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Moving Beyond the 25-Year Coating

Over the past 40 years, three-coat systems consisting of zinc-rich primer, epoxy intermediate and polyurethane topcoat (ZEU) have been the preferred coating system for steel bridge structures in highly corrosive environments due to their proven performance and cost effectiveness.1-6 Each layer serves a different function: galvanic protection is supplied by the zinc-rich primer, while the epoxy intermediate coat provides barrier to water and salts, and the polyurethane topcoat resists against ultraviolet degradation, abrasion, and chemicals.

Product Number: 51218-138-SG
Author: Hank Bernacki, Zhenwen Fu, Bingquan Li, Denise Lindenmuth & Leo Procopio
Publication Date: 2018
Industry: Coatings
$0.00
$20.00
$20.00

Over the past 40 years, three-coat systems consisting of zinc-rich primer, epoxy intermediate and polyurethane topcoat (ZEU) have been the preferred coating system for steel bridge structures in highly corrosive environments due to their proven performance and cost effectiveness.1-6 Each layer serves a different function: galvanic protection is supplied by the zinc-rich primer, while the epoxy intermediate coat provides barrier to water and salts, and the polyurethane topcoat resists against ultraviolet degradation, abrasion, and chemicals.

Over the past 40 years, three-coat systems consisting of zinc-rich primer, epoxy intermediate and polyurethane topcoat (ZEU) have been the preferred coating system for steel bridge structures in highly corrosive environments due to their proven performance and cost effectiveness.1-6 Each layer serves a different function: galvanic protection is supplied by the zinc-rich primer, while the epoxy intermediate coat provides barrier to water and salts, and the polyurethane topcoat resists against ultraviolet degradation, abrasion, and chemicals.

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