WAYS OF PREVENTING EROSION OF THE BLADING IN THE FIRST STAGES OF HIGH PRESSURE AND INTERMEDIATE PRESSURE CYLINDERS OF THE TURBINES OF POWER GENERATING UNITS.

Results of investigations into the erosion of blading have shown that the chief factors determining the intensity of erosion of the blading of turbines are the concentration of the abrasive particles and the velocity of the steam in the flow section. Corrosion is intensified by thermal cyclings during startup and shutdown of the units, which cause the scale to flake and to be carried into the turbine. Ways to combat erosion by reducing the allowable temperature of the walls of tubes of the superheating circuit, wider use of scale-resisting steels, such as austenitic steels instead of pearlitic outlet stages of superheaters and reheaters, are discussed.