This paper provides the first report of a means to harvest energy from stray cathodic protection currents in marine structures and thereby continuously power wireless sensors. This method is distinct from previously reported methods which utilise a conventional anode–cathode arrangement in open seawater to create a voltage cell. The underlying theory, modelling, and experimental results are described for implementation on a real application, namely annulus monitoring in a subsea production well. A broad range of new applications is envisaged, including self-powered and lifetime monitoring of safety critical parameters on marine structures, including wind turbines.

Original languageEnglish
Article number119133
JournalApplied Energy
Early online date21 Apr 2022
Publication statusPublished - 15 Jun 2022

Bibliographical note

Funding Information:
The authors are thankful to Metrol Technology Group for their support in provision of materials, facilities and the data set required to verify the concept.


  • Annulus monitoring
  • Cathodic protection
  • Downhole
  • Energy harvesting
  • Offshore
  • Subsea

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering
  • Energy(all)
  • Management, Monitoring, Policy and Law


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