Am 27.11.2011 17:24, schrieb Jeff Sutton:
A friend of mine who was working on LENR in the past noted that
Stainless Steel containers become quite porous to Hydrogen at around
800 C.
This being the case, would this not limit Rossi's temperature gradient
from reactor, through its container, lead, and then surrounding water.
As in all(?) public tests he shuts the Hydrogen supply valve, so no
new Hydrogen is supplied, any leakage would tend to limit the reaction.
Thoughts?
http://www.azom.com/article.aspx?ArticleID=1175
Look to chapter "structural stability".
There are many different types of stainless steel and those with low
carbon content are stable only below 400°. 870° is the highest
temperature they mention in this article for "H" grade steels and so
this should indeed be a theoretical upper limit, independent from
hydrogen diffusion.
Diffusion rates are commonly quite low, these are measured in µg per
squaremeter.
If there is more diffusion, the material is possibly cracked.
The losses could be compensateted by a constant pressure hydrogen supply.
So I dont think, diffusion rate is a limit. Remember, for hydrogen
purification they have use µm thick foils. If thicker and cheaper
material worked at 800°, they would use this.
Peter
