3 ms·
Not just any opening: just about any microscopic crack would let it out and most non-metal materials are effectively porous when trying to contain helium under
by akiselev 8y ago
Not just any opening: just about any microscopic crack would let it out and most non-metal materials are effectively porous when trying to contain helium under pressure. It's even used to detect leaks in high vacuum chambers.
- Pulcinella 8y agoYou don’t even need cracks. Helium (and hydrogen) can diffuse through metal, especially at high temperatures. Hydrogen embrittlement is a problem for processes that use high temp hiydrogen like the Haber process.
- DoctorOetker 8y agohow is it typically dealt with? regular annealing?
- Pulcinella 8y agoI’m not sure about in modern processes, but Bosch’s original solution for the Haber-Bosch industrial process was to just periodical replace an expendable steel liner in the reaction vessel.