Ni–P and Ni–Co–P coated aluminum alloy 5251 substrates as metallic bipolar plates for PEM fuel cell applications

Fetohi, Amani E.; Hameed, R.M. Abdel; El–Khatib, K.M.; Souaya, Eglal R.

doi:10.1016/j.ijhydene.2012.01.145

Cited by 65 publications

(23 citation statements)

References 50 publications

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“…Higher amount of cobalt was deposited in all formed coatings. This observation agreed well with our earlier work on AA5251 coated with NieCoeP using electroless and electroplating techniques [41]. It was found that the coating formed by electroless method contains a trace amount of cobalt.…”

Section: Sem and Edx Analyses Of Niecoep Coated Aluminum Substratessupporting

confidence: 93%

“…As a result of dipping Al substrate in the zincating solution, its oxide layer and a part of aluminum surface are dissolved, followed by Zn deposition [38e40]. The steps of zincating process have been mentioned in details in our earlier work [41]. In brief, cleaning the substrate requires its immersion in acetone for 30 s and then in 1 M H 2 SO 4 solution for 10 s. The zincating solution is a mixture of 200 g NaOH and 10 g ZnO dissolved in 1 L H 2 O.…”

Section: Zincating Processmentioning

confidence: 99%

“…The used setup was illustrated in our earlier work [41]. Coated aluminum substrate was inserted in the middle and covered from both sides with two carbon papers.…”

Section: Interfacial Contact Resistance Measurementsmentioning

confidence: 99%

“…This could be attributed to higher copper content in their bare surfaces and relatively lower cobalt : nickel weight ratio [41] in NieCoeP coatings with cracks prevalence.…”

Section: Potentiostatic Polarization Tests Of Niecoep Coated Aluminummentioning

confidence: 99%

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Study of different aluminum alloy substrates coated with Ni–Co–P as metallic bipolar plates for PEM fuel cell applications

Fetohi

Hameed

El–Khatib

et al. 2012

International Journal of Hydrogen Energy

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Section: Sem and Edx Analyses Of Niecoep Coated Aluminum Substratessupporting

confidence: 93%

Section: Zincating Processmentioning

confidence: 99%

“…The used setup was illustrated in our earlier work [41]. Coated aluminum substrate was inserted in the middle and covered from both sides with two carbon papers.…”

Section: Interfacial Contact Resistance Measurementsmentioning

confidence: 99%

“…This could be attributed to higher copper content in their bare surfaces and relatively lower cobalt : nickel weight ratio [41] in NieCoeP coatings with cracks prevalence.…”

Section: Potentiostatic Polarization Tests Of Niecoep Coated Aluminummentioning

confidence: 99%

See 2 more Smart Citations

Study of different aluminum alloy substrates coated with Ni–Co–P as metallic bipolar plates for PEM fuel cell applications

Fetohi

Hameed

El–Khatib

et al. 2012

International Journal of Hydrogen Energy

Self Cite

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“…Electroless deposition offered an alternate and attractive methods of producing a thin and uniform coating ,and it had been known to obtain a Special performance coating when compared to electroplating.Electroless Ni-Co-P alloy had advantages from both Ni-P alloy and Co-P alloy . Ni-Co-P alloy coating possed unique properties such as high coercive force, the smaller residual magnetism, high wear resistance, high corrosion resistance and high density magnetic that were widely used in compact disk, MEMS, surface anti-corrosion, aerospace and other fields [1][2][3][4][5][6] . In the present,main preparation methods consisted of electroless plating method, electroplating method and sputtering method, etc., in which the electroless plating was a common method for obtaining Ni-Co-P alloy.Although the plating rate, stability and bath life subjected to certain restrictions, but because of its simple operation, uniform coating, high density and hardness characteristics, it had been widely used in many fields [7][8][9][10][11] .In this paper, the AZ31B magnesium alloy was used as matrix to make electroless Ni-Co-P alloy under the alkaline conditions.…”

Section: Introductionmentioning

confidence: 99%

Study on Preparation and Property of Ni-Co-P Coatings of AZ31B Magnesium Alloy

Zeng¹,

Zheng²,

Luo³

et al. 2015

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

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Abstract. AZ31B was used as the basic material in electroless Plating of Ni-Co-P, The optimium formula and process conditions were obtained by using the orthogonal experiment methods. XRD, SEM and EDS were used to characterize phase structure,compositon and morphology of Ni-Co-P coating. The morphology,corrosion resistance, composition ,hardness,thickness and binding force of coating are measured and analysed. The optimum formula and the technological conditions were gained as follows：26.0g/L NiSO 4 ·6H 2 O ，28.0g/L CoSO 4 ·7H 2 O，24.0g/L NaH 2 PO 2 ·H 2 O，80.0g/L Na 3 C 6 H 5 O 7 ·2H 2 O，60.0g/L NH 4 F ,temperature of 90.0℃,0.001g/L KI, 0.05g/L SDBS ,the plating time of 2.0 h and pH of 8.0.Under this condition, the coating had stronger corrosion resistance, drop time for KMnO 4 solution was 272s; The hardnesses was 229.60HV ;the deposition rate was faster, up to 53.33 g·m -2 ·h -1 ;thickness was 12.43 μm;the surface of the coating was uniform;the distribution of porosity was smaller;there was well-bonded with the substrate.

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Highly Catalytic Amorphous Ni–P Synthesized via Pulsed Electrodeposition

Hasannaeimi

Mukherjee

2019

Adv Eng Mater

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Ni-P coatings have attracted wide attention due to their good tribological properties, corrosion resistance, and high catalytic activity.The surface properties impact the overall catalytic performance of Ni-P as electrocatalysts. In this study, highly catalytic amorphous Ni-P electrodeposits are synthesized using pulsed electrodeposition technique. Pulse parameters show a significant effect on the morphology, crystallinity, and electro-catalytic activity of the deposits. The Ni-P deposits are found to be amorphous up to the duty cycle of 50%, whereas higher duty cycles (toward direct current deposition) result in a transition to nanocrystalline structure. This is attributed to an indirect reduction process involving intermediate phosphine leading to co-deposition of phosphorus and nickel.Change in pulse frequency results in significant variations in surface morphology. Methanol electro-oxidation in alkaline environment is studied as a function of surface morphology for the amorphous Ni-P catalysts. Up to four-fold increase in oxidation peak current is observed for nano-morphologies with large electrochemical surface area synthesized at pulse frequency of 50 Hz. This demonstrates the potential of pulsed electrodeposition as a versatile toolbox for obtaining highly catalytic amorphous Ni-P as a potential substitute for expensive noble-metals used in direct alcohol fuel cells.

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Ni–P and Ni–Co–P coated aluminum alloy 5251 substrates as metallic bipolar plates for PEM fuel cell applications

Cited by 65 publications

References 50 publications

Study of different aluminum alloy substrates coated with Ni–Co–P as metallic bipolar plates for PEM fuel cell applications

Study of different aluminum alloy substrates coated with Ni–Co–P as metallic bipolar plates for PEM fuel cell applications

Study on Preparation and Property of Ni-Co-P Coatings of AZ31B Magnesium Alloy

Highly Catalytic Amorphous Ni–P Synthesized via Pulsed Electrodeposition

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