Failure Analysis of Leaked Stainless Steel Housing of Electro Chemical Hydrogen Metre
The failure of the stainless steel housing of Electro Chemical Hydrogen Metre (ECHM) in the Steam Generator Test Facility resulting in a minor sodium fire has been investigated through systematic metallographic and fractographic analyses. The root cause of the failure was identified as caustic stress corrosion of the stainless steel flange that forms a part of the ECHM housing.
KeywordsSensitisation Metallurgical investigation Intergranular stress corrosion Failure mechanism Austenitic stainless steel Steel microstructure Scanning electron microscope
The authors thank Shri. S.C. Chetal, Director, IGCAR, Kalpakkam and Mr. K.K. Rajan, Director, FRTG, & Dr. T. Jayakumar, Director, MMG for their keen interest and motivation in this work. The authors also wish to acknowledge the help rendered during the experimental work by Shri. D. Natarajan, Foreman, PMG.
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