TECHNET Archives

January 2010

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Stadem, Richard D." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Stadem, Richard D.
Date:
Wed, 20 Jan 2010 12:36:03 -0600
Content-Type:
text/plain
Parts/Attachments:
text/plain (232 lines)
Pants on the ground, Pants on the ground.......

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Fenner
Sent: Wednesday, January 20, 2010 11:20 AM
To: [log in to unmask]
Subject: Re: [TN] Antimony in solder

There are many myths about tin pest, some of them you really want to be
true
like: the reason Napoleon lost against the Russians was that the French
Uniform buttons were made of tin, they succumbed to tin pest and their
trousers all fell down......
Our European office gets about 3 tin pest questions a year, but it never
is.
The failures are due to more boring things like poor wetting,
inappropriate
joint design and so on. Or sometimes people report tin pest when they
mean
tin whiskers.
NPL here did look into this quite thoroughly. You can get their report
on
line, a very nice piece of science. More dramatically satisfying you can
see
video from their research showing tin pest eating a lump of tin. They
concluded tin pest was not a worry and so far as I know there has NEVER
been
a proven case of tin pest in electronics. Presence or absence of 0.X%Sb
in
tin is not significant compared to ~40% Pb. Possibly the Sb made the
solder
harder/stronger, but more likely other changes were made as indicated
above.

Regards
 
Mike

 

 

Mike Fenner, Technical Manager
Indium Corporation
Europe 

Mob: + 44 7810 526 317
Skype: mike.fenner
Tel: + 44 1908 580 400 
Fax: + 44 1908 580 411 
www.indium.com 

---------------------

Indium Corporation
Incorporated in New York, USA
Registered office: (Not for correspondence) 
77-97 Harpur Street, Bedford , UK
Registered number: fc16473

* Please  think before you print

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Roberts, Jon (SA-1)
Sent: Wednesday, January 20, 2010 4:35 PM
To: [log in to unmask]
Subject: Re: [TN] Antimony in solder

I was always trained during my early years working with the Cat A under
the WS6536, DoD Std 2000, etc days that Bev stated to reduce tin pest.
I was informed that during the cold war in the 70's that line of radars
were installed in the northern part of Canada to detect incoming
missiles attacks. The extreme cold temperature caused solder failures
related to tin pest or was attributed to tin pest.  I believe my Cat A
without question. Anyone else remember being told that?  I am one of the
older ones here.  Jon  

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: Wednesday, January 20, 2010 9:56 AM
To: [log in to unmask]
Subject: Re: [TN] Antimony in solder

Graham,
I think it was historically added because of a fear of tin pest.  Which
is weird since lead is an excellent deterrent to tin pest.
Bev

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Nigel Burtt
Sent: Wednesday, January 20, 2010 10:51 AM
To: [log in to unmask]
Subject: Re: [TN] Antimony in solder

Antimony affects wetting speed

Useful reference here:

http://www.kester.com/en-us/documentation/EffectsofMetallicImpurities.pd
f

Nigel

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential
information, privileged material (including material protected by the
solicitor-client or other applicable privileges), or constitute
non-public information. Any use of this information by anyone other than
the intended recipient is prohibited. If you have received this
transmission in error, please immediately reply to the sender and delete
this information from your system. Use, dissemination, distribution, or
reproduction of this transmission by unintended recipients is not
authorized and may be unlawful.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

This communication is intended only for use by the addressee(s) named
herein
and may contain business confidential and/or legally privileged
information.
If you are not the intended recipient of this e-mail, you are hereby
notified that any dissemination, distribution, disclosure or copying of
this
e-mail and its contents is strictly prohibited. If you have received
this
e-mail in error, kindly notify the sender by replying to this message.
In
addition, please permanently delete the message and any attachments
without
copying or disclosing the contents. Thank you for your cooperation.

THIS DOCUMENT AND/OR SHIPMENT MAY CONTAIN COMMODITY ITEMS, SOFTWARE OR
TECHNICAL DATA THAT IS CONTROLLED BY U.S. EXPORT LAW, AND MAY NOT BE
EXPORTED OUTSIDE THE UNITED STATES OR TO NON U.S. PERSONS WITHOUT THE
APPROPRIATE EXPORT LICENSE FROM EITHER THE U.S. DEPARTMENT OF STATE OR
DEPARTMENT OF COMMERCE.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask]
or
847-615-7100 ext.2815
-----------------------------------------------------


***This email, its content, and any files transmitted with it, are
intended solely for the addressee(s) and may be legally privileged
and/or confidential. If you are not the intended recipient, please
contact the sender by return and delete the material from any computer.
Any review, retransmission, dissemination, or other use of, or taking of
any action in reliance upon this information by persons or entities
other than the intended recipient is prohibited.

Messages sent via this medium may be subjected to delays, non-delivery,
and unauthorized alteration. This email has been prepared using
information believed by the author to be reliable and accurate, but
Indium Corporation makes no warranty as to accuracy or completeness.
Indium Corporation does not accept responsibility for changes made to
this email after is was sent. Any opinions or recommendations expressed
herein are solely those of the author. They may be subject to change
without notice.***

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2