ASM Failure Analysis Case Histories: Power Generating Equipment
Pitting Corrosion of Steel Tubes in an Air Preheater
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Published:2019
Abstract
Severe pitting corrosion of a carbon steel tube was observed in the air preheater of a power plant, which runs on rice straw firing. Approximately 1450 tubes were removed from Stage 3 of the preheater (air inlet and flue gas outlet) due to corrosion and local bursting. Samples from Stage 2 (where corrosion was low) and Stage 3 (severe corrosion) were taken and subjected to visual inspection, SEM, x-ray diffraction, microhardness measurement, and chemical and microstructural analysis. It was determined that extended non-operation of the plant resulted in the settlement of corrosive species on the tubes in Stage 3....
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Member Sign InB. Vamsi Krishna, R.K. Sidhu, Pitting Corrosion of Steel Tubes in an Air Preheater, ASM Failure Analysis Case Histories: Power Generating Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.power.c9001616
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