Abstract
Leakage failure of high-pressure superheater for waste heat boiler of gas-steam combined cycle unit was analyzed by metallographic analysis, scanning electron microscope, tensile property analysis and X-ray fluorescence spectrum. The results show that: The main cause of leakage failure of high-pressure superheater is under-deposit corrosion caused in long-term operation process. In view of the under-deposit corrosion causes of high-pressure superheater, preventive measures are put forward.
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