Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates

Chanda, Uttam K.; Padhee, Satya Prakash; Pathak, Anil D.; Roy, Soma; Pati, Soobhankar

doi:10.1007/s40243-019-0158-8

Cited by 12 publications

(3 citation statements)

References 31 publications

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“…This phenomenon happens due to MBF67 brazing filler metal having a high chromium composition (wt. %), which increases corrosion resistance [26]. Furthermore, it is noticed that the boron (B) element in EDS analysis (Table 4) had higher at.…”

Section: Analysis Of the Brazed Jointsmentioning

confidence: 93%

Brazing of Porous Nickel to Copper and Stainless Steel: Microstructure and Mechanical Properties

Zaharinie,

Ikmal,

Rozaimay

et al. 2024

KEM

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A porous nickel (Ni) was brazed to copper (Cu) and stainless steel 304 (SS304) using VZ2250 and MBF67 brazing filler metal with a composition of 77.4Cu-9.3Sn-7.0Ni-6.3P and 64.5Ni-25Cr-6P-1.5Si (Cu: Copper, Sn: Tin, Ni: Nickel, P: Phosphorus, Cr: Chromium, Si: Silicon), respectively for joint microstructure and mechanical properties analysis. Porous Ni with a pore density of 15 pores per inch (PPI) was sandwiched between Cu/VZ2250 and MBF67/SS304. A brazed joint of Cu/Porous Ni/SS304 with VZ2250 and MBF67 brazing filler metal was prepared in a high vacuum furnace at different brazing times of 5, 10, and 15 minutes for 1015 °C with a heating and cooling rate of 10 °C/min, respectively for comparison purpose. The microstructure and mechanical properties of the brazed joint were investigated to identify the joint ability after the brazing process. Scanning Electron Microscope (SEM) equipped with Energy Dispersive X-Ray Spectroscopy (EDS) confirmed the interfacial microstructure by the formation of the diffusion filler metal (dark grey colour) for the Cu/Porous Ni/SS304 with VZ2250 and MBF67 brazing filler metal. For shear strength tests, the value decreases with an increase in the brazing time. The shear strength tests for the brazed joint of Cu/Porous Ni/SS304 with VZ2250 and MBF67 brazing filler metal show the maximum shear strength test value can be achieved for the brazing time of 5 minutes. The decreasing shear strength value was observed with differences in structural data of porous Ni due to the softening after the brazing process. Keywords: Brazing, Microstructure, Porous Nickel, Shear Strength.

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Section: Analysis Of the Brazed Jointsmentioning

confidence: 93%

Brazing of Porous Nickel to Copper and Stainless Steel: Microstructure and Mechanical Properties

Zaharinie,

Ikmal,

Rozaimay

et al. 2024

KEM

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show abstract

“…alloys, amorphous or polymers, and composites have been coated on the metallic BPPs. In our previous studies, we demonstrated a cost-effective electrodeposition technique to deposit corrosion resistance amorphous Ni-Cr-P [11,12] and Ni-Mo-Cr-P [13] coatings for AISI 1020 low carbon steel BPPs. Although the electrodeposited coatings are cost-effective, corrosion resistance is still not in the acceptable range of the US DOE target i.e.…”

Section: Introductionmentioning

confidence: 99%

Corrosion performance of graphene oxide coated 304 SS in PEMFC environment

et al. 2021

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In this work, an electrophoretic deposition technique was used to deposit graphene oxide (GO) on 304 stainless steel. Its corrosion performance was evaluated in a simulated polymer electrolyte membrane fuel cell environment. The corrosion current density (icorr) and interfacial contact resistance (ICR) were measured at 8.9 µA/cm2 and 19.3 mΩ cm2, respectively. The icorr of GO coated 304SS is several orders lower than bare SS 304. Similarly, the ICR of GO coated 304SS is nearly half of bare 304SS at a compaction pressure of 150 N/cm2. The potentiodynamic polarization plot indicates the prevalence of multiple corrosion mechanisms. A prolonged corrosion study for 30 days immersed in the simulated PEM cell environment shows the formation of rounded pits that corroborate the activity of pitting corrosion.

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“…This combination increases the electrical conductivity at the same time and decreases the mechanical strength, such as tensile strength. [43][44][45] These composites are needed more curing time. Hence, it is not suitable for mass production.…”

mentioning

confidence: 99%

Development and experimental analysis of polymer based composite bipolar plate usingAquila Taguchioptimization: Design of experiments

et al. 2022

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In the proton exchange membrane fuel cells, the bipolar plates (BPs) are being widely used in multifunctional mode. They have many unique properties, including prevention of coolant and gas leakages, dissipation of heat from active portions, distribution of air, gas, and fuel uniformly, electric current conduction between cell to cell as a chain, etc. This experimental work was intense to fabricate polymer-based composite bipolar plates using hybrid combinations. Composites are prepared by using carbon black (CB), glass fiber (GF), and graphite (G) with epoxy and silicone resins. The mixing of composite materials with resins is controlled by the Aquila Taguchi optimization (ATO) method through the L16 Orthogonal Array (OA). Mixing parameters are chosen as rotational speed (20, 30, 40, and 50 rpm), mixing time (10, 15, 20, and 25 min), and mixing temperature (25, 30, 35, and 40 C). Influencing these parameters increases the electrical conductivity (S/cm) and flexural strength (MPa) of the newly prepared bipolar plate composites. From this analysis, highest electrical conductivity is obtained, such as 268.361 S/cm. Similarly, extreme flexural strength occurred at 134.90 MPa.

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Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates

Cited by 12 publications

References 31 publications

Brazing of Porous Nickel to Copper and Stainless Steel: Microstructure and Mechanical Properties

Brazing of Porous Nickel to Copper and Stainless Steel: Microstructure and Mechanical Properties

Corrosion performance of graphene oxide coated 304 SS in PEMFC environment

Development and experimental analysis of polymer based composite bipolar plate usingAquila Taguchioptimization: Design of experiments

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