Ahh, time for a history lesson.
Halides was a central figure in an early Greek tragedy, and it relates
back to an event during the Copper Era in civilization. Halides was
reported to be a nasty and evil person, poisoning almost everyone and
everything around him. He even irritated the Greek god Multicorides to
the extent that Multicorides cursed Halides that his evil would come out
in his sweat. When Halides took his first bath after being cursed,
naturally done in an elegant copper tub, the water became so acidic that
it dissolved the tub and the collection of copper salts poisoned Halides.
He died unmourned.
It was the first recorded case of an acid bath going out of control. It's
also why we today call soldering copper pipes as "sweat soldering".
Doug Pauls
Inge <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
10/12/2011 06:20 AM
Please respond to
Inge <[log in to unmask]>
To
<[log in to unmask]>
cc
Subject
Re: [TN] Wire soldering question
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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