Word of the Day: Differential Aeration Cell

The NACE Glossary Word of the Day for today, Friday September 11, 2009, is differential aeration cell.

Differential Aeration Cell—a concentration cell caused by differences in oxygen concentration along the surface of a metal in an electrolyte. A concentration cell is an electrochemical cell, the electromotive force of which is caused by a difference in concentration of some component in the electrolyte. (This difference leads to the formation of discrete cathodic and anodic regions.)