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Abstract:All steel bridge systems and their components need some level
of corrosion protection to assure a serviceable life. One of two
approaches is typically used: either the bridge component is
fabricated from a corrosion-resistant alloy, or the steel is coated
for protection. The most common coating practice is use of a
multilayered paint system over a zinc-rich primer. Other coating
alternatives for corrosion protection are hot-dip zinc galvanization
and thermal spray coatings (TSC). Both galvanization and TSCs
offer better long-term corrosion protection than zinc-bearing
paint systems in severe environments. For this reason, these
alternative-coating systems need to be mainstreamed for the
protection of steel bridges.
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