New Developments in Coatings for Extended Lifetime for Offshore Wind Structures

Jakob Mølholm, Claus Erik Weinell, Troels Mathiesen, Peter Nielsen, Anders Black

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

Abstract

After more than 15 years’ service life of the first large offshore wind farms in the North Sea, mostly positive experiences are reported regarding the condition of the protective coating systems. Today however, the requirements for corrosion protection for new projects are often extended to at least 25 years’ maintenance-free lifetime. In comparison, the highest durability class described in ISO 12944 is more than 15 years until first expected maintenance. Therefore, much needed committee work is in progress with the intent to update ISO 12944 with extended durability classes. In order to bring down the construction cost of the support structures for offshore wind, initiatives have been taken to industrialize the coating application process and to use standard components wherever possible. Extended pre-qualification tests are needed in order to convince owners and certifiers that new coating systems may actually have 25 years’ maintenance-free lifetime. The chosen coating breakdown factor for the design of cathodic protection is another focus area, since less conservatism in the design may reduce the cost for cathodic protection. The paper discusses the need for more documentation on coating systems for extended lifetime and the possibilities of reducing the costs for corrosion protection. Valuable information from decommissioning of old wind farm structures may provide crucial information and documentation.
Original languageEnglish
Publication date2017
Number of pages1
Publication statusPublished - 2017
Externally publishedYes
EventNACE Corrosion 2017: Conference & Expo - New Orleans, United States
Duration: 26 Mar 201730 Mar 2017

Conference

ConferenceNACE Corrosion 2017: Conference & Expo
Country/TerritoryUnited States
CityNew Orleans
Period26/03/201730/03/2017

Keywords

  • Offshore Wind
  • Marine Corrosion
  • Protective Coatings
  • Coating Breakdown Factor
  • Decommissioning (nuclear reactors)

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