"I suggest contacting your solder/flux supplier and ask what they
recommend."
Good suggestion.
No clean does not mean "no cleaning allowed/possible", but "No cleaning
required [normally]".
There are different ways to achieve no clean properties and within those
different ways many variations. It isn't really possible to lump all these
together to make general statements about the cleanability of no cleans. The
term does not describe a specific formulation as does RMA, but
characteristics of the residues after processing. Some flux types are easier
to clean than others and will respond better to some cleaner types than
others according to the specific chemistry of flux and cleaner type.
For these reasons we, in common with some other major manufacturers, work
closely with recognised flux remover companies such as Zestron and Kyzen and
publish recommended product/process charts. You can download these from our
and their websites.
Regards
Mike Fenner
Indium Corporation
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Sauer, Steve (Xetron)
Sent: Wednesday, March 05, 2008 6:40 PM
To: [log in to unmask]
Subject: Re: [TN] Cleaning No-clean
I'll second what Doug stated as I have used a batch system with 18% Kyzen
A4520 at 120°C that successfully removes "no clean" residues from assemblies
that have been sitting for up to 2 weeks. One thing to remember is that not
all no-cleans are synonymous with low residue. Some "no clean" residues
will look 10X worse after being exposed to a cleaning process. I suggest
contacting your solder/flux supplier and ask what they recommend.
Good Luck
Steve
Steve Sauer, CEPM
Sr. Project Engineer
Northrop Grumman Xetron
Cincinnati, OH
513-881-3368
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas O. Pauls
Sent: Wednesday, March 05, 2008 9:00 AM
To: [log in to unmask]
Subject: Re: [TN] Cleaning No-clean
Dan,
Yes, many of the low residue fluxes can be successfully cleaned with the
right saponifier and batch wash parameters. I would suggest that you
contact Kyzen Corporation. They have done a great deal of work on
chemistries to clean low residue fluxes, in both in-line and batch
operations. They have looked at almost every flux made. We are a Kyzen
house here at Rockwell. They support their products very well.
Charlie Pitarys of Kyzen regularly hangs out on this forum. I suspect he
will be contacting you.
Doug Pauls
Rockwell Collins
Dan Mauro <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
03/05/2008 06:35 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to Dan Mauro
<[log in to unmask]>
To
[log in to unmask]
cc
Subject
[TN] Cleaning No-clean
Folks,
I have a need to clean No-clean residue from PCBA's. Can this be achieved
with water washer and some type of saponifier ? Can anybody suggest a batch
process?
Thanks,
Dan
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