Erosion- Corrosion Behavior of Steels Grades (Grade A1, T11, T22) In the Real Service Environment of the Boiler

The re heater and super heater tubes of the boilers used in thermal power plants. Surface degradation due to combined effect of erosion–corrosion mechanism, resulting in the tube wall thinning and premature failure. Steels (GradeA,T11,T22) can be used as boiler tube materials to increase the service life of the boilers, especially for the new generation ultra-supercritical boilers. The aim of the present investigation is to evaluate the erosion–corrosion behaviour steels (GradeA, T11, T22) in the real service environment of the coal-fired boiler of a thermal power plant. The cyclic experimental study has performed for 1000 h in the super heater zone of the coal-fired boiler where the temperature was around 900◦C. Fly ash particles entrained in the flue gas of coal-fired boilers can cause serious erosion on the critical components along the flow path. Such erosion can significantly jeopardise operational life of the boiler.