Influence of CrN-coating thickness on the corrosion resistance behaviour of aluminium-based bipolar plates

Barranco, J.; Barreras, Félix; Lozano, Antonio; Maza, Mario

doi:10.1016/j.jpowsour.2010.11.069

Cited by 90 publications

(36 citation statements)

References 19 publications

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“…To lighten the stack, it will be constructed with monopolar aluminum plates, coated with chromium nitride by physical vapor deposition [9,10]. With these elements, the total stack mass is 3.86 kg.…”

Section: Fuel Cell Stackmentioning

confidence: 99%

Use of fuel cell stacks to achieve high altitudes in light unmanned aerial vehicles

Renau

Lozano

Barroso

et al. 2015

International Journal of Hydrogen Energy

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A study is presented to determine if substituting an internal combustion engine (ICE) by an electric motor powered by a fuel cell stack can be a viable option to increase the service ceiling of an available light unmanned aerial vehicle (UAV), extending it to 10,000 m. As a first condition, the stack has to be capable of supplying the minimum power required for horizontal leveled flight at this altitude, which is a function of the UAV total mass. A second step examines if the UAV can transport the energy required to reach the desired service ceiling without exceeding the maximum mass that can be loaded, considering that both hydrogen and oxygen have to be carried on-board. A particularly light PEM fuel cell stack is proposed as a suitable power source. A realistic system is described to store the required amount of reactant gases maintaining the mass below the allowable limits. Results indicate that with its aerodynamic characteristics, the UAV should be capable of ascending up to 10,000 m with the described fuel cell and gas storage system. Some multivariable maps that include service ceiling, total payload and required power are provided to perform this type of analysis.Keywords: PEM fuel cell, Hydrogen, High-temperature, UAV, Aerodynamics * Corresponding author. E-Mail: alozano@litec.csic.es Nomenclature Latin alphabet

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Section: Fuel Cell Stackmentioning

confidence: 99%

Use of fuel cell stacks to achieve high altitudes in light unmanned aerial vehicles

Renau

Lozano

Barroso

et al. 2015

International Journal of Hydrogen Energy

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“…The formation of a protective film on the BPPs with physical-vapor deposition (PVD) is proven to be an effective method and has been extensively studied. [19][20][21][22][23][24] Many researchers focused on the multilayer, while fewer on the composite film.…”

Section: Introductionmentioning

confidence: 99%

ZrMoN films on 304 stainless steel as bipolar plates for PEMFCs using physical-vapor-deposition (PVD) technology

Zheng¹,

Chen²

2017

Mater. Tehnol.

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ZrMoN films were deposited on a 304 stainless-steel (SS304) substrate with a radio-frequency (RF) reactive magnetron-sputtering system and the properties were changed by adjusting the power of the Mo target. The corrosion behaviors of the ZrMoN films were investigated with potentiodynamic tests and electrochemical impedance spectroscopy (EIS) under the condition of an aerated 0.5M H2SO4 + 1,99 mg/L NaF solution at 70°C. The results revealed that all samples with ZrMoN films have good hydrophobicity. The XRD test showed that the ZrMoN film is the substitutional solid solution of Mo atoms into ZrN films. As an overall evaluation, the power of the Mo target is 30W. A coated sample displays the best corrosion resistance in the cathode of the PEMFC environment when the power of the Mo target is considered, which indicates that with an increase of the power of the Mo target, the solid solubility also increases; but with a continuous increase of the Mo-target power, the solubility increases and a lattice distortion also occurs, leading to an increase in defects. Keywords: ZrMoN, corrosion behavior, bipolar-plate material, physical-vapor-deposition technology (PVD) ZrMoN prevleke so bile nane{ene na substrat 304 nerjavnega jekla (SS 304) z radiofrekven~nim reaktivnim (angl. RF) magnetronskim napr{evalnikom in lastnosti so bile spremenjene s prilagoditvijo mo~i Mo tar~e. Korozijsko obna{anje prevlek ZrMoN smo raziskovali s potenciodinamskimi preizkusi in elektrokemijsko impedan~no spektroskopijo (EIS) v raztopini 0,5 M H2SO4 + 1,99 mg/L NaF pri temperaturi 70°C. Rezultati so pokazali, da imajo vsi vzorci z ZrMoN prevlekami dobro hidrofobnost. XRD-analiza ka`e, da je prevleka ZrMoN nadomestna trdna raztopina atomov Mo v ZrN plasti. Rezultati ka`ejo najbolj{o korozijsko odpornost na katodi v okolju PEMFC pri mo~i Mo tar~e 30 W, kar ka`e, da se s pove~anjem mo~i Mo pove~uje tudi trdna topnost. Vendar pa se s kontinuiranim pove~evanjem mo~i Mo tar~e neprestano pove~uje tudi topnost, zato pride do popa~enja kristalne mre`e, kar povzro~i pove~anje napak. Klju~ne besede: ZrMoN, korozijsko obna{anje, bipolarni material, tehnologija nana{anja iz parne faze (PVD)

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“…[14][15][16] Recent studies on the CrN coating on metal bipolar plates for fuel cells have been reported to improve corrosion resistance and interfacial contact resistance. [17][18][19][20][21][22][23] Brady et al developed a preferential thermal nitridation process to form pinhole-free CrN coatings on a Ni-Cr alloy substrate, which showed a lot of promise with excellent corrosion resistance and negligible contact resistance. 24 They pointed out that dense, electrically conductive, corrosion-resistant CrN surfaces can be formed on Ni-Cr alloys with the Cr level of less than 35 wt% by heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Prevention of Chromium Nitride Coating with an Application to Bipolar Plate Materials

et al. 2014

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The corrosion properties of chromium nitride (CrN) coating on nickel have been evaluated in order to improve the anti-corrosion of metallic bipolar plate materials with applications such as redox flow batteries. The CrN layers are prepared by nitridation of electroplated Cr layers with different thickness. The nitrogen content of CrN coating layers varies from 0.5 to 4.2 wt% depending on nitriding time and coating layer thickness. Electrochemical and chemical corrosion behaviors are investigated by potentiodynamic polarization test in 5% sulfuric acid and by immersion test in 50% sulfuric acid, respectively. Electrochemical analysis of corrosion potential and corrosion current density as well as passivation behavior and chemical corrosion rate prove conclusively that an intact thin CrN layer is more corrosion resistant than thicker layers where cracks are developed. Sheet resistance of CrN coating layers before and after the corrosion test exhibits no significant difference. The improved corrosion resistance and the excellent stability of CrN coating layers suggest an efficient anti-corrosion method for metallic bipolar plate materials.

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Influence of CrN-coating thickness on the corrosion resistance behaviour of aluminium-based bipolar plates

Cited by 90 publications

References 19 publications

Use of fuel cell stacks to achieve high altitudes in light unmanned aerial vehicles

Use of fuel cell stacks to achieve high altitudes in light unmanned aerial vehicles

ZrMoN films on 304 stainless steel as bipolar plates for PEMFCs using physical-vapor-deposition (PVD) technology

Corrosion Prevention of Chromium Nitride Coating with an Application to Bipolar Plate Materials

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