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In the
mid-1990s, due to its toxicity,
red lead paste was being phased
out as an anti-corrosive for suspension
bridge main cables, after more
than a century as the standard
for this demanding application.
To meet the need for a red lead
replacement to protect one of
the oldest vehicular suspension
bridges still in use, engineers
turned to the specialists at Grignard
Company. |
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| The engineers needed
an anti-corrosion paste that met
a range of objectives, including: |
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Easy-to-apply
one-pack system, requiring
no premixing |
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Non-toxic,
non-flammable, with no solvents |
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Resistant
to drying out or cracking |
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Compatible
with paints in use and existing
red lead |
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| At the time, no
product existed on the market
that met all of these requirements. |
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Grignard
chemists painstakingly developed
and evaluated more than 70 proprietary
formulations. The result of this
process was Grikote Z Complex
2C, an innovative anti-corrosion
paste that met or exceeded all
performance, environmental, and
health and safety requirements.
Following
successful independent testing—including
extreme drying and salt spray
exposure—Grikote Z Complex
2C was accepted for use on the
historic bridge. Grignard’s
innovative, non-toxic anti-corrosion
solution has since been selected
for use on many other bridges
and today protects suspension
bridges around the world, both
old and new, including: |
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Bear
Mountain Bridge, New York |
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Ben
Franklin Bridge, New Jersey-Pennsylvania |
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Wheeling
Suspension Bridge, West
Virginia |
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Kwang
Ahn Bridge, South Korea |
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Hadong
Namhae Bridge, South Korea |
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Oakland
Bay Bridge, California |
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Severn
Bridge, United Kingdom |
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Mackinac
Bridge, U.S.-Canada |
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Thousand
Islands Bridge, U.S.-Canada |
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Ambassador
Bridge, Michigan |
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Mount
Hope Bridge, Rhode Island |
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