Failure Analysis of the Liner Plate of CDQ Chamber Made of AISI 310
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Failure analysis of liner plate of coke dry quenching chamber was carried out. Crack as well as thinning was observed in the failed plate. Chemical analysis revealed that the liner plate was made of AISI 310 stainless steel. A sample of failed plate was studied under SEM to understand the metallurgical changes. Results showed severe intergranular corrosion near the crack and at thinned region of the failed plate. EDS analysis revealed the formation of chromium carbides along the grain boundary. EDS result also showed the presence of sulfur at the corroded portion. Findings revealed that the plate failed due to intergranular corrosion at elevated temperature; the presence of sulfur compounds aggravated the rate of corrosion.
KeywordsCDQ EDS SEM Intergranular corrosion
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