Solder
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Solder is a fusible metal alloy used to create a permanent bond between metal workpieces. Solder is melted in order to wet the parts of the joint, where it adheres to and connects the pieces after coo
Solder, drawn out to a diameter of 1.6 mm and wound/bent around a spool
A soldered joint used to attach a wire to a through-pin of a component on the rear of a printed circuit board (not a customary application of such joints)
Sn60Pb40 solder
Pure tin solder wire
Whisker (metallurgy)
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Metal whiskering is a phenomenon that occurs in electrical devices when metals form long whisker-like projections over time. Tin whiskers were noticed and documented in the vacuum tube era of electron
Solder
…between 5% and 70% by weight. The greater the tin concentration, the greater the solder's tensile and shear strengths. Lead mitigates the formation of tin whiskers, though the precise mechanism for this is unknown. Today, many techniques are used to mitigate the problem, including changes to the annealing process…
Silver whiskers growing out of surface-mount resistors
Microscopic view of tin used to solder electronic components, showing a whisker
Millimeter-long zinc whiskers on zinc-coated steel