What is a form of localized corrosion that creates small holes in metal components?
A. Pitting
B. Fouling
C. Erosion
D. Impingement
A. Correct. Pitting is a form of localized corrosion that creates small holes in metal components.
B. Incorrect. Turbine fouling is caused by mineral deposits from the steam.
C. Incorrect. Most corrosion/erosion problems occur as a result of damage that takes place when the turbine is not running.
D. Incorrect. Impingement occurs when the steam quality decreases to the point that steam condensate exists in the turbine.
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