Yes, I imagined that it would readily escape the lattice. On Wed, Jan 20, 2016 at 9:08 AM, Teslaalset <[email protected]> wrote:
> Bob, forming of molecular Hydrogen is indeed often mentioned by > embrittlement experts, but imagine what would happen when sufficient UDH > inside metal lattices would be activated. > > On Wed, Jan 20, 2016 at 4:44 PM, Bob Higgins <[email protected]> > wrote: > >> My understanding of at least the conventional thinking of hydrogen >> embrittlement of irons has to do with internal dislocations and vacancies >> in the iron. The hydrogen can penetrated iron in its neutral monatomic >> form but cannot as H2. When the hydrogen gets loaded into the iron as a >> monatomic species and encounters a void/dislocation/vacancy, it may hang >> around in there long enough for it to encounter another monatomic hydrogen >> and then it forms an H2 molecule. The H2 molecule cannot escape. >> Eventually more and more H2 molecules are formed in the void and it becomes >> high pressure, putting a great deal of stress on the lattice causing the >> embrittlement. >> >> In the UHD form, the hydrogen would simply escape from the void; and >> thus, UHD would seem to be counter to that which I think of as >> embrittlement of iron. >> >> Also, keep in mind that most FexOy catalysts are formed as fine oxide (+ >> alkali) particles that are agglomerated into a larger, but highly porous >> body. These are not like rust on an iron slug. The whole idea is for H2 >> to be able to breathe through the material. >> >
