Several operators in the Oil&Gas industry have good experience with the use of glass flake reinforced polyester (GFP) coatings, however, limited information of documented long-term performance can be found in the open literature. During decommissioning of an aged Oil&Gas installation, a visual inspection was carried out at a decommissioning yard and a brace cut out from the splash zone of the jacket structure was examined in laboratory. The examination has included visual inspection, inspection in microscope, adhesion testing and EIS measurements. The durability and service life of GFP coating in offshore splash zone environment have in this work been documented to be good after 25-30 years exposure without any maintenance.

Based on experience from Oil&Gas industry, it may in future update of design codes for offshore wind foundation structures be considered to explicitly define a higher coating design useful life and a lower corrosion allowance in splash zone for GFP coated structures.

Subject
Steel structures, Primers, Coating performance, Coating inspection, Coatings, Offshore structures, Industries, Mechanical damage, Splash zone, Glass flake coatings, Wind, Jackets, Coating systems
Keywords:
coating, splash zone, glass flake polyester, inspection structure, adhesion test, impedance
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2023
Association for Materials Protection and Performance (AMPP)
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