Super High Build Epoxy Resin Coating System for Offshore Steel Structures

Abstract Coal tar epoxy have been widely used to protect immersed maritime steel structures against corrosion conventionally. But the tar epoxy coating is restricted for use in the future due to environmental concerns. A new generation of super high build epoxy is expected to provide prolong life time and maintenance-free coatings. In this paper, super high build epoxy resin coating was evaluated with laboratory performance tests, such as impact resistance test, water vapor permeability test, cathodic disbondment test, thermal gradient test, salt spray test and seawater exposure corrosion test and compared to tar epoxy resin coating according to the standard tests for offshore structures, especially regarding the service areas for tidal, splash and submerged zone. In conclusion, anti-corrosive properties and durability of the super high build epoxy resin coating were excellent compared with tar epoxy resin coating.