All connection contact surfaces should be clean and free of moisture and contaminants (including storage compounds) prior to the application of the thread compound, whether intended for storage only or as a “running” compound. Corrosion effects are the result of an electrolytic process in which both water and dissolved ions (chlorides, sulfides, sulfates, and other dissolved ions) serve together as an electrolyte.
Most corrosion inhibitors are “surface active,” meaning that the active molecules attach themselves to metal surfaces to prevent access by corrosion-causing contaminants. If, however, the contaminants are present on the threaded surface prior to application of the thread/storage compound, they will be trapped against the surface and cause corrosion. Simply drying the surface with compressed air is insufficient, because dissolved contaminants remain on the surface when moisture evaporates.
To remove moisture and contaminants, apply a dewatering fluid/corrosion inhibitor to threaded surfaces. Remove all dewatering fluid/corrosion inhibitor material from the thread surface before thread/storage compound application.