Who is Halides?
Inge
----- Original Message -----
From: "Brian Ellis" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, October 12, 2011 12:59 PM
Subject: Re: [TN] Wire soldering question
> Who says that halides are no longer our friends? Those who don't know how
> to throw them out when they have outstayed their welcome! I'm no longer in
> the business, but, if I were, I would judiciously use halogens to
> flame-retard laminates, in tin/solder fluxes and maybe in solvents and I'm
> damn sure the reliability of my products would not be compromised in any
> way, compared to the results produced by my brethren who shun everything
> in column VIIB.
>
> It always used to tickle me when the great vogue in Germany was to use DIN
> 8511 F-SW-32 (halide-free) fluxes and then to use chlorofluorocarbon 113
> solvent in a vain attempt to remove the residues, leaving a visible white
> residue of the acid activators. I have seen the lack of reliability of
> such assemblies on many occasions and it was nothing to do with the
> solvent containing three atoms each of fluorine and chlorine in each
> molecule. It was much more to do "halogenidfrei" being a buzzword in an
> industry that understood nothing that smacked of chemistry.
>
> Brian
>
> On 11/10/2011 23:33, Whittaker, Dewey (EHCOE) wrote:
>> Instead of flux try scare tactics. Threaten to have Doug do the
>> soldering. The wires will probably wet themselves.
>> Back when Halides were our friends, I used a pre-tinning flux (Kester, I
>> think) designed for silver finishes. It worked great.
>> Dewey
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Keith Calhoun
>> Sent: Tuesday, October 11, 2011 12:56 PM
>> To: [log in to unmask]
>> Subject: [TN] Wire soldering question
>>
>>
>> We are building a small assembly for one of our customers using
>> M22759/12-24 wires, (nickel plated copper, Teflon insulated). We are
>> using Multicore HMP solder, (Sn5, Pb93.5, Ag1.5) for this assembly.
>>
>> Do any of you have a recommendation for a flux that may help in getting
>> this wire to wet? The other solder joints are acceptable, we just can't
>> get the wire to wet. I know that I am trying something difficult, as
>> soldering to nickel is difficult at best. I would be most greatful for
>> any suggestions that anyone has for this.
>>
>> Thanks for the excellent resource!
>>
>> Keith S. Calhoun
>> Manufacturing Engineering Manager
>> SoPark Corporation
>> 3300 South Park Avenue
>> Buffalo. New York 14218
>> Phone: 716-822-0434 ext. 237
>> Fax: 716-822-5062
>> [log in to unmask]
>> Thank you for helping SoPark reach our 30th year as a Premier
>> Electronics Manufacturing Service Provider!
>> ISO 9001:2008& AS9100B Certified
>>
>>
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>
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