A method to measure fireside corrosion resistance of boiler components of ultra super critical boiler using indian coal ash or flyash at simulated boiler condition'

摘要

The invention relates to A method to measure fireside corrosion resistance of boiler components of ultra super critical boiler using Indian coal ash or flyash at simulated boiler condition, comprising the steps of: preparing a plurality of specimen formed of a base material corresponding to that of the boiler components; preparing a plurality samples of weld corresponding to that used in said boiler components; determining individually initial weight including dimension of all the base material specimen including that of the weld samples; preparing a plurality of mixtures formed of coal ash/ fly ash, alkali sulfate, and sodium chloride, each of said plurality of mixtures being formed of different composition of said constituent material, setting a timer and activating a thermocouple in the boiler simulation and placing the specimen/samples inside the simulator, the specimen/samples being covered with one of said plurality mixture; raising the temperature in stages within the simulator corresponding to that of resistance tubular furnace and allowing soaking of the specimen/samples for predetermined period and recording simultaneously the temperature through the thermocouple; taking out the specimen/samples after completion of soaking from the simulator and cleaning with acetone in an ultrasonic cleaning machine; washing with water and drying the cleaned samples/specimen by a drying machine; and measuring the weight and dimension of each specimen/sample to determine the corrosion loss.