SnO2:F Coated Duplex Stainless Steel for PEM Fuel Cell Bipolar Plates

Heli Wang, John A. Turner

Research output: Contribution to journalArticlepeer-review

2 Scopus Citations


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 languageAmerican English
Pages (from-to)1879-1889
Number of pages11
JournalECS Transactions
Issue number2
StatePublished - 2009
EventProton Exchange Membrane Fuel Cells 8, PEMFC - 214th ECS Meeting - Honolulu, HI, United States
Duration: 12 Oct 200817 Oct 2008

NREL Publication Number

  • NREL/JA-560-43578


  • Fuel Cells
  • PEM Fuel Cell


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