Corrosion Resistance of Porous Alumina Ceramics in Acetic Acid Solution

Tuurna, Satu; Nikkilä, A.-P.; Mäntylä, T.

doi:10.4028/www.scientific.net/kem.206-213.1923

Cited by 4 publications

(7 citation statements)

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“…For samples reported as shown in Figure 9C,D, SiO 2 was added directly or indirectly, then crystallite, mullite, or silicate glassy formed as bonding phase in resulting porous ceramics. As reported by Tuurna et al., 15 SiO 2 and small amounts of alkalis dissolved during the test whereas only trace Al 2 O 3 dissolved, which means that dissolution of SiO 2 and alkaline elements to acid is the main reason for the acidic corrosion. In this work, Y 2 O 3 was used as a sintering additive, and no SiO 2 was introduced.…”

Section: Resultssupporting

confidence: 61%

“…Thus, much research has been carried out to characterize the corrosion resistance of porous alumina to acid and alkali. Corrosion resistance test of porous alumina to an acetic acid solution with pH = 4 at 110 • C for as long as 21 days was investigated by Tuurna et al 15 It indicated that minimal mass loss could be observed, while some SiO 2 and small amounts of alkalis dissolved during the test, whereas only trace Al 2 O 3 dissolved. Mass loss and strength degradation of porous alumina corroded by 20 wt.% sulfuric acid and 10 wt.% sodium hydroxide at 105-107 • C were characterized by Dong et al, 16 which demonstrated that porous alumina exhibited better corrosion resistance to sulfuric acid than to sodium hydroxide.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Permeability and corrosion resistance of the porous alumina doped by Y₂O₃ with monodispersed PMMA as pore former

Cao

Zhao

et al. 2022

Int J Applied Ceramic Tech

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Porous alumina, with monodispersed PMMA as pore former and Y2O3 as sintering additive, was prepared via a gel casting route with Isobam as a gelling agent. The effects of PMMA addition on its properties, including apparent porosity, bulk density, strength, permeability, and corrosion resistance to acid/alkali, were investigated. With PMMA addition increased, the apparent porosity and permeability were increased obviously, while strength and corrosion resistance to acid/alkali were deteriorated due to increased porosity. Higher firing temperature resulted in lower porosity, higher strength, lower permeability, and better corrosion resistance to acid/alkali. Coarser raw powders resulted in lower strength and higher permeability due to the coarser structure and larger pores of the fabricated samples. Because Y2O3 was used as a sintering additive, and no silica was introduced, the resulting samples possess better corrosion resistance to acid and alkali, especially much better corrosion resistance to alkali, than those reported with silica introduced.

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Section: Resultssupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Permeability and corrosion resistance of the porous alumina doped by Y₂O₃ with monodispersed PMMA as pore former

Cao

Zhao

et al. 2022

Int J Applied Ceramic Tech

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“…The shares of additives in the vitreous phase tend to be higher than in the crystal phase, as was also described by ref. [46]. Due to the strongly fluctuating values of the small shares, no conclusion can be drawn regarding whether the composition of the vitreous phase changes.…”

Section: Aluminum Oxide (90%)mentioning

confidence: 99%

Screening of Filler Material for a Packed‐Bed Thermocline Energy Storage Test Facility with Lead–Bismuth Eutectic as the Heat Transfer Fluid

Müller‐Trefzer,

Heinzel,

Hesse

et al. 2023

Energy Tech

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Suitable solid filler materials are investigated for use in a packed‐bed heat storage test facility for high temperatures with lead–bismuth eutectic (LBE) as the heat transfer fluid. Accordingly, first, the thermophysical properties of six different candidate materials, two glasses and four ceramics, are determined. The density and heat capacity are measured experimentally and the thermal conductivity is discussed based on literature data. Subsequently, a static corrosion test is performed at 500 °C for 1 and 4 weeks in LBE under reducing conditions. The glasses are found to be unsuitable due to corrosion attack. Among the ceramics, zirconium silicate and zirconium oxide are identified to be highly resistant to corrosion. Zirconium silicate is subsequently also successfully tested as a storage material in a laboratory experiment under cyclic conditions.

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“…Generally, ceramics are known for their good corrosion resistance 15 . However, they are susceptible to corrosion in presence of corrosive environment.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Spark Plasma Sintered Alumina and Al2O3-SiC-CNT Hybrid Nanocomposite

et al. 2020

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The use of ceramic-based materials has become more common in many applications because of their unique characteristics and properties. Design of alumina hybrid nanocomposites achieved by incorporating two nanoreinforcements, with different morphologies and/or attributes, such as CNTs and SiC, is a new approach that has been adopted to enhance the properties of alumina. The microstructural, mechanical, electrical, and thermal properties of Al 2 O 3-SiC-CNT hybrid nanocomposites were investigated and reported in the literature. However, the corrosion behavior was not considered. The present paper reports the electrochemical corrosion behavior of pure Al 2 O 3 and Al 2 O 3-5SiC-2CNT hybrid nanocomposite in acidic (2.34M HCl) and alkaline (6.5M NaOH) environments at room temperature. Ball milling (BM) and spark plasma sintering (SPS) were used for preparation of samples. The microstructure of sintered samples was investigated through field emission scanning electron microscopy (FE-SEM). Potentiodynamic polarization (PDP) technique was used to investigate the corrosion behavior. The corrosion rate of the Al 2 O 3-5SiC-2CNT nanocomposite increased 96 and 178% in HCl and NaOH solution, respectively, compared to alumina. Possible corrosion mechanisms and factors effecting corrosion were discussed.

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Corrosion Resistance of Porous Alumina Ceramics in Acetic Acid Solution

Cited by 4 publications

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Permeability and corrosion resistance of the porous alumina doped by Y₂O₃ with monodispersed PMMA as pore former

Permeability and corrosion resistance of the porous alumina doped by Y₂O₃ with monodispersed PMMA as pore former

Screening of Filler Material for a Packed‐Bed Thermocline Energy Storage Test Facility with Lead–Bismuth Eutectic as the Heat Transfer Fluid

Corrosion Behavior of Spark Plasma Sintered Alumina and Al2O3-SiC-CNT Hybrid Nanocomposite

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Corrosion Resistance of Porous Alumina Ceramics in Acetic Acid Solution

Cited by 4 publications

References 0 publications

Permeability and corrosion resistance of the porous alumina doped by Y2O3 with monodispersed PMMA as pore former

Permeability and corrosion resistance of the porous alumina doped by Y2O3 with monodispersed PMMA as pore former

Screening of Filler Material for a Packed‐Bed Thermocline Energy Storage Test Facility with Lead–Bismuth Eutectic as the Heat Transfer Fluid

Corrosion Behavior of Spark Plasma Sintered Alumina and Al2O3-SiC-CNT Hybrid Nanocomposite

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Permeability and corrosion resistance of the porous alumina doped by Y₂O₃ with monodispersed PMMA as pore former

Permeability and corrosion resistance of the porous alumina doped by Y₂O₃ with monodispersed PMMA as pore former