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Enhanced understanding of degradation environments that develop at metal/non-metal interfaces for CCS environments

Project Code: 35264

Start date and planned duration: January 2023, 36 months



  • Further improve understanding of metallic/non-metallic interfaces that develop in high pressure CO2 environments using permeation and corrosion studies.
  • Determine corrosion testing methods/design options for reinforcement wires/chords.
  • Further develop and upgrade the 3-chamber film permeation cell to incorporate in-situ electrochemical corrosion measurements.
  • Develop an understanding of the environments that may develop locally at steel wire surfaces within thermoplastic composite pipes.
  • Quantify and monitor the corrosion kinetics of steel wires in-situ as local environments develop.


Project Outline

Thermoplastic composite pipes can be reinforced with steel, enabling extremely high pressure applications such as carbon capture, utilisation and storage (CCUS). However, the static environment which develops locally on the reinforcement wire is unknown and requires further research and study.

This project seeks to develop a system capable of (i) determining the species which permeate and their flux in order to develop an understanding of the environments which may develop and (ii) determine their influence on the corrosion behaviour on typical carbon steel and zinc coated carbon steel reinforcement wires.

This project will build on the capabilities on TWI’s recently designed and built 3-chamber permeation vessel by incorporating in-situ corrosion monitoring capabilities using electrochemical methods.


Industry Sectors

Oil and Gas

Renewable - Carbon Capture, Utilisation and Storage (CCUS)


Benefits to Industry

This technology could potentially be used outside of the scope of CCUS to investigate other polymer/metallic interfaces. This may include more traditional oil and gas related environments/products such as flexible risers and enhanced oil recovery. The research will provide information on the following;

  • Permeation and polymer performance data for each simulated CCS environments, i.e. Permeation data for each impurity/concentration and pressure/temperature condition.
  • Development work demonstrating the optimum method for the study of corrosion processes at polymer/metallic interfaces.
  • Corrosion performance data of coated (zinc coated) and non-coated carbon steel reinforcement chords or wires.
  • New and improved capability of polymer/metallic interface studies.



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