I have seen FR assemblies with transformer/toroid's that exhibit some form of oxide formation at the openings where the wires come out from the enclosures.   At some point I felt that these particles could be conductive.   I imagine that all sorts of material can be used to enclose these components.   Needs more research.

Victor,

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
Sent: Wednesday, June 03, 2015 12:00 PM
To: [log in to unmask]
Subject: Re: [TN] Transformers and Toroid's

Nope. I am talking about the actual surface mount and through-hole transformers that go on circuit boards, not the transformers that hang on poles outside your house. Nor am I talking about futuristic cars that transform into Autobots or Decepticons.

I want to know what the darn things are made of that could be supplying the high levels of ionic material I see in my IC extractions.


Doug Pauls
Principal Materials and Process Engineer Rockwell Collins

On Wed, Jun 3, 2015 at 11:20 AM, wrote:

> you mean degraded transformer oil or dielectric fluid?
> http://en.wikipedia.org/wiki/Transformer_oil_testing
>
> >
> Good morning all,
> >
> > I am doing some background research on residues you get from
> > transformers and toroid components in an IC extraction.
> > Unfortunately, I don't know much about how such components are manufactured or the materials used.
> Do
> > any of you know of a good tutorial or overview on such
> > materials/processes that is available on the Net?
> >
> > Doug Pauls
> > Principal Materials and Process Engineer Rockwell Collins
> >
> >
> > ____________________________________________________________________
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>
>


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