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

Alam, Md. Ashraful; Jahan, Aklima; Suzuki, Eiichi; Yashiro, Hitoshi

doi:10.1002/slct.202300379

Cited by 3 publications

(4 citation statements)

References 66 publications

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“…Therefore, the overall life and belongings will be at high risk in different fields and ways, such as manufacturing in industries, direct loss in the economy, creating intense difficulties in ecology, and so on, if not taking proper steps to control the corrosion. Thus, corrosion studies of Al‐based materials have received significant consideration from scientists owing to their extensive industrial applications and financial implications [27–34]. Though the previous reports have been found on the corrosion characteristics of Al in different media such as halide [35, 36] and some weak acidic media such as hydrochloric acid, and sulfuric acid [37–39], the present works show the connection of the Al materials for use as BP in PEMFCs.…”

Section: Introductionmentioning

confidence: 72%

“…Thus, corrosion studies of Al‐based materials have received significant consideration from scientists owing to their extensive industrial applications and financial implications [27–34]. Though the previous reports have been found on the corrosion characteristics of Al in different media such as halide [35, 36] and some weak acidic media such as hydrochloric acid, and sulfuric acid [37–39], the present works show the connection of the Al materials for use as BP in PEMFCs.…”

Section: Introductionmentioning

confidence: 72%

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Corrosion behavior and surface structure analysis of pure aluminum immersed in fluoride‐sulfate solutions simulating polymer electrolyte membrane fuel cell‐produced water

Alam,

Jahan,

Suzuki

et al. 2024

Fuel Cells

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Bipolar plates are the key component in polymer electrolyte membrane fuel cells (PEMFCs), which ensure the low cost of the fuel cell stack and furnish some of the important applications such as distributing the reactant gases, conducting the electrons, and removing the waste heat in PEMFCs. Thus, metallic bipolar plates (BPs), such as aluminum (Al), have attracted immense consideration and afford better performance in different machine‐driven applications and mass manufacturing opportunities. In order to increase the corrosion resistance of Al BPs, several methods are used and conducted by scientists. The corrosion behavior and surface structure analysis of pure Al were studied through the immersion process in fluoride‐sulfate solutions, assuming its use as BPs in PEMFC‐produced water. The open cell voltage, interfacial contact resistance, and polarization tests and the fuel cell operations were performed to evaluate cell voltage, current density, corrosion resistance, and the effect of fluoride and sulfate ions on the BPs in PEMFC. The hydrophobicity character of the surface of Al BPs was observed by the measurement of the wettability test. The atomic force microscopy images were taken to study the surface roughness, which was correlated with the corrosion rates of Al BPs. In addition, the amount of corrosion was calculated after 24–120 h of immersion in fluoride‐sulfate solutions. The scanning electron microscopy, transmission electron microscopy, and energy‐dispersive X‐ray spectroscopy data were analyzed to investigate the surface structure, morphology, and elemental analyses. Thus, the results found in this study revealed that Al‐based materials can be suitable for BPs in PEMFCs. Furthermore, it is noticed that the amount of corrosion was influenced by the presence of even a very small amount of fluoride ions present in the PEMFC environment, while it was suppressed efficiently by sulfate ions.

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Section: Introductionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 72%

Corrosion behavior and surface structure analysis of pure aluminum immersed in fluoride‐sulfate solutions simulating polymer electrolyte membrane fuel cell‐produced water

Alam,

Jahan,

Suzuki

et al. 2024

Fuel Cells

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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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“…As a result of the significant applications of Al and its alloys in different sectors, it is really essential to continue the research on their corrosion properties and resistivity in other media. Many investigators have constantly dedicated their work to observing the corrosion behavior of Al and its alloys in various solutions 21‐33 . It has also been noticed that no related work has been found on Al and its alloys, such as 7003H and 7S10, in sulfuric acid media at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Surface morphology and corrosion behavior of pure aluminum and its alloys in aqueous sulfuric acid medium

Alam

Jahan

Suzuki

et al. 2023

Engineering Reports

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Aluminum and aluminum alloys are light materials with some of the preferences such as lightweight, high specific strength, good elasticity, and good workability that play an important role in today's modern and industrial world. The economic loss and environmental and safety problems are also the most concerning aspects of these materials. As a result, numerous studies are performed by the researchers to improve the overall environment throughout the materials world. That is why, in this study, the surface morphology and corrosion behavior of pure aluminum and its alloys, such as 7S10 and 7003H, were investigated in aqueous sulfuric acid medium through immersion process at different temperatures. Open‐circuit potential and potentiodynamic polarization techniques were used to evaluate the resistance to corrosion of pure aluminum and its alloys 7S10 and 7003H. The current density increased with increasing temperature in the case of the alloys, and pure aluminum showed the highest corrosion resistance properties. The surface roughness measurement was performed using atomic force microscope to find out the amount of roughness of the used materials before and after the immersion process. Surface roughness was higher on the alloys than in pure Al, which indicates that less corrosion was formed in pure Al than in the alloys. The surface morphology analysis was also carried out using scanning electron microscopic data. The results revealed that the alloy 7003H undergoes more corrosion than pure aluminum and 7S10 in sulfuric acid medium, which clearly indicates that pure aluminum has higher corrosion resistance than the alloys 7S10 and 7003H. The corrosion rate of the test materials decreased with increasing immersion time.

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

Cited by 3 publications

References 66 publications

Corrosion behavior and surface structure analysis of pure aluminum immersed in fluoride‐sulfate solutions simulating polymer electrolyte membrane fuel cell‐produced water

Corrosion behavior and surface structure analysis of pure aluminum immersed in fluoride‐sulfate solutions simulating polymer electrolyte membrane fuel cell‐produced water

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

Surface morphology and corrosion behavior of pure aluminum and its alloys in aqueous sulfuric acid medium

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