Seems to be dangerous cap. No overpressure fuse?

Inge


----- Original Message ----- 
From: "Douglas Pauls" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, March 17, 2011 1:31 PM
Subject: Re: [TN] Hydrogen gas analysis


> Thank you Inge,
> Yes, Oneida first came to mind as they do an excellent job for Rockwell
> when we need RGA analysis, but they said the presence of liquid would foul
> their analysis.
>
> Doug Pauls
>
>
>
> Inge Hernefjord <[log in to unmask]>
> 03/17/2011 04:23 PM
>
> To
> TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
> cc
>
> Subject
> Re: [TN] Hydrogen gas analysis
>
>
>
>
>
>
> Hi Dough,
>
> why does he ask? Of course it's >H2 or ions of H. There are numbers of
> sniffers, e.g. this one:
>
> http://www.makelengineering.com/dir/Technologies/Hydrogen%20Detection/Hydrogen.htm
>
> to determine percentage is probably tricky. We use Oneida N.Y.C. As far as
> I remember, they can determine %age by anticipate bal > H2.
> I'm not a chemical guy myself.
>
>
>
> On 17 March 2011 09:09, Douglas Pauls <[log in to unmask]> wrote:
> Good morning all,
>
> I am posting this question for a colleague (not Hillman).
>
> Take a look at this picture which Steve has graciously posted on his web
> page.
>
> http://stevezeva.homestead.com/Bowed_Electrolytic.jpg
>
> This is an electrolytic capacitor and I don't have any access to the
> processing history.  Presumably it went through reflow.  My colleague
> would like to determine if there is hydrogen in this swelled device and if
> so, what percentage.  There is presumably both liquid and gas inside the
> swelled area which would complicate any standard residual gas analysis.
> Hydrogen is too light for GCMS detection.
>
> OK all you chemists, how would hydrogen presence and concentration be
> determined here? And do you know of any commercial labs which would
> perform that service?
>
> Doug Pauls
> Rockwell Collins
>
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