Interconnects represent the main component of an SOFC stack in terms of weight and volume. They are typically made of ferritic stainless steel (FSS) as CROFER 22 APU, CROFER 22 H and AISI 441 At the stack service conditions, the interconnect is operating in a dual atmosphere: air at the cathode side; hydrogen-rich mixture at the anode side. The interconnect is coated at the air side with Co-Mn spinel while the fuel side is left uncoated. The stacks taken into account for this study operated for 5000 h, 9000 h, 20000 h respectively. One interconnect has been studied for each stack, sampling areas connected to the FSS plate. The samples were characterized by SEM-EDS. The effect of the exposure atmosphere and the contact with the electrodes were investigated.
CHARACTERIZATION OF INTERCONNECTS OPERATED IN REAL STACKS UP TO 20K HOURS
P. Piccardo;R. Spotorno;V. Bongiorno;
2019-01-01
Abstract
Interconnects represent the main component of an SOFC stack in terms of weight and volume. They are typically made of ferritic stainless steel (FSS) as CROFER 22 APU, CROFER 22 H and AISI 441 At the stack service conditions, the interconnect is operating in a dual atmosphere: air at the cathode side; hydrogen-rich mixture at the anode side. The interconnect is coated at the air side with Co-Mn spinel while the fuel side is left uncoated. The stacks taken into account for this study operated for 5000 h, 9000 h, 20000 h respectively. One interconnect has been studied for each stack, sampling areas connected to the FSS plate. The samples were characterized by SEM-EDS. The effect of the exposure atmosphere and the contact with the electrodes were investigated.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
