Cut Sheet

Metal Framing Channels — Overview
D-4
Metal Framing, Pipe Hangers and Accessories
“Soak Degreasing”
Chemical solution
removes bulk of oil
and grease buildup.
“Electro Cleaner”
The metal is
negatively charged
to remove minute
surface particles.
“Rinse”
Live, clear water rinse.
“Sulfuric Acid Bath”
Prepares the metal by
etching the surface for
the zinc application.
“Rinse”
Live, clear water rinse.
“Zinc Tank”
Electrically applies the
zinc metal coating.
“Rinse”
Chemically treated
rinse water.
“Rinse”
Live, clear water rinse.
“Rinse”
Live, clear water rinse.
“Chromate Dip”
A yellow dichromate
conversion coat is applied
to the zinc.
“Rinse”
Live, clear water rinse.
“Dryer”
Hot air is forced
around strut until dry.
GoldGalv
®
The standard GoldGalv
®
finish is made up of a
multi-step electrogalvanizing and zinc dichromate
process. The trivalent Chromium finish is applied
over the zinc, producing a chemically bonded
non-porous barrier for protection from moisture
and air. The .5 mil electro-plated zinc and gold
trivalent Chromium finish provide all of the
features and protection of hexavalent Chromium
without the use of the chemical.
(Refer to page D-5 for more details).
Formed Hot Rolled Steel
Electro-Plated
Zinc Coating
Yellow Dichromate
Conversion Coat
Finishes (continued)