Corrosion Behavior of Pure Aluminum in the Simulated PEMFC Environment

Alam, Md. Ashraful; Jahan, Aklima; Minoura, Ayumu; Yonezawa, Sekai; Suzuki, Eiichi; Yashiro, Hitoshi

doi:10.3323/jcorr.70.64

Cited by 6 publications

(7 citation statements)

References 14 publications

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“…Therefore, the corrosion resistance required for the reaction gas isolation plate would not be as high as required for the flow path forming material. In our previous studies, some techniques were followed to check and reduce the corrosion resistance of Al used as bipolar plate in PEMFC in different conditions (31)(32)(33). Yet some study for modification and surface treatment is required to evaluate the Al based materials for using in PEMFC as bipolar plate.…”

Section: Fig 1 Overview Of a Pemfcmentioning

confidence: 99%

(Digital Presentation) Corrosion Behavior of Aluminum-Carbon Composite Bipolar Plates in Polymer Electrolyte Membrane Fuel Cells

Jahan¹,

Alam²,

Yonezawa³

et al. 2022

ECS Trans.

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Bipolar plate, aluminum is one of the most promising alternatives that can capable of uniform distribution of reactive gases over active areas and removal of the heat and exhaust water from the PEMFC. In this work, PEM fuel cell was operated using the bipolar plate constructed of two materials: a channel former made of glassy carbon and a gas isolation plate made of aluminum. Aluminum gas isolation plate at cathode side remained glossy after even1000 h cell operation. In contrast, an oxide layer with a thickness of about 1 μm was formed on the gas isolation plate at anode side. In the simulated corrosion test, a thick oxide layer was formed when aluminum was immersed in water while only a thin oxide layer was formed in the saturated water vapor. The microscopic images, scanning electron microscopy (SEM) images, energy dispersive X-ray (EDX) spectra and transmission electron microscopy (TEM) images were taken to evaluate the surface morphology, elemental composition and other analyses.

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Section: Fig 1 Overview Of a Pemfcmentioning

confidence: 99%

(Digital Presentation) Corrosion Behavior of Aluminum-Carbon Composite Bipolar Plates in Polymer Electrolyte Membrane Fuel Cells

Jahan¹,

Alam²,

Yonezawa³

et al. 2022

ECS Trans.

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“…[34,4] Hence, the corrosion studies of Al based materials have received significant thought by the scientist because of their wide industrial and economic applications. [35][36][37][38]6] Previous reports have focused on the corrosion study of Al and Al based materials such as Al alloys in weak acidic media using hydrochloric acid, [39] sulfuric acid, [40,41] aqueous alkaline solutions, [42][43][44] sodium chloride solution with essential oil varying concentrations, [45] neutral dilute salt solutions, halide media, [46,42] sodium sulfate solutions, [47] carbon dioxide aqueous solutions, [48] sulfuric acid and sodium fluoride media at 80 °C, [49] dilute sodium fluoride sulfate solutions in PEFC, [50,51] hydrochloric acid solutions, [52] and deaerated pure water. [53] Literally, the metallic materials corrosion in acidic media matters significant costs.…”

Section: Introductionmentioning

confidence: 99%

Fluoride Ions Effect on the Corrosion Behavior of Pure Aluminum in Deaerated 0.05 M Sulfuric Acid Solutions

et al. 2023

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The corrosion study of aluminum‐based materials is the topic of a great scientific attention because of increasing the applications in many sectors of these materials. The fluoride ions (F−) effect on the corrosion behavior of pure aluminum in deaerated 0.05 M sulfuric acid (H2SO4) solutions at 25 °C was investigated. The electrochemical measurements such as open circuit potential and potentiodynamic polarization were accomplished to study the effect of fluoride and sulfate ions present in the test solutions. The optical microscopic and atomic force microscopic images were taken to view the morphologies and surface roughness of pure aluminum which coincidence with the corrosion rates found from the immersion of the test specimens using weight loss method. The surface morphology and elemental compositions of pure aluminum was evaluated by scanning electron microscope and energy dispersive X‐ray spectroscopy, respectively. The results showed that the general corrosion was formed on the surface of pure aluminum. It is also revealed that the surface roughness and amount of corrosion of pure aluminum were increased by the presence of even a very small amount of fluoride ions in deaerated sulfuric acid solutions.

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“…In simulated conditions, earlier studies have concerted on the corrosion features of Al in some dilute acidic solutions, such as sulfuric acid, hydrochloric acid, , sulfuric acid with hydrogen fluoride media, , sodium sulfate with sodium fluoride solution, − and seawater . It is known that the typical operating environment for the PEM FC includes a pH value in the range of 3 to 6, which is weakly acidic, whereas BPPs are typically handled on crevice corrosion by discharging the major anions such as F – , SO 4 2– , Cl – , etc., from the perfluoro-sulfonic acid membrane, and the temperature can reach up to 80 °C. − …”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Pure Aluminum in the Simulated and Real Environments for Use as a Bipolar Plate Component in Polymer Electrolyte Membrane Fuel Cells

Jahan,

Alam,

Suzuki

et al. 2023

Ind. Eng. Chem. Res.

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Due to oxygen- or hydrogen-rich environments, metallic bipolar plates in proton exchange membrane (PEM) fuel cells (FCs) are extremely prone to corrosion. In this work, the corrosion behavior of pure aluminum (Al) and its correlation between the simulated and real environments in the PEM FC were investigated, where the word “real” means the recovered solutions that were collected from the cathode and anode of the PEM FC during the 500 h of single-cell power generation test. The single-cell power generation test was performed for 500 h using graphite, bare Al, and TiN-SBR-coated Al as the reaction gas isolating plates for use as bipolar plates in the PEM FC. The corrosion rate of pure Al was calculated after immersion in different solutions, such as distilled water, sulfate ions, fluoride ions, and their combined solutions. The electrochemical behavior of pure Al was evaluated by polarization tests, which showed that the higher corrosion resistance was found in the solutions with higher pHs. Corrosion morphology, surface roughness, structures of corrosion products, and elemental compositions in simulated and real environments were measured and examined. The results revealed that higher and lower amounts of oxide layers as corrosion products were found for the presence of fluoride and sulfate ions, respectively, in the tested solutions. In addition, the study of the cathode and anode sides of used bipolar plates before and after the single-cell power generation test reports that the light and whitish corrosion products were captured on the anode side, and interestingly, almost no corrosion layers were seen on the cathode side of the bipolar plates after PEM FC operation. Thus, it was suggested that Al can be considered one of the most suitable materials for use as bipolar plates in a PEM FC, where the higher voltage and improved corrosion resistance were found using TiN-SBR-coated Al plates.

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Corrosion Behavior of Pure Aluminum in the Simulated PEMFC Environment

Cited by 6 publications

References 14 publications

(Digital Presentation) Corrosion Behavior of Aluminum-Carbon Composite Bipolar Plates in Polymer Electrolyte Membrane Fuel Cells

(Digital Presentation) Corrosion Behavior of Aluminum-Carbon Composite Bipolar Plates in Polymer Electrolyte Membrane Fuel Cells

Fluoride Ions Effect on the Corrosion Behavior of Pure Aluminum in Deaerated 0.05 M Sulfuric Acid Solutions

Corrosion Behavior of Pure Aluminum in the Simulated and Real Environments for Use as a Bipolar Plate Component in Polymer Electrolyte Membrane Fuel Cells

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