Non corrosive Flux

A flux and its residue that do not corrode the base metal. For example, chemicals are used which isolate heated metal from oxygen in the air and so prevent, dissolve, or aid in the removal of oxidation during welding, brazing, or soldering. Preventing oxidation permits better metal flow in the joint and stops the formation of a corrosive residue on the base metal. A corrosive flux used with copper will leave behind a surface coating that will eventually oxidize the copper and turn it green.