Amol,
I'm slow as always. It would be interesting to know WHY did you worry about
these microscopic amounts of Titanium. You can find anything in a solder
joint. I have hardly ever seen a clean one, half of the element system
seems to be extra passengers. I have bought TOFSIMS analysis up and then on
solder joints, and I have been surprised every time: from where did all
stuff come? Cu,Zn,Mg,Fe,Na,Ni, Al, P, Pd, Cl, you name it. By the time I
began to omit these extra spices, because they did not have any
significance as a whole.

Inge


On 13 June 2013 17:40, Whittaker, Dewey (EHCOE) <
[log in to unmask]> wrote:

> No, he was looking for a hassle-free board. I agree with Mike. Titanium
> used in the soldering process should not be a problem. The wash process
> with a saponifier is where I would concentrate my efforts especially if
> they were also cleaning titanium pallets/fixtures from the soldering
> process.
> Dewey
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Neifer, Gebhard
> Sent: Thursday, June 13, 2013 8:23 AM
> To: [log in to unmask]
> Subject: [TN] AW: [TN] Titanium
>
> Is this a Pb-free HASL board? Maybe your board supplier used Solderwell's
> LF-1-202A (a SnCuTi alloy) for HASL...
>
> <<http://www.solderwell.com.cn/en/Productsview.asp?id=133&pid=27>>
>
> Gebhard
>
>
> -----Ursprüngliche Nachricht-----
> Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Brian Ellis
> Gesendet: Donnerstag, 13. Juni 2013 16:36
> An: [log in to unmask]
> Betreff: Re: [TN] Titanium
>
> Both ideas are potentially valid. It would be easy to trace the source by
> EDXing a sample of the raw solder in the machine, as well. I take it the Ti
> concentration is in the ppm/ppb range. Perhaps your question is really
> whether small quantities of Ti will affect the reliability of the solder
> joint? I think not.
>
> On 13.06.2013 17:03, Amol Kane wrote:
> > Dear Technetters,
> > We are seeing some titanium residues (confirmed by EDX) on solder joints
> after wave soldering post wash (that is not to say they are not present
> post wave, more analysis is ongoing). Water soluble process, high lead
> alloy, and a saponified wash. So far the Ti residues are only detectable on
> the solder joints, not on the assy surface. For general information. what
> are some possible sources of Ti on the assembly?
> >
> > Regards,
> > Amol
> >
> >
> >
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