Hydrogen Permeation through the Oxide Layer - Phase 2

This project aims to address major gaps identified in NIA2_SGN0078, which conducted a thorough literature review of the international scientific and industry knowledge base. The work will focus on characterising the hydrogen permeability rate of API Grades X52 and X60 vintage pipelines and welds by analysing the microstructure of each sample, investigating the impact of internal corrosion layers, and conducting mechanical testing post-exposure.

A correlation exercise will also be conducted to equate gaseous charging with electrochemical charging. The outcome of this work targets an improved industry best-practice for permeation and fracture toughness tests, providing a validated benchmark framework with the potential to inform future updates of industry standards and procedures, and saving costs on any future material and permeation testing work.