We are trying to qualify a no-clean flux to be used in our wave solder
process.
 
The flux in question is Indium #9942.
 
After wave soldering our boards are conformal coated with polyurethane
coating Conathane CE-1164. 
 
We have done some baking of a test sample at 70 degrees C and and have
tested per IPC-TM-650 2.6.7.1--thermal shock test.
 
This testing was done primarily to evaluate the adequacy of the adhesion
of the conformal coating.
 
We are interested in further evaluating this flux to determine if it
contributes to corrosion development or other undesirable effects.
 
We are considering "soaking" a sample in a chamber at 70 degrees C at
95% relative humidity for four or five days.
 
I am interested in any recommendations for further
testing--standards-related tests, nonstandards-related tests that may
reveal undesirable properties in the flux, etc.
 
Thanks

 

Kenneth Chafin 
Quality Compliance Leader 

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Telephone: +1-412-688.2400 Ext [Ext] 
Telefax: +1-412-688.2399 
www.ansaldo-sts.com <http://www.ansaldo-sts.com/>  

 

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