process
Two-coat Process
Salt Spray ASTM B117
Hours 1000 2000 3000 4000
Permatector™
Hi-Pro Poly
Perma-Z
Hi-Pro-Z
Baked Phenolic
Epoxy Phenolic
Fluorocarbon
Salt Spray ASTM B117 is a comparative test
that indicates the corrosion resistance of
powder paint coatings.