Diffusion barriers for preventing high temperature hydrogen...

B - Operations – Transporting – 05 – D

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B05D 3/02 (2006.01) B01J 19/02 (2006.01) C23C 26/00 (2006.01)

Patent

CA 2229655

A method of protecting carbon and low-alloy steels from high temperature hydrogen attack. A carbon or low-alloy steel portion of a reactor system that is to be contacted with high pressure hydrogen at elevated temperatures is provided with an intermetallic, diffusion barrier layer that reduces the rate of hydrogen attack at least ten-fold compared to the steel portion without the diffusion barrier layer.

L'invention concerne un procédé pour protéger les aciers au carbone et les aciers faiblement alliés contre l'attaque par l'hydrogène à haute température. Une partie d'un système de réacteur en acier au carbone ou en acier faiblement allié, susceptible d'entrer en contact avec de l'hydrogène à haute pression, à des températures élevées, est pourvue d'une barrière anti-diffusion intermétallique qui réduit le degré de l'attaque par l'hydrogène d'au moins 10 fois, par rapport à la partie en acier sans barrière anti-diffusion.

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