Preparation, characterization and application of Al2O3 nanoparticles for the protection of boiler steel tubes from high temperature corrosion

Mohammed, Adnan A.; Khodair, Ziad T.; Khadom, Anees A.

doi:10.1016/j.ceramint.2020.07.172

Cited by 22 publications

(2 citation statements)

References 26 publications

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“…Al 2 O 3 and CuO can also be used to increase the efficiency of solar desalination systems to produce fresh water [21]. Nanoparticles of Al 2 O 3 can be successfully used as a protective coating for austenitic stainless steel to reduce its corrosion rate in high-temperature environments [22]. Also, Al 2 O 3 is widely used in the production of composite materials and catalysts, which have particular importance in the modern industrial sector.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nanostructured Alumina from Byproduct Aluminum Filings: Production and Characterization

Esaifan,

Al-Mobydeen,

Al-Masri

et al. 2023

Inorganics

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Aluminum oxide production from aluminum filings, which are a byproduct of several industrial machining processes and cannot be recycled to attain bulk aluminum (Al), is vital due to its wide use in scientific research and industry. The goal of this paper is to produce ultrafine and down-to-the-nanoscale alumina powder (Al2O3), starting from a waste Al filings. The microstructure and composition of the starting Al used were investigated using scanning electron microscopy (SEM), which was equipped with an attached energy dispersive spectrometer (EDS) unit. The results of this investigation confirmed that the starting Al was mainly Al–Mg alloy. Al2O3 was produced using two routes: The first involved the burning of aluminum hydroxide Al(OH)3 that was precipitated from aluminum chloride solution (AlCl3) resulting from dissolving the Al filings in 2M HCl. The second route involved direct precipitation as a reaction product of aluminum chloride with sodium carbonate solution. The Al2O3 produced using both routes, as well as the intermediate product Al(OH)3, were studied by SEM. The results demonstrate that the nanoscale range size was reached after milling of the produced Al2O3. Following thorough washing with distilled water, the EDS and the XRD techniques confirmed the formation of Al2O3, with no residual salt detected. The EDS results showed that the ratios of Al and O in the produced Al2O3 were about 96% of the ideal compound ratios. The XRD analysis also revealed the amorphous structure of the standard and the produced Al(OH)3, whereas the phases of the produced Al2O3 were either crystalline or amorphous. In our study, the Al2O3 percentage yield was about 77%, and this value obviously depends on the percentage of Al dross in the original Al filings. Overall, this research provides a novel contribution to the production of alumina powder in the nano-range starting from an aluminum filings byproduct, thereby reducing the dependence on known sources of aluminum.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Nanostructured Alumina from Byproduct Aluminum Filings: Production and Characterization

Esaifan,

Al-Mobydeen,

Al-Masri

et al. 2023

Inorganics

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“…Among the various materials which could be sprayed, plasma-sprayed alumina (Al 2 O 3 ) coating is widely used in corrosion and wear resistance applications due to its chemical stability, high hardness and elastic modulus, excellent wear resistance, etc. [3][4][5]. Nevertheless, the poor electrical conductivity of Al 2 O 3 coating restricts its potential usage in electronic components, electromagnetic shielding, heating elements, electro discharging machining, etc.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Graphene Retention and Electrical Conductivity of Plasma-Sprayed Alumina/Graphene Nanoplatelets Coating by Powder Heat Treatment

Xie

et al. 2021

Coatings

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Burning loss of graphene in the high-temperature plasma-spraying process is a critical issue, significantly limiting the remarkable performance improvement in graphene reinforced ceramic coatings. Here, we reported an effective approach to enhance the graphene retention, and thus improve the performance of plasma-sprayed alumina/graphene nanoplatelets (Al2O3/GNPs) coatings by heat treatment of agglomerated Al2O3/GNPs powders. The effect of powder heat treatment on the microstructure, GNPs retention, and electrical conductivity of Al2O3/GNPs coatings were systematically investigated. The results indicated that, with the increase in the powder heat treatment temperature, the plasma-sprayed Al2O3/GNPs coatings exhibited decreased porosity and improved adhesive strength. Thermogravimetric analysis and Raman spectra results indicated that increased GNPs retention from 12.9% to 28.4%, and further to 37.4%, as well as decreased structural defects, were obtained for the AG, AG850, and AG1280 coatings, respectively, which were fabricated by using AG powders without heat treatment, powders heat-treated at 850 °C, and powders heat-treated at 1280 °C. Moreover, the electrical conductivities of AG, AG850, and AG1280 coatings exhibited 3 orders, 4 orders, and 7 orders of magnitude higher than that of Al2O3 coating, respectively. Powder heat treatment is considered to increase the melting degree of agglomerated alumina particles, eventually leaving less thermal energy for GNPs to burn; thus, a high retention amount and structural integrity of GNPs and significantly enhanced electrical conductivity were achieved for the plasma-sprayed Al2O3/GNPs coatings.

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Aluminum Oxide Nanoparticles: Properties and Applications Overview

Congreve,

Quezada,

Kokkarachedu

2024

Nanotechnology in the Life Sciences

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Preparation, characterization and application of Al2O3 nanoparticles for the protection of boiler steel tubes from high temperature corrosion

Cited by 22 publications

References 26 publications

Synthesis of Nanostructured Alumina from Byproduct Aluminum Filings: Production and Characterization

Synthesis of Nanostructured Alumina from Byproduct Aluminum Filings: Production and Characterization

Enhancing Graphene Retention and Electrical Conductivity of Plasma-Sprayed Alumina/Graphene Nanoplatelets Coating by Powder Heat Treatment

Aluminum Oxide Nanoparticles: Properties and Applications Overview

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