Re-Heater Tube in Power Boiler
Observation : External thinning , smooth areas
Cause : Fireside Corrosion Erosion Remarks : Abrasion from fly ash may cause erosion,
corrosion may also occur as sulfur deposits become acidic
during shutdown or cool gas temperatures. This type of
corrosion is more prevalent in oil-fired boilers and in the
back-end of the gas path i.e., economizers.