Electrochemical Properties of NiO-YSZ Thin Films on 316 Stainless Steel Bipolar Plates Under a Simulated PEMFC Environment

Abstract

The corrosion resistance of 316L stainless steel coated with NiO-YSZ (Ni added yttria stabilized zirconia) was examined in a proton exchange membrane fuel cell (PEMFC) environment. The NiO-YSZ coating was carried out using a sol-gel dip coating method, and the corrosion resistance and interfacial contact resistance (ICR) were determined by the composition and morphology of the NiO-YSZ film. The corrosion resistance increased with increasing Ni content in the NiO-YSZ film, but rapid corrosion was observed when the YSZ film contained more than 15 wt % Ni due to surface cracks. The polarization resistance was improved by several orders of magnitude when 316L stainless steel was coated with a 15 wt % NiO-YSZ film compared to bare 316L. The ICR of the NiO-YSZ film was decreased to that of bare 316L when the YSZ film contained 25 wt % NiO, suggesting the possible application of NiO-YSZ coated stainless steel for a bipolar plate.

Minimization of corrosion in aquatic environment – a review

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Marine Corrosion Protective Coatings of Hexagonal Boron Nitride Thin Films on Stainless Steel

“…Polymeric coatings and paints are widely used in industries for corrosion protection. − Multiphase coating consisting of three-layer TiO 2 –Al 2 O 3 nanocomposite films also showed good corrosion resistance when applied on 316L stainless steel (316LSS) by sol–gel process . In the case of polymer paints, perfluorooctadecanoic acid (PFOA) PFS polymer paints exhibited enhanced corrosion protection.…”

Effect of Magnetic Field on Corrosion Behaviors of Gold-Coated Titanium as Cathode Plates for Proton Exchange Membrane Fuel Cells

“…Besides, it has attracted more and more attention and considered as a promising and ideal coating material for metal BPPs for the advantages in coating costs and power gain. 28,38 To mitigate the corrosion issue, numeric coating techniques have been also applied on Ti or other metal BPPs for their applications in z E-mail: qichen@mail.hust.edu.cn; xthan@mail.hust.edu.cn PEMFC, such as the CrN coatings prepared by plasma nitriding, 39 the (NiO-YSZ Ni doped yttria stabilized zirconia) coating using a sol-gel dip coating method, 40 the NiCrBSi coating by High-velocity Oxygen-fuel (HVOF) spray, 41 a nanometric Ti/TiN multi-layer coating by cathodic arc evaporation Physical Vapor Deposition (PVD), 42 TiN coated Ti by multi-arc ion plating (AIP), 27 a TiN/Ti and TiO 2 /Ti double layers deposited using the electromagnetic-fieldsuper-positioned DC and Radio Frequency (RF) magnetron sputtering, 43 a Ti 3 SiC 2 coating by pulse magnetron sputtering 44 and amorphous carbon film by closed field unbalanced magnetron sputter ion plating. 45 Among these coating preparation methods, PVD techniques include evaporation, sputtering as well as their hybrid process are widely used to deposit the corrosion-resistant coatings for the metal BPPs owing to their advantages in the high adhesion strength with the steel substrate, relative quick deposition rate, controllable and easily adjustable in the coating composition.…”