Evaluation of a Cr3C2(NiCr) Coating Deposited on s4400 by Means of an HVOF Process and Used for Flow Plates of PEM Fuel

Rendón-Belmonte, M.; Pérez-Quiroz, J. T.; Terán-Guillén, J.; Porcayo-Calderón, J.; Torres-Acosta, A. A.; Orozco, G.

doi:10.1016/s1452-3981(23)13396-7

Cited by 12 publications

(2 citation statements)

References 5 publications

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“…The surface of BPs is, therefore, not even, which brings additional difficulty in achieving uniform and defect-free coatings, depending on the specific curvature of the local structure in flow fields. For example, in the preparation of Cr 3 C 2 coatings [101] on metallic BPs via HVOF spraying, micro-cracks occurred in the coating at the rib edge of flow fields, impairing the structural integrity of the as-sprayed coating. Cross-sectional morphologies of the coating defects at a rib edge of BPs are shown in Figure 7e,f [9].…”

Section: Discussionmentioning

confidence: 99%

“…For both PEM-based cells, performance degradation originating from metallic BPs includes [99] an increase in interfacial contact resistance (ICR) due to surface oxidation of BPs, an increase in ohmic resistance in PEM electrolyte and polarization resistance in electrodes due to the poisoning effect of the dissolved metal cations. In order to protect BPs from corrosion, a variety of low melting temperature alloys (e.g., NiCr [100], Co(Ni)CrAlY [100]) and non-oxide ceramics (e.g., NiCrBSi [100], Cr 3 C 2 [101]) have been used to coat the metallic BPs by means of the HVOF spraying method.…”

Section: Application Of Hvof-sprayed Coatings In Pem Cellsmentioning

confidence: 99%

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Thermal Sprayed Protective Coatings for Bipolar Plates of Hydrogen Fuel Cells and Water Electrolysis Cells

Liu,

Tao,

Wang

et al. 2024

Coatings

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As one core component in hydrogen fuel cells and water electrolysis cells, bipolar plates (BPs) perform multiple important functions, such as separating the fuel and oxidant flow, providing mechanical support, conducting electricity and heat, connecting the cell units into a stack, etc. On the path toward commercialization, the manufacturing costs of bipolar plates have to be substantially reduced by adopting low-cost and easy-to-process metallic materials (e.g., stainless steel, aluminum or copper). However, these materials are susceptible to electrochemical corrosion under harsh operating conditions, resulting in long-term performance degradation. By means of advanced thermal spraying technologies, protective coatings can be prepared on bipolar plates so as to inhibit oxidation and corrosion. This paper reviews several typical thermal spraying technologies, including atmospheric plasma spraying (APS), vacuum plasma spraying (VPS) and high-velocity oxygen fuel (HVOF) spraying for preparing coatings of bipolar plates, particularly emphasizing the effect of spraying processes on coating effectiveness. The performance of coatings relies not only on the materials as selected or designed but also on the composition and microstructure practically obtained in the spraying process. The temperature and velocity of in-flight particles have a significant impact on coating quality; therefore, precise control over these factors is demanded.

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Section: Discussionmentioning

confidence: 99%

Section: Application Of Hvof-sprayed Coatings In Pem Cellsmentioning

confidence: 99%

Thermal Sprayed Protective Coatings for Bipolar Plates of Hydrogen Fuel Cells and Water Electrolysis Cells

Liu,

Tao,

Wang

et al. 2024

Coatings

View full text Add to dashboard Cite

show abstract

Corrosion Investigation of Chromium Nitride and Chromium Carbide Coatings for PEM Fuel Cell Bipolar Plates in Simulated Cathode Condition

2016

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Transition metals nitrides and carbides are used as coatings on bipolar plates for proton exchange membrane fuel cells (PEMFCs) due to their suitable electrical conductivity and corrosion resistance. Chromium electroplated AISI 316L stainless steel bipolar plates were treated by plasma nitriding and solid carburizing to form chromium nitride and chromium carbide, respectively. The presence of CrN/Cr2N and Cr7C3/Cr23C6 was verified by X‐ray diffractometry (XRD) in chromium nitride and chromium carbide coatings, respectively. The corrosion behavior of coatings was investigated by potentiodynamic polarization, potentiostatic polarization and electrochemical impedance spectroscopy (EIS) in simulated cathode condition. Coated samples showed better corrosion behavior than untreated bare sample. EIS results indicated decrease in corrosion current density after 500 hours, however coatings acted as barrier against solution access to substrate. Corrosion current densities of coatings were close to targets of United Stated department of energy (DOE).

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Effect of High-Chromium Ferrous-Based TiC Composite Coating on Microstructural and Corrosion Properties of Steels

Buytoz

Demirören

Kaya

2023

Trans Indian Inst Met

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Evaluation of a Cr3C2(NiCr) Coating Deposited on s4400 by Means of an HVOF Process and Used for Flow Plates of PEM Fuel

Cited by 12 publications

References 5 publications

Thermal Sprayed Protective Coatings for Bipolar Plates of Hydrogen Fuel Cells and Water Electrolysis Cells

Thermal Sprayed Protective Coatings for Bipolar Plates of Hydrogen Fuel Cells and Water Electrolysis Cells

Corrosion Investigation of Chromium Nitride and Chromium Carbide Coatings for PEM Fuel Cell Bipolar Plates in Simulated Cathode Condition

Effect of High-Chromium Ferrous-Based TiC Composite Coating on Microstructural and Corrosion Properties of Steels

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