diffusion
Materials
- Feb 28, 2008
- 4
Dear all:
I am currently in the process of setting-up simulations for retrofitting of a natural gas pipeline for hydrogen transport. The operating conditions will be 100 bar hydrogen pressure, temperature -50 to + 50 degrees Celsius.
Because of the embrittlement of stainless steel (e.g. 304, X-65) when exposed to high pressure hydrogen, an internal polymer lining is expected to be required. A well performing polymer lining will keep the hydrogen concentration at the stainless steel surface at a minimum (however this depends on the barrier properties and liner thickness, we assume that glass reinforced polyamide 11/12 will do the job rightly).
To describe the improvement in pipeline life in a quantitative manner, I am in search of a quantitative reference of ageing of stainless steel under the exposure of hydrogen at high pressures (the process itself is rather clear to me: hydrogen diffuses with a simultaneous chemical equilibrium reaction into the metal - example at url below - followed by surface Griffith like cracks).
Many thanks in advance!
Best Regards
I am currently in the process of setting-up simulations for retrofitting of a natural gas pipeline for hydrogen transport. The operating conditions will be 100 bar hydrogen pressure, temperature -50 to + 50 degrees Celsius.
Because of the embrittlement of stainless steel (e.g. 304, X-65) when exposed to high pressure hydrogen, an internal polymer lining is expected to be required. A well performing polymer lining will keep the hydrogen concentration at the stainless steel surface at a minimum (however this depends on the barrier properties and liner thickness, we assume that glass reinforced polyamide 11/12 will do the job rightly).
To describe the improvement in pipeline life in a quantitative manner, I am in search of a quantitative reference of ageing of stainless steel under the exposure of hydrogen at high pressures (the process itself is rather clear to me: hydrogen diffuses with a simultaneous chemical equilibrium reaction into the metal - example at url below - followed by surface Griffith like cracks).
Many thanks in advance!
Best Regards
