Well, sulfuric acid is halide free too.
Doug Pauls
Guy Ramsey <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
09/10/2010 09:21 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Guy Ramsey <[log in to unmask]>
To
[log in to unmask]
cc
Subject
Re: [TN] Cleaning No Clean Flux
Spot on.
There is at least one low residue water soluble, fairly easy to remove,
that
in my experience should be removed for many reasons. Even though, because
it
has passed certain IPC tests it is marketed as a no-clean. I hasten to
add,
in some service environments it might be a perfectly fine "no-clean"
solution.
BTW, the other day we were asked to evaluate a board assembled elsewhere.
It
was badly corroded. I asked for the Flux and solder paste data sheets. The
front cover proclaimed the material was "Halide Free" and no-clean. The
actual data indicated that the material was J-STD-004 H1.
Hummm.
Guy
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman
Sent: Friday, September 10, 2010 9:58 AM
To: [log in to unmask]
Subject: Re: [TN] Cleaning No Clean Flux
Hi Bob - unfortunately the issue you raise is more a confusion of
terminology than technology. As an industry, we should be using the term
"low residue" instead of "no clean". The amount of solids in a flux
material is a key characteristic. The lower the solids content, the easier
it is to remove (typically). The term "no clean" really describes a
cleaning process - in terms of using a no clean flux, the process is to
not clean at all leaving the flux residues on the pwa. However, as an
industry, we are sloppy and use the words "no clean" interchangeably for
both a material characteristic and a cleaning process. There are low
residue fluxes that are designed to be removable (sometimes described as
"cleanable no cleans") and there are low residue fluxes that are designed
to not be removable (i.e. no cleans). We really just need to be more
concise when using the term "no clean" so that we don't cause confusion.
Dave Hillman
Rockwell Collins
[log in to unmask]
Robert DeQuattro <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
09/10/2010 08:40 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Robert DeQuattro <[log in to unmask]>
To
[log in to unmask]
cc
Subject
[TN] Cleaning No Clean Flux
Hello Everyone. I know there has been a lot of interesting dialogue the
past few days reference hand solder and flux and cleaning. My question
is "is isopropyl alcohol acceptable to use to clean no clean flux"? We
have Novec flux remover, but that leaves a white residue similar to what
some of you have complained about during the course of the related
thread. Any ideas on the best way to remove or avoid this. Also, why
would "No cleans" need cleaning?
Thanks,
Bob DeQuattro
Quality Manager
VR Industries, Inc
------------------------------------------------------------------------
------------------------------------------------
This email message is for the sole use of the intended recipient(s) and
may contain confidential and privileged information. Any unauthorized
use or disclosure is prohibited. If you are not the intended recipient,
please contact the sender by reply email and destroy all copies of the
original message.
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
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 has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
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 has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
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 has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
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
-----------------------------------------------------
|
