Hello TechNet,

	Here at the EMPF, we have a project which is addressing this very subject.  In our case, however, we are applying a DC bias to the test pattern while taking Impedance Spectroscopy measurements.  So far, we are getting some good results, but haven't put anything into the Humidity chamber yet.  We can however, measure the corrosion rate on the test patter.

	If anyone would like to get more information on this, drop me a line, or stop by Technical Session 30 at NEPCON West 97, where I will be presenting our results to date.

John Guy
American Competitiveness Institute (EMPF)
317-655-3673 x130
[log in to unmask]


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From: 	[log in to unmask][SMTP:[log in to unmask]]
Sent: 	Tuesday, December 03, 1996 2:43 PM
To: 	[log in to unmask]
Subject: 	Impedance Spectroscopy

Good afternoon all.

I had a discussion this morning with a customer regarding the relative merits
of DC-based SIR testing vs. the newer impedance spectroscopy, which is
AC-based.  I know of it and the basic operating theory, but not much more.
 Is there anyone in the TechNet crowd who has started to use impedance
spectroscopy as a research or production tool? Or more to the point, willing
to share information on this new tool?  I think it is an exciting concept.
Thanks for any input.

Doug Pauls
CSL

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