Data di Pubblicazione:
2012
Abstract:
The water-cooled ductwork of an Electric Arc Furnace direct evacuation system, installed in a steelmaking plant, experienced premature failure.
The damaged pipe was investigated by means of optical microscope, scanning electron microscope equipped with energy dispersive X-ray spectroscopy micro-analysis and differential scanning calorimetry, in order to find out the failure causes and to suggest preventive solutions.
The study shows that failure was mainly due to sulphur dewpoint corrosion formed in the hot service and continued also during furnace shutdown. Some modifications to the process were recommended to cope this problem.
The damaged pipe was investigated by means of optical microscope, scanning electron microscope equipped with energy dispersive X-ray spectroscopy micro-analysis and differential scanning calorimetry, in order to find out the failure causes and to suggest preventive solutions.
The study shows that failure was mainly due to sulphur dewpoint corrosion formed in the hot service and continued also during furnace shutdown. Some modifications to the process were recommended to cope this problem.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
corrosion; metallurgical failure analysis; microanalysis; water pipes
Elenco autori:
Gelfi, Marcello; Pola, Annalisa; Roberti, Roberto; LA VECCHIA, Giovina Marina; E., Galli
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