Hi Rudy - I'll second that vote for a highly aggressive flux as we need to
solder to magnetic and nickel based wire materials on occasion. If we
don't use aggressive flux, we don't make good solder joints.
Dave Hillman
Rockwell Collins
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R Sedlak <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
05/18/2010 08:17 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
R Sedlak <[log in to unmask]>
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Subject
Re: [TN] Connecting to Nitinol
Steve:
I certainly did mean what I said about the doubtful reliability of any
electrical connection not based on a metallic bond, like soldering.
Turns out that we have a lot of familiarity with Nitinol because we have
developed an electropolish for Nitinol, primarily aimed at the medical
device world (stents).
We have seen that unless the Nitinol is oxide free, it will not polish, no
matter what voltage you apply.
And whereas I would like to sell the preparation system we have developed
for preparation for electropolishing, in this case it is almost certainly
unnecessary, as simple fine steel wool will likely be excellent
preparation for whatever is the next step.
Of everything suggested so far on this matter on Technet, I most like Mike
Fenner's suggestion of using his extreme aggressive flux to solder to say
a Copper wire, carefully cleaning the flux residue off, then soldering the
Copper wire to the PCB.
Rudy Sedlak
RD Chemical Company
--- On Tue, 5/18/10, Steven Creswick
<[log in to unmask]> wrote:
From: Steven Creswick <[log in to unmask]>
Subject: Re: [TN] Connecting to Nitinol
To: [log in to unmask]
Date: Tuesday, May 18, 2010, 3:23 AM
Rudy,
Do you have a plating system that can reliably plate to the Nitinol and
subsequently be reliably soldered??
You meant this, right? "I have doubts about the long term performance of
any connection not based on soldering"? ļ
Steve Creswick
http://www.linkedin.com/in/stevencreswick
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of R
Sedlak
Sent: Monday, May 17, 2010 11:28 AM
To: [log in to unmask]
Subject: [TN] Connecting to Nitinol
In a related world, we do a lot with Nitinol. Based on our experience
with Nitinol, I have doubts about the long term performance of any
connection not based on soldering. Nitinol is a high fraction Titanium,
and when the Titanium grows an oxide, the resistance soars, to the point
where it is practically non-conducting.
Rudy Sedlak
RD Chemical Company
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