Hydrogen is gaining momentum as the centerpiece of clean energy initiatives in many countries and may hold the key to the inevitable and needed transition from fossil fuels to renewable energy. It is estimated by various sources that the global economic impact would be about $1T (one trillion dollars) by the year 2035. Hydrogen can be extracted from natural gas and other fossil fuels commonly known as “blue” hydrogen, or from renewable energy sources or from water by electrolysis, termed “green” hydrogen.

The known deleterious effects of H2 on high strength pipeline steel (embrittlement, decrease in ductility, acceleration of fatigue crack growth, etc.) makes it a potential challenge for economic and safe transportation of hydrogen gas from the production source to the end user.

This study presents the test protocol designed to investigate if internal coatings can help mitigate the deleterious interaction between pipeline steel and hydrogen. Test results of six coating systems vs bare (uncoated) metal are presented and discussed based on their impact on mechanical properties of X-80 pipeline steel (yield strength, ultimate tensile strength, % elongation, and % reduction of area).

Subject
Embrittlement, Liquid coatings, Coatings, Sand, Pipelines, Tensile tests, Fusion bonded epoxy coating, Glass flake coatings, Powder coatings, Elongation, Steel, Coating systems, Hydrogen
Keywords:
Gas Pipelines, Coatings, Hydrogen Embrittlement (HE), API X-80 steel
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2022
Association for Materials Protection and Performance (AMPP)
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