How to Keep Lead Solder From Oxidizing

When lead molecules in lead solder combine with oxygen molecules in the air the result is a dull gray to black tarnish that covers the surface of your soldering job. In many situations this isn't a large concern, but if you want your soldering job to stay bright and new-looking longer, you'll need to take a few seconds to protect your solder from the ravages of oxygen.

Things You'll Need

• Clear fingernail polish

Instructions

1. Solder your connection as usual.

2. Allow your soldered joint to cool.

3. Using the brush that is attached to the cap, apply a coat of clear fingernail polish to the surface of the solder. Allow the fingernail polish to dry completely (can take five minutes) before touching.

4. Apply a second coat of clear fingernail polish for added protection. Allow it to dry thoroughly (at least five minutes).

Tips & Warnings

• Do not breathe the fumes from the fingernail polish. Put on the polish with adequate ventilation.