Abstract
Duplex 2205 stainless steel was deposited with ∼0.6 μm thick SnO2:F coating; coated steel was characterized for PEMFC bipolar plate application. Compared with bare alloy, interfacial contact resistance (ICR) values of the coated 2205 steel are higher. SnO2:F coating adds its own resistance to the air-formed film on the steel. In a PEMFC anode environment, a current peak of ca. 25 μA/cm2 registered at ca. 30 min for coated 2205 steel. It stabilized at ca. 2.0-1.0 μA/cm2. This peak is related to the complicated process of coating dissolution and oxide-layer formation. Anodiccathodic current transfer occurred at ca. 200 min polarization. In a PEMFC cathode environment, current was stable immediately after polarization. The stable current was ca. 0.5-2.0 μA/cm2 during the entire polarization period. AES depth profiles with tested samples and ICP analysis with the tested solutions confirmed the excellent corrosion resistance of the SnO2:F coated 2205 alloy in simulated PEMFC environments.
Original language | American English |
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Pages (from-to) | 1879-1889 |
Number of pages | 11 |
Journal | ECS Transactions |
Volume | 16 |
Issue number | 2 |
DOIs | |
State | Published - 2009 |
Event | Proton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting - Honolulu, HI, United States Duration: 12 Oct 2008 → 17 Oct 2008 |
NREL Publication Number
- NREL/JA-560-43578
Keywords
- Fuel Cells
- PEM Fuel Cell