Steve Zeva wrote:
> Well, when I cut the bars in half, I saw something I've never seen before
> (or
> never noticed), inside the bar, at about the middle of it. There's
> something
> that's tin/lead in appearance embedded inside the solder bar! Just what
> the
> heck is that?
>
Steve, without having it in front of me, it sounds like larger cystals of
tin/lead have formed inside the bar as the insides cooled slower than the
outside. Just a guess. Also, if you were to analyze the composition of a
bar of solder you would find that the outer layer would be slightly higher
in tin composition.
regards,
Bev Christian
Nortel
> ----------
> From: Stephen R. Gregory[SMTP:[log in to unmask]]
> Sent: Monday, August 03, 1998 7:23 PM
> To: [log in to unmask]
> Subject: Re: [TN] Questions about KLEENOX "P"
>
> In a message dated 8/3/98 3:00:44 PM Pacific Daylight Time,
> [log in to unmask] writes:
>
> >>Thomas-
>
> >>We do use Kleenox to de-dross our solder pot. Its effects as an ongoing
> preventer of >>dross are questionable as it seems to burn off after about
> an
> hour (our pot is at 475F). It >>is effective in separating the dross from
> the
> solder when actually removing the dross. >>The stuff needs to be mixed in
> thoroughly with the dross and the dross seems to >>separate rather easily
> from
> the rest of the solder. Its cost seems to be less than that of >>more
> solder
> additions and more frequent dross shipments for reclamation.
>
> >>Ryan Jennens
> >>Phoenix Engineering Design
>
> Moss, Thomas wrote:
>
> >>> Hello all,
> >>> I've been lurking on the list for awhile, but I thought I'd
> come
> >>> out of hiding to ask some questions.
> >>> I want to try some Kleenox "P" to reduce the amount of dross
> >>> from our Wave Solder pot. Does anyone out there have any good or bad
> >>> experiences with its use? Will its repeated use leave a residue or
> >>> contamination in the solder? Are there any downsides that I'm not
> >>> thinking of? Lastly, was it cost-effective for you to use?
> >>>
> >>> Thanks in Advance,
> >>> Tom Moss
>
> Hi Tom!
>
> Ryan pretty much hit the nail on the head as far as Kleenox goes...it
> won't really prevent dross from forming, even though they claim it does.
> BUT,
> like Ryan said, it DOES make the dross separate from the solder better
> when
> you're cleaning your pot out, and you do save money in that sense. In a
> typical mornin' pot de-drossing, I would throw at least a couple of pounds
> of
> the shiny stuff in the dross bucket, but when using Kleenox that amount is
> reduced by at least half...
>
> Speaking of wave soldering subjects, I have a pretty off the wall
> question for anybody. Today I bought a very small static solderpot that
> we'll
> using for tinning and what-not...after I unpacked it, I went and got a
> couple
> of bars of solder to fill it. The bars were a little long to go in the
> small
> static pot, so I cut them in half to put in the pot so they could melt
> easily.
>
> Well, when I cut the bars in half, I saw something I've never seen before
> (or
> never noticed), inside the bar, at about the middle of it. There's
> something
> that's tin/lead in appearance embedded inside the solder bar! Just what
> the
> heck is that? Some secret herbs and spices? (Oh wait, the secret herbs and
> spices is kentucky fried chicken's hook, not Kester's...hehehe)
>
> It doesn't appear like it's a different metal, but it does appear that
> something was added there permanently to into the solder. Anybody have any
> idea what that is? Oh, I'm using Kester Ultrapure 63/37...if you've never
> seen
> this either and have some Kester bar solder, take a bar and cut one in
> half...it looks like there's something a bit smaller than the diameter of
> a
> pencil that is embedded inside the solder bar and runs almost the whole
> length
> of the bar. It's weird, it's probably been there whole time, but I 've
> never
> noticed before because I usually don't cut solder bars in half to fill a
> solder pot.
>
> -Steve Gregory-
>
> ################################################################
> TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
> ################################################################
> To subscribe/unsubscribe, send a message to [log in to unmask] with
> following text in the body:
> To subscribe: SUBSCRIBE TechNet <your full name>
> To unsubscribe: SIGNOFF TechNet
> ################################################################
> Please visit IPC's web site (http://www.ipc.org) "On-Line Services"
> section for additional information.
> For technical support contact Hugo Scaramuzza at [log in to unmask] or
> 847-509-9700 ext.312
> ################################################################
>
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
