Pitting frequency is defined as?

• A. The number of pits per unit area
• B. The average pit depth
• C. The rate of pit growth
• D. The total pits in the specimen

Answer: (A)

Pitting frequency measures how often pits occur on a given area, i.e., the density of pits. It is expressed as the number of pits per unit area (for example, pits per square centimeter). This distinguishes it from pit depth (how deep a pit is), which is a measure of size rather than how often pits appear, and from the rate of pit growth (how fast a pit enlarges) or the total number of pits in the specimen (which isn’t normalized to area). So the best definition is the number of pits per unit area.