I recommend that you read through ASTM D3359 "Methods for Measuring   
Adhesion by Tape Test"  and a recent CRADA report "Evaluation of   
Low-Residue Soldering for Military and Commercial Applications: A Report   
from the Low-Residue Soldering Task Force".

The CRADA study included coating adhesion evaluation using ASTM D3359   
like tape adhesion tests on MIL-I-46058C coupons.  There is a good   
description of the test, the sample conditioning and some of the pitfalls   
of the test.

Experience is needed to get consistent cut and peel-by-tape testing.   
 Every cut has to be made with a good sharp blade.  An experienced   
operator examines his blade often under magnification and replaces it at   
the first sign of wear.  Also, he/she is able to apply consistent   
pressure on each cut.


Mary Davis
Sr. Material & Process Engineer
Alliant Techsystems
206-356-3311
[log in to unmask]
 ----------
From:  Yuen, Mike[SMTP:[log in to unmask]]
Sent:  Thursday, November 21, 1996 7:04 PM
To:  [log in to unmask]
Subject:  ASY: Conformal Coating Adhesion Testing



I need any information of how to test the adhesion of silicone conformal
coatings.  I have heard about performing tape tests, but I would like   
more
information.  Currently, we are using Dow Corning 1-2577 and 3-1765.  Any   

help would be appreciated.

Heather Benedict
Process Engineer
414-751-5490

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