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Bridge Coating Maintenance Strategies

Bridge Coating Maintenance Strategies
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When it comes to a bridge structure with a serviceable Organic Zinc / Epoxy / Urethane (OZ/E/U) coating system, there is no golden answer on the most cost-effective maintenance painting strategy. Depending on the severity and amount of corrosion and coating breakdown on the structure, planned maintenance surface preparations range from spot power tool cleaning and spot painting to a full SSPC-SP 10 media blast and full recoating operation. 

Product Number: 51322-18061-SG
Author: Eric Shoyer, Nick Fabritiis, Pete Ault, Peter McDonagh
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings
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$20.00
$20.00

Choosing the proper maintenance strategy when scoping a coatings project is difficult, and potentially costly if incorrect procedures are utilized. This is especially true for steel bridges with millions of square feet of coated surface to be repaired and coated. For the last 30 years, bridge coating maintenance has been dominated by the desire to remove lead coatings from existing structures, followed by the application of Zinc/Epoxy/Urethane or other modern coatings systems. These modern coating systems are now reaching the age where major maintenance is required, and the decision must be made regarding how much coating to retain, and what methods will be used to clean and paint. This paper presents results of field and laboratory testing of alternative approaches to maintaining an Organic Zinc/Epoxy/Urethane bridge coatings system. 

Choosing the proper maintenance strategy when scoping a coatings project is difficult, and potentially costly if incorrect procedures are utilized. This is especially true for steel bridges with millions of square feet of coated surface to be repaired and coated. For the last 30 years, bridge coating maintenance has been dominated by the desire to remove lead coatings from existing structures, followed by the application of Zinc/Epoxy/Urethane or other modern coatings systems. These modern coating systems are now reaching the age where major maintenance is required, and the decision must be made regarding how much coating to retain, and what methods will be used to clean and paint. This paper presents results of field and laboratory testing of alternative approaches to maintaining an Organic Zinc/Epoxy/Urethane bridge coatings system. 

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