Glossary

In an electric system to protect underground iron pipes or structures from electrochemical action, a metallic rod which is driven

The surface finish resulting from anodizing; may be transparent or colored by the use of a dye or pigment in

To provide a hard, noncorrosive, electrolytic, oxide film on the surface of a metal, particularly aluminum, by electrolytic action.

A shaft or cluster of shafts fitted, at intervals, with rings.

1. A signaling device, usually electrically operated, that emits an audible signal and/or a visual indication under selected circumstances; for