Eeyore wrote in message
...


N Cook wrote:

In the following picture
http://home.graffiti.net/diverse:gra...net/solder.jpg
without any further treatment after removing from the boards,
one has been desoldered from a lead-free soldered board and the other
from a
leaded-solder board. Particularly looking at the top pin of each
capacitor
would anyone care to comment?

You asked before.

I'm not clear what it's supposed to show. It's not as clear as it could be
for
one thing.

Graham


I tried changing the angle of illumination and trying different colour
backgrounds behind the pins but it was too difficult to differentiate with
my camera and "techniques" .
The bottom one came from a lead free soldered board. Instead of a "slivery"
sweated film over the pins it was a dusty light grey (tin pest ? ) with just
the odd small spot of "silvering".
The top one was "good" overall "silvering" with just the presence of the
normal lumps of old resin or whatever that is usually present on
desoldering.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/