Investigation of multi-coating process treated magnesium alloy as bipolar plate in polymer electrolyte membrane fuel cell

Feng, Kai; Guo, Xingwu; Li, Zhuguo; Yao, Chengwu; Wu, Yujuan

doi:10.1016/j.ijhydene.2016.02.147

Cited by 21 publications

(12 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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].…”

Section: Surface Characterization Methodsmentioning

confidence: 99%

“…The latter is a simple and quick measurement to de an approximate value, while in situ measurement offers more accurate reading operating individual cells or connecting them in a series to a larger unit [63]. On measurement variant consists of inserting a thin gold wire into an MEA during m ture (Figure 4) and subsequently measuring the voltage drop between the wire bipolar plate during fuel cell operation (Figure 5) and the resistance calculated from Corrosion and durability tests of fuel cells include analyses of ions leaching from bipolar plates (ICP-AES and ICP-MS) [60,61], MEAs, and GDL contamination after exposure expiration (SEM/EDS) [47,52]. A fuel cell for transport applications should be able to withstand 5000 h of operation without a significant decrease in power supply, while the number of ions released should not exceed 1 ppm/500 h [22,38].…”

Section: Fuel Cell Testmentioning

confidence: 99%

“…This system is then compressed at defined pressures at a constant current [63]. The current loads used range from tenths [31,36,60,66,67] to units of amperes [25,26,35,40,41,45,58,68]. However, a higher current can cause physical changes in the contact area at a microscopic level, e.g., due to local heating; therefore, Yoon recommended to avoid high currents and to measure properties at a current density To evaluate ex situ contact resistance and its dependence on pressure, the procedur by Davis has been proposed in the past and modified by Wang, and has been used by most authors.…”

Section: Fuel Cell Testmentioning

confidence: 99%

“…Despite the reduction in corrosion rate, coating defects and resulting localized corrosion occurred. Multilayer Cr/CCrx/C coating prepared using PVD technology on the nickel-plated alloy GW83 was also tested [60]. The nickel interlayer was tested on the basis of a positive influence on the corrosion resistance of steels.…”

Section: Other Metalsmentioning

confidence: 99%

See 3 more Smart Citations

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

2021

View full text Add to dashboard Cite

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.

show abstract

Section: Surface Characterization Methodsmentioning

confidence: 99%

Section: Fuel Cell Testmentioning

confidence: 99%

Section: Fuel Cell Testmentioning

confidence: 99%

Section: Other Metalsmentioning

confidence: 99%

See 2 more Smart Citations

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

2021

View full text Add to dashboard Cite

show abstract

“…Due to their low weight, good electrical conductivity, and biocompatible property, magnesium (Mg) alloys have been widely used in automotive, biomedical industries, and polymer electrolyte membrane fuel cells . However, Mg alloys exhibit the highest chemical reactivity among the construction materials (steel, aluminum, and titanium alloys) .…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Oxidation on Microstructure and Corrosion Behavior of the PVD Hf‐Coated Mg Alloy

Zhang

Wei

et al. 2017

Adv Eng Mater

View full text Add to dashboard Cite

Hafnium coatings are fabricated on magnesium alloys by magnetron sputtering and are further submitted to the thermal oxidation treatment at temperature of 200, 300, and 400 C. The thin hafnium oxide film and new grain boundaries are observed on the hafnium coatings during the appropriate treatment temperature (300 C). These changes in microstructure result in surface densification, oxidation, and low porosity of the treated coating that significantly decrease its susceptibility to corrosion. Consequently, the thermal oxidation treatment hafnium coating exhibits a more positive corrosion potential, lower corrosion current density, and higher polarization resistance than that of the as-deposited coating using an electrochemical system. Moreover, the enhanced adhesion of the treated coating produced by applying an appropriate treatment temperature facilitates an efficient longterm protection of magnesium alloy. Experimental SectionSample Preparation: The die cast AZ91D (Al: 9.1 wt%, Zn: 0.91 wt%, Mn: 0.033 wt%, Si: 0.04 wt%, Cu: 0.018 wt%, Fe:

show abstract

Corrosion and Materials Degradation in Electrochemical Energy Storage and Conversion Devices

Saji

2023

ChemElectroChem

View full text Add to dashboard Cite

Research and development on electrochemical energy storage and conversion (EESC) devices, viz. fuel cells, supercapacitors and batteries, are highly significant in realizing carbon neutrality and a sustainable energy economy. Component corrosion/ degradation remains a major threat to EESC device's long-term durability. Here, we provide a comprehensive account of the EESC device's corrosion and degradation issues. Discussions are mainly on polymer electrolyte membrane fuel cells, metal-ion and metal-air batteries and supercapacitors. Corrosion of bipolar plates/current collectors, carbon corrosion, electrode/ electrocatalyst degradation, and various mitigation approaches are detailed. The collective information provided could help develop EESC devices with better durability.

show abstract

Investigation of multi-coating process treated magnesium alloy as bipolar plate in polymer electrolyte membrane fuel cell

Cited by 21 publications

References 30 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

Effect of Thermal Oxidation on Microstructure and Corrosion Behavior of the PVD Hf‐Coated Mg Alloy

Corrosion and Materials Degradation in Electrochemical Energy Storage and Conversion Devices

Contact Info

Product

Resources

About