Analysis on Reasons of Hot Corrosion Invalidation of Platen Super-heater
The reasons of tube-burst accidents of platen super-heater of thermal power plant were discussed, the composition and morphologies of corrosion products were analyzed by SEM, EDS, XRD and metallurgical microscope. The testing results show that the reasons of the superheating tube-burst are that hot corrosion of the composite-sulfate corrodes to tube causeing the tube attenuating and the existent of outer impurity in tube.