The study of Ni-based nano-crystalline and amorphous alloy coatings on AISI 304 stainless steel for PEM fuel cell bipolar plate application

Rajaei, V.; Rashtchi, Hamed; Raeissi, K.; Shamanian, M.

doi:10.1016/j.ijhydene.2017.04.098

Cited by 54 publications

(21 citation statements)

References 76 publications

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“…Increasingly, under the influence of pH testing of the fuel cell environment, and under the influence of the DOE requirements, less concentrated solutions with a higher pH are tested, such as sulfuric acid with a pH = 3 [27]. Some authors also recommend a higher pH, e.g., Rajael simulated cathodic conditions with an electrolyte of pH = 5 for the reason that, at the beginning of fuel cell operation the pH = 2-4, but after a while, it will increase to 6-7 [39].…”

Section: Electrochemical Testing Methodsmentioning

confidence: 99%

“…The morphology of a coating before and after exposure, its microstructure or its thickness can be monitored using electron microscopy (SEM and TEM), and using an EDS analyzer, the elemental composition or distribution of elements in a layer can be evaluated [21,39,60,79,81]. Surface roughness can be evaluated using profilometers [39] or atomic force microscopy (AFM) [9,21,35,77]. The concentration profile without the need of cross-section is made possible by GD-OES [35,47,75].…”

Section: Surface Characterization Methodsmentioning

confidence: 99%

“…The concentration profile without the need of cross-section is made possible by GD-OES [35,47,75]. Hydrophobic properties are also tested by measuring the contact angle [9,39,78], where a larger contact angle means a more efficient water drainage [78]. To a limited extent, authors have performed microhardness measurements [39,75,79] or, in the case of multi-layer systems, scratch tests [61,79].…”

Section: Surface Characterization Methodsmentioning

confidence: 99%

“…In addition to the already mentioned nitrides, carbides, carbon, and polymer coating, there are other coatings which are studied metals (Au, Ag, Ni, Ta, Nb, and Zr) [33,38,87,137], oxides (e.g., SnO 2 and PbO 2 ) [138][139][140][141], or various combinations, such as Ni-P, Ni-Mo [39]. Ni-Mo and Ni-Mo-P coatings prepared on 304 steel by electrodeposition form a more compact layer with the addition of phosphorus.…”

Section: Other Coatingsmentioning

confidence: 99%

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Metallic Material Selection and Prospective Surface Treatments for Proton Exchange Membrane Fuel Cell Bipolar Plates—A Review

2021

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The aim of this review is to summarize the possibilities of replacing graphite bipolar plates in fuel-cells. The review is mostly focused on metallic bipolar plates, which benefit from many properties required for fuel cells, viz. good mechanical properties, thermal and electrical conductivity, availability, and others. The main disadvantage of metals is that their corrosion resistance in the fuel-cell environment originates from the formation of a passive layer, which significantly increases interfacial contact resistance. Suitable coating systems prepared by a proper deposition method are eventually able to compensate for this disadvantage and make the replacement of graphite bipolar plates possible. This review compares coatings, materials, and deposition methods based on electrochemical measurements and contact resistance properties with respect to achieving appropriate parameters established by the DOE as objectives for 2020. An extraordinary number of studies have been performed, but only a minority of them provided promising results. One of these is the nanocrystalline β-Nb2N coating on AISI 430, prepared by the disproportionation reaction of Nb(IV) in molten salt, which satisfied the DOE 2020 objectives in terms of corrosion resistance and interfacial contact resistance. From other studies, TiN, CrN, NbC, TiC, or amorphous carbon-based coatings seem to be promising. This paper is novel in extracting important aspects for future studies and methods for testing the properties of metallic materials and factors affecting monitoring characteristics and parameters.

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Section: Electrochemical Testing Methodsmentioning

confidence: 99%

Section: Surface Characterization Methodsmentioning

confidence: 99%

Section: Surface Characterization Methodsmentioning

confidence: 99%

Section: Other Coatingsmentioning

confidence: 99%

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Metallic Material Selection and Prospective Surface Treatments for Proton Exchange Membrane Fuel Cell Bipolar Plates—A Review

2021

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“…At present, the researchers have discovered that the bulk amorphous alloy system is based on the transition metal Ni-Fe and added metalloid element B or Si. In addition to having extremely high hardness, it also has high toughness, which has attracted special attention in the industrial field [56].…”

Section: Ni-based Amorphous Alloy Coatingsmentioning

confidence: 99%

Current Research Status on Cold Sprayed Amorphous Alloy Coatings: A Review

et al. 2021

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Compared with traditional crystalline materials, amorphous alloys have excellent corrosion and wear resistance and high elastic modulus, due to their unique short-range ordered and long-range disordered atomic arrangement as well as absence of defects, such as grain boundaries and dislocations. Owing to the limitation of the bulk size of amorphous alloys as structural materials, the application as functional coatings can widely extend their use in various engineering fields. This review first briefly introduces the problems involved during high temperature preparation processes of amorphous coatings, including laser cladding and thermal spraying. Cold spray (CS) is characterized by a low-temperature solid-state deposition, and thus the oxidation and crystallization related with a high temperature environment can be avoided during the formation of coatings. Therefore, CS has unique advantages in the preparation of fully amorphous alloy coatings. The research status of Fe-, Al-, Ni-, and Zr-based amorphous alloy coatings and amorphous composite coatings are reviewed. The influence of CS process parameters, and powders and substrate conditions on the microstructure, hardness, as well as wear and corrosion resistance of amorphous coatings is analyzed. Meanwhile, the deposition mechanism of amorphous alloy coatings is discussed by simulation and experiment. Finally, the key issues involved in the preparation of amorphous alloy coatings via CS technology are summarized, and the future development is also being prospected.

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The performance research of TaC modified 316L bipolar plate for proton exchange membrane fuel cell

Zhang

Zhao

et al. 2021

Intl J of Energy Research

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The corrosion resistance and conductive property are two crucial factors affecting the performance of bipolar plates in proton exchange membrane fuel cell (PEMFC). In this research, a TaC coating is deposited on a 316L bipolar plate through plasma surface modification technology. The electrochemical property of bare 316L and TaC modified bipolar plate has been studied in a simulated PEMFC operation environment. The electrochemical analysis indicates that the performance of bipolar plate has been significantly improved due to the effective effect of TaC modified coating. An obviously decreased corrosion current density is represented by TaC modified bipolar plate and the corrosion potential is more positive in a simulated electrolyte environment. A satisfactory water contact angle of 80.5 is obtained to be beneficial to the water management of PEMFC after surface modification. Furthermore, the TaC-316L bipolar plate presents a minor interfacial contact resistance (ICR) and maintains a favourable result after the potentiostatic polarization test.

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The study of Ni-based nano-crystalline and amorphous alloy coatings on AISI 304 stainless steel for PEM fuel cell bipolar plate application

Cited by 54 publications

References 76 publications

Metallic Material Selection and Prospective Surface Treatments for Proton Exchange Membrane Fuel Cell Bipolar Plates—A Review

Metallic Material Selection and Prospective Surface Treatments for Proton Exchange Membrane Fuel Cell Bipolar Plates—A Review

Current Research Status on Cold Sprayed Amorphous Alloy Coatings: A Review

The performance research of TaC modified 316L bipolar plate for proton exchange membrane fuel cell

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