We switched to Dupont Vertrel XMS Plus. In a vapor cleaner. We had to do extensive
modification to the vapor cleaner. XMS is much more expensive. Modifications were made
to the water evaporator, compressor line pass through and we added a super chiller to
cool the air in the tank.

Cleaning times had to be increased (robot controlled batch system) with longer pre
cooling since the stuff won't condense on at less than 70 degrees or so.

The material is close to 111 in terms of effect on plastics. In general is it not as
aggressive as 111.

Right now we are trying to identify a white residue left on solder fillets formed from
and RMA solder paste. The white stuff does not seem to have any ionic content. It is
soluble in alcohol and water  but does not change the solutions resistivity.

There is no white residue on fillets formed in wave solder using Alpha Metals SA flux
. . . obviously we are not doing class 3 stuff.


Ducas Patrick wrote:

> Hi everybody,
>
> I posted a question few months ago and didn't get too many answers for this
> subject. I assume that there was not too many effort at that time to
> implement a new cleaning media to be used in vapor degreaser for the
> replacement of  1,1,1-Trichloroethane.
>
> It would be appreciated to have any comments or inputs from those who have
> implemented a new cleaning solvent with 0 or low ODP to replace the solvent
> HCFC-141b. I would like to have your appreciation on the product you have
> selected. Have you tried aerosol cleaner degreaser for manual cleaning and
> how does it compares with vapor process?
>
> What have been done to implement the solvent replacement (ex: cleanliness
> test, inspection, SIR testing or more)? Is the Appendix D (Material and
> Process Compatibility Testing) of J-STD-001B been used for the
> implementation if you assemble Class-3 products?
>
> If you have any suggestion of cleaning solvent suppliers (for vapor
> degreaser or aerosol degreaser), please send it to [log in to unmask]
> <mailto:[log in to unmask]> .
>
> Thanks folks!
>
> Patrick Ducas
> Production Engineer
> (450) 358-2000 ext 2400
> [log in to unmask]
>
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