No, not a new word , contanimation. Should be contamination, of course.

On 28 February 2012 23:11, Inge Hernefjord <[log in to unmask]> wrote:

> P-hil,
> long since stepping on the TN stage.
> I advise you to read Brian Ellis most competent book about cleaning
> boards, Page 201 and 202 ,His book is on neutral ground, is free from
> hidden business interests and is adequate from first to last page.I don't
> dare send copies, because BE is a rider of defence against
> illegal copymaking. Then you should read pages 249-262,  MIL-P-28809 about
> ionic contanimation, background and practice. Why? Because there are two
> ditches you can run into, one being scared by the academic line that will
> blindly refuse everything that signalled a few chlorine molecules, or the
> other ditch representated by guys who neglect 'a little' halogens as a
> problem because they don't know anything in chemistry. Best is to know
> what actual ionic level you have and be sure of your customer's
> requirement. Again, reading Brian's book, and you'll find answer to your
> question.
>
> My own comments:
> -can't you use alcohol based cleaning? We use that for electronics to our
> military laser optcs.
> - can't you use a neutralizer?
>
> Inge
>
> PS. If you don't have the book, and you are in a hurry, Brian may give  me
> a OK to send copies
>
>
>
>
> On 28 February 2012 20:12, Phil Nutting <[log in to unmask]>wrote:
>
>> We have some parts that are sensitive to halides in flux, specifically
>> some thru-hole opto devices.  We are currently using a water soluble flux
>> that contains halides.  In doing some very quick research it looks like the
>> WS fluxes have halides and the NC fluxes do not.
>>
>> Is there a halide free WS flux for lead-free wave soldering (foam
>> application)?
>>
>> We need the WS fluxes because we currently use a DI water only batch wash
>> system.  Washing the boards is mandatory for our applications.
>>
>> Thanks in advance,
>>
>> Phil Nutting
>> Design for Manufacturing Engineer
>> Kaiser Systems, Inc.
>> 126 Sohier Road
>> Beverly, MA 01915
>> Phone: 978-922-9300 x1310
>> Fax: 978-922-8374
>> e-mail: [log in to unmask]<mailto:[log in to unmask]>
>> www.kaisersystems.com<http://www.kaisersystems.com>
>> www.linkedin.com/in/philnutting<http://www.linkedin.com/in/philnutting>
>>
>>
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