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Date: | Sat, 2 Jun 2012 09:00:26 +0300 |
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I'm surprised that you think Ensolv can even look at no-clean product
fluxes more than cosmetically. It is based on n-propyl bromide which has
general characteristics similar to trichloroethylene but is more toxic
(central nervous and reproductive systems), a suspected carcinogen and
depletes the ozone layer (the Parties to the Montreal Protocol have not
entered it in the list of controlled substances but their wording is to
discourage its use). It cannot be guaranteed to remove all the
components in your flux residues and it may leave an invisible monolayer
of one or more of them, some of which may be hygroscopic, which would
explain poor RF performance.
Have you performed SIR/ECM tests?
As Bev says, cleaning no-clean makes no sense. If you wish to clean (or
have to), use flux systems specifically designed for easy cleaning. A
good aqueous cleaner is second to none, as I have stated since the 1960s!
Brian
On 02/06/2012 02:49, [log in to unmask] wrote:
> Hi Folks!! Could use some help. We are a contract mfg. using no-clean solder paste and roll solder
> for secondary ops and touch-up. Some of the PCB assemblies contain RF components and we have
> had a customer voice some concerns regarding our cleaning (using EnSolv). Have heard that new
> chemistries with a aqueous washing system have been successful. Have also heard a vapor degreaser
> works well but not the greatest choice with RF components.
>
> Would appreciate being pointed in the right direction.
>
> Thanks in advance for your help!!!!!
>
> Regards,
> Bill
>
>
>
>
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