Weller Soldering Tip #9

by Andy on July 25, 2008

A dull, gray tip is an indication that the soldering tip is not being tinned. The appearance is created by surface oxidation, which can only occur when the tip does not have a coat of solder protecting the working surface of the soldering tip.

Proper Tinning Practices:

· Always keep a thin, fresh coat of solder on the working surface of the soldering tip

· Avoid wiping the tip clean before placing it back into the iron stand. This is by far the single most common contributor to tip surface oxidation, but is also the easiest to fix. Leave the solder that is already on the tip in place and then wipe the tinning off the tip when preparing to use the soldering iron again, but immediately replenish it with a fresh layer. This assists in keeping the tip protected but also transfers the heat from the tip to the work being performed. A “dry” soldering tip cannot properly transfer heat (just as cooking in a pot without water, the solder and water act as the thermal medium for transferring heat).