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October 2002

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Subject:
From:
Guy Ramsey <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 29 Oct 2002 13:56:07 -0500
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It is a significant advantage in electronics.

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
> Sent: Tuesday, October 29, 2002 12:13 PM
> To: [log in to unmask]
> Subject: Re: [TN] Nitrogen drying?
>
>
> Why N2? You would get exactly the same effect with dry air.
> However, be
> warned: if the air or nitrogen becomes humid, you will reach
> an equilibrium state between the parts and the air or gas,
> not perfect dryness. You will need several successive
> "rinses" of dry gas to achieve low levels and probably
> storage in large volumes, compared with the volume of the
> parts. The only advantage of N2 over air is if you wish to
> avoid an oxygen reaction, such as oxidation of reactive
> metals, and this has damn-all to do with moisture (well, almost :-) ).
>
> Brian
>
> Gregg Klawson wrote:
> > Hello Technet,
> >
> > A question came up this morning as to whether nitrogen
> could be used
> > as a drying agent for PWBs, components, etc.  I know
> nitrogen is used
> > as a fill gas for dry boxes, bags and to provide a dry
> atmosphere for
> > component testing.  I don't have a feel for the physics of using
> > nitrogen to dry something out.  We have a situation where baking at
> > high temperatures may not be practical but immersion in a nitrogen
> > atmosphere is.  Any ideas, references would be appreciated.
> >
> > Thanks,
> > Gregg
> >
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