[wildcard_redneck]

Hydrogen is a tricky gas to use as fuel for cars that the supposed to last decades. The reason is the hydrogen likes to leak out through materials because the atoms are small enough to slip between the atoms of the container container material and by that fact causes hydrogen embrittlement.

Hydrogen embrittlement (HE), also known as hydrogen-assisted cracking or hydrogen-induced cracking (HIC), is a reduction in the ductility of a metal due to absorbed hydrogen. Hydrogen atoms are small and can permeate solid metals. Once absorbed, hydrogen lowers the stress required for cracks in the metal to initiate and propagate, resulting in embrittlement. Hydrogen embrittlement occurs most notably in steels, as well as in iron, nickel, titanium, cobalt, and their alloys. Copper, aluminium, and stainless steels are less susceptible to hydrogen embrittlement.

[Gene Eric]

>> hydrogen likes to leak out through materials

Would that be the case when liquified, moving through a channel, and then finally expanded into the combustion chamber?