if you not catch cold, your nose detection limit is in ppb level... as for
thiol, it happen to be on the sensitive side of the detection... go to UV
cure soldermask fab - usually you can smell it... even you get cold...(the
new version I was told added some stuff to minimize the smell).  off track
now (before someone to kick me off the TN... stop).
                jk
> Vladimir,
>
> Uncertain about this as Joyce mentioned:  [most likely not the thiol
> based... you can't missed by sniff test if it is there...;-(]
>
> Since I did not smell any significant odor we assume it is not thiol
> based.  No real background in chemistry so I'm not sure what thiol based
> chemistry would smell like.  Joyce implies it has quite a signature odor.
>
> Drew
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev
> Sent: Thursday, August 13, 2015 12:02 PM
> To: [log in to unmask]
> Subject: Re: [TN] Solderable Nickel?
>
> Drew,
>
> What kind of nose you'd recommend for the " sniff test"? :-)
>
> Vladimir
>
> Sent from my BlackBerry 10 smartphone on the Rogers network.
>   Original Message
> From: Drew meyer
> Sent: Thursday, August 13, 2015 12:58
> To: [log in to unmask]
> Reply To: TechNet E-Mail Forum
> Subject: Re: [TN] Solderable Nickel?
>
> Joyce,
>
> I never thought to give the parts the sniff test. There was no noticeable
> odor in ordinary inspection or solderability testing.
>
> Drew
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
> Sent: Thursday, August 13, 2015 9:39 AM
> To: [log in to unmask]
> Subject: Re: [TN] Solderable Nickel?
>
> Some SAM (self assembled molecule) with alkanethiols are known to prevent
> nickel oxidation... similar to the OSP used for Cu, it might be one of
> those... just a guess. we are possibly not talking about the nickel we use
> to get here "solderable"? would be interesting to know the shelf life...i
> am looking forward for more info. (is it smelly?) jk
>> 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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