Hi Phil! I would echo Brian's comments about using an abrasive/mechanical
oxide removal procedure - too great of an opportunity to create
nonwetting/dewetting situations. There are a number of other chemical oxide
removal procedures (e.g. SolderNu, aggressive fluxes, acid treatments) but
realize that any chemical treatment has the potential for causing a
contamination issue of the component itself which could later be a latent
defect. What is the component finish composition - Sn63?

Dave Hillman
Rockwell Collins
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                      Phil Nutting
                      <PNutting@KAISERS        To:       [log in to unmask]
                      YSTEMS.COM>              cc:
                      Sent by: TechNet         Subject:  [TN] cleaning oxidized THT component leads
                      <[log in to unmask]>


                      02/24/2003 10:58
                      AM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to Phil
                      Nutting






I have some THT capacitors that seem to have an oxide layer preventing good
solder joints.  The parts were purchased about 5 years ago and are stored
loose in the stockroom bin.  Aside for changing our storage habits and
polishing each lead with Scotchbrite before soldering, is there a better,
faster or easier way of cleaning the leads before soldering?

Thanks in advance for your collective wisdom.

Phil Nutting

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