Sulfamate electrolytic nickel is relatively easy to solder compared to
electroless. It is a pure finish without brighteners, phosphorus and stuff
such as found in bright electrolytic and electroless nickels.
--
Regards
Mike
BS&P
M: +44 [0] 7810 526 317
T: +44 [0] 1865 522 663
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David Hillman
Sent: Thursday, August 13, 2015 3:20 PM
To: [log in to unmask]
Subject: Re: [TN] Solderable Nickel?
LOL - sometimes our discussions are quite humorous! When we use the phrase
"nickel is quite solderable if not oxidized" is kinda like saying "I can
breathe underwater if I am using a scuba tank"! When we receive a nickel
surface finish on a component it will be oxidized as nickel oxide forms
very quickly and is very stable. I think the point everyone is making is
that if you can get the nickel oxide out of the way, we have a high
probability of making a successful solder joint. The real question is what
are the component suppliers doing to allow use to us to use our standard
process flux formulations (aka avoiding using aggressive flux formulations)
and not have nickel oxide cause wetting problems? Is there an OSP type
coating? I did not see any mention of this on the vendor's data sheet.
Dave
On Thu, Aug 13, 2015 at 9:03 AM, Stadem, Richard D. <
[log in to unmask]> wrote:
> Nickel is quite soluble in solder if not oxidized. There are many methods
> of preventing oxidation, including immersion gold plating (standard ENIG),
> OSP, and other organic or polymer coatings that are pre-stripped just
prior
> to processing. This is very common.
> I am just clarifying this for those who may not understand this thread
> because your emails seem to indicate that nickel is not solderable,
period.
> While nickel's rate of dissolution into molten solder is much slower than
> copper, silver, or gold, it is still quite solderable if not oxidized, and
> must be protected.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev
> Sent: Thursday, August 13, 2015 8:06 AM
> To: [log in to unmask]
> Subject: Re: [TN] Solderable Nickel?
>
> We are on the same wavelength then:-). In essence, everyone literally
> solder either to Cu or your Ni.
>
> There are only two ways of soldering to Ni I can think of: either have a
> rather strong flux (as you pointed out), or have something like "OSP"
> preserving its surface. ?I've never heard of such thing though but it
> doesn't mean it can not exist.
>
>
> Regards,
>
> Vladimir
> Sent from my BlackBerry 10 smartphone on the Rogers network.
> Original Message
> From: David Hillman
> Sent: Thursday, August 13, 2015 08:53
> To: [log in to unmask]
> Reply To: TechNet E-Mail Forum
> Subject: Re: [TN] Solderable Nickel?
>
> Hi Vlad - let's characterize nickel this way: in general, nickel is
> solderable with the aggressive fluxes. The majority of the flux
> formulations used by many of the High Performance OEMs are ROL0 materials
> which traditionally were not very compatible with nickel surface finishes.
> The flux formulations being used are not aggressive. So I have the some
> question as Ben - what's different about these new "solderable nickel"
> surface finishes? I have subjected them to 150C bake for 4 hours and they
> meet the IPC-JSTD-002 testing criteria. Pretty impressive.
>
> Dave
>
> On Thu, Aug 13, 2015 at 7:27 AM, Vladimir Igoshev <
> [log in to unmask]> wrote:
>
> > Ni in general is solderable. The clues to on is "for how long"! Are
> > you sure the parts font have a thin layer of Sn over Ni?
> >
> > ?Regards,
> >
> > Vladimit
> >
> > Sent from my BlackBerry 10 smartphone on the Rogers network.
> > Original Message
> > From: Gumpert, Ben
> > Sent: Thursday, August 13, 2015 07:35
> > To: [log in to unmask]
> > Reply To: TechNet E-Mail Forum
> > Subject: [TN] Solderable Nickel?
> >
> > TechNetters,
> >
> > I've received several components recently that were plated with
> > 'solderable nickel' and to my surprise they soldered just fine (using
> > a
> > ROL0 flux).
> > Anyone know what is going on to keep the nickel from oxidizing?
> >
> > Ben
> >
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