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Pipe Straps, Conduit Clamps
& Hangers (Series 700)
GoldGalv
®
Outperforms Copper Plated
In a test conforming to
ASTM G-87-84, also known as
the Kesternich Test, Superstrut’s
GoldGalv
®
electrogalvanized
zinc dichromate finish achieved
superior corrosion resistance in
comparison to copper plated.
Performed and certified by an
independent testing laboratory,
the stringent Kesternich test is
equivalent to an acid rain
environment. The test procedure
exposes subject material to
condensed moisture containing
harsh sulfur dioxide (S0
2
) which accelerates the aging process.
During the series of test time cycles, the material is thoroughly
inspected for signs and progression of damaging red rust.
The first test series conducted included various light-duty adjustable
clevis hangers assembled to copper tubing. The GoldGalv
®
finish
exhibited five times the red rust resistance as compared to
copper plated.
The second test series was performed on various O.D. pipe straps
attached to copper tubing and continuous slot channel. GoldGalv
®
achieved greater red dust resistance by seven times over
copper plating.
Once tests were completed, all copper tubes were split open and
inspected for signs of electrolysis. The copper tubes showed minimal
deterioration as a result of the test and no indication of electrolysis
occurrence when attached to material with GoldGalv
®
finish.
ASTM G-87-84 Corrosion Test Results
Initial 50% 100%
Finish Red Rust Red Rust Red Rust
Test Series I: Light-Duty Adjustable Clevis Hanger
GoldGalv 120 Hours 216 Hours *Never obtained
Copper Plated 24 Hours 48 Hours 72 Hours
Initial 50% 100%
Finish Red Rust Red Rust Red Rust
Test Series II: O.D. Pipe Straps
GoldGalv 168 Hours 192 Hours 240 Hours
Copper Plated 24 Hours 48 Hours 168 Hours
*Test series ended after 360 hours.
Standard Finish – GoldGalv
®
, unless otherwise stated.
GM17_steelcity_cat_B_38-49 3/23/07 1:05 PM Page B49