M
Michael Press
Guest
In article <[email protected]>,
jim beam <[email protected]> wrote:
> Michael Press wrote:
> > In article <[email protected]>,
> > jim beam <[email protected]> wrote:
> >
> >> Michael Press wrote:
> >>> In article <[email protected]>,
> >>> jim beam <[email protected]> wrote:
> >>>
> >>>> Michael Press wrote:
> >>>>> In article
> >>>>> <675a6a87-097d-4d19-b681-2318db1331d9@y38g2000hsy.googlegroups.com>,
> >>>>> [email protected] wrote:
> >>>>>
> >>>>>> On Apr 25, 9:31 am, jim beam <[email protected]> wrote:
> >>>>>>> jobst, let's get this straight. you have made a series of fundamental
> >>>>>>> errors, which while not apparent to the layperson, are just ridiculous
> >>>>>>> from anyone purporting to be an engineer.
> >>>>>> And yet, the majority of engineers posting here tend to agree with
> >>>>>> Jobst and disagree with jim beam - who, of course, is not an engineer,
> >>>>>> and lacks the background to understand much of the discussions anyway.
> >>>>>>
> >>>>>>> ... not only do you defend
> >>>>>>> these mistakes, you do so with abusive derision!!!
> >>>>>> This is so far beyond "the pot calling the kettle black" that
> >>>>>> it's hilarious!
> >>>>>>
> >>>>>>
> >>>>>>> a dye penetrant test does not determine a cause of cracking. a spoke
> >>>>>>> tension gauge needs to account for spoke thickness....
> >>>>>> Welds cannot be designed to resist tension? No bicycle parts are
> >>>>>> cast? Profanity is essential in a technical discussion?
> >>>>> H2 is much larger than He.
> >>>>>
> >>>> in the chosen world of michael press. because he gets to exclude facts
> >>>> that don't suit him!
> >>> You misspelled my name.
> >> no i didn't!
> >
> > Denial in the face of incontrovertible evidence.
> >
> >>> You cannot support the claim about the relative sizes of H2 and He.
> >> and you're retreating to the last argument you lost? that's not too smart.
> >
> > Winning and losing? H2 and He molecules are the same size.
> > Their van der Waals b parameters are 2.65e-5 and 2.34e-5 m^3/mole
> > respectively. Nothing like much larger as you said.
> >
>
> so that's why they have different diffusion rates??? tell me, what are
> the diffusion rates for both through rubber and through steel? that's
> public data. cite and explain.
Diffusion of H2 into steel involves chemical transformation.
This is hydrogen embrittlement as you very well know since
you have cited hydrogen embrittlement yourself. You are being
misleading. He is inert with regard to steel. This is
sufficient to induce a wide difference in diffusion rates.
What are the rates through butyl rubber? What are the
absorbtion properties of butyl rubber and H2? The absorbtion
properties have great effect on diffusion. CO2 is larger and
heavier than O2 an N2, yet it diffuses through butyl rubber
faster than O2 and N2, so diffusion rates cannot be used to
make reliable estimates of relative size.
--
Michael Press
jim beam <[email protected]> wrote:
> Michael Press wrote:
> > In article <[email protected]>,
> > jim beam <[email protected]> wrote:
> >
> >> Michael Press wrote:
> >>> In article <[email protected]>,
> >>> jim beam <[email protected]> wrote:
> >>>
> >>>> Michael Press wrote:
> >>>>> In article
> >>>>> <675a6a87-097d-4d19-b681-2318db1331d9@y38g2000hsy.googlegroups.com>,
> >>>>> [email protected] wrote:
> >>>>>
> >>>>>> On Apr 25, 9:31 am, jim beam <[email protected]> wrote:
> >>>>>>> jobst, let's get this straight. you have made a series of fundamental
> >>>>>>> errors, which while not apparent to the layperson, are just ridiculous
> >>>>>>> from anyone purporting to be an engineer.
> >>>>>> And yet, the majority of engineers posting here tend to agree with
> >>>>>> Jobst and disagree with jim beam - who, of course, is not an engineer,
> >>>>>> and lacks the background to understand much of the discussions anyway.
> >>>>>>
> >>>>>>> ... not only do you defend
> >>>>>>> these mistakes, you do so with abusive derision!!!
> >>>>>> This is so far beyond "the pot calling the kettle black" that
> >>>>>> it's hilarious!
> >>>>>>
> >>>>>>
> >>>>>>> a dye penetrant test does not determine a cause of cracking. a spoke
> >>>>>>> tension gauge needs to account for spoke thickness....
> >>>>>> Welds cannot be designed to resist tension? No bicycle parts are
> >>>>>> cast? Profanity is essential in a technical discussion?
> >>>>> H2 is much larger than He.
> >>>>>
> >>>> in the chosen world of michael press. because he gets to exclude facts
> >>>> that don't suit him!
> >>> You misspelled my name.
> >> no i didn't!
> >
> > Denial in the face of incontrovertible evidence.
> >
> >>> You cannot support the claim about the relative sizes of H2 and He.
> >> and you're retreating to the last argument you lost? that's not too smart.
> >
> > Winning and losing? H2 and He molecules are the same size.
> > Their van der Waals b parameters are 2.65e-5 and 2.34e-5 m^3/mole
> > respectively. Nothing like much larger as you said.
> >
>
> so that's why they have different diffusion rates??? tell me, what are
> the diffusion rates for both through rubber and through steel? that's
> public data. cite and explain.
Diffusion of H2 into steel involves chemical transformation.
This is hydrogen embrittlement as you very well know since
you have cited hydrogen embrittlement yourself. You are being
misleading. He is inert with regard to steel. This is
sufficient to induce a wide difference in diffusion rates.
What are the rates through butyl rubber? What are the
absorbtion properties of butyl rubber and H2? The absorbtion
properties have great effect on diffusion. CO2 is larger and
heavier than O2 an N2, yet it diffuses through butyl rubber
faster than O2 and N2, so diffusion rates cannot be used to
make reliable estimates of relative size.
--
Michael Press