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RE: Wipe Solvent Test Info Needed



Tim--

Here is a response to your question from a colleague of mine who has
recently done a wipe testing project for the Air Force:

-----Original Message-----
From:	Bryant, Scot P. 
Sent:	Thursday, March 30, 2000 11:20 AM
To:	Mihalik, Kimberly D.
Subject:	RE: Wipe Solvent Test Info Needed

Kim-

There is not an ASTM standard for this.  There are some accepted practices
in the aerospace community for wipe solvents, but not on oxygen systems.  I
can only assume that they are wiping the outside of components, housings,
tanks, etc.??  Anyway, they could use the practices for handwipes, but this
would not be very accurate.  I would simply contaminate my samples (propably
coupons of like material to the substrate) with a known amount.  I would
then dampen my rag or spray on the solvent (however they plan on using it).
I would then wipe once with medium pressure in one direction and again in
the opposite direction.  Allowing the solvent to flash, I would then weigh
the sample to determine the percentage of contaminant removed.  I would then
repeat the procedure 3-4 times to determine the amount removed with each
wet/wipe iteration.  This would need to be repeated for each contaminant,
solvent, and substrate.  

Let me know if you would like any additional information.

Scot