Inhibition of the reaction between aluminium dust and water based on the HIM

Wang, Yantong; Xu, Kaili; Li, Li

doi:10.1039/c7ra04787h

Cited by 20 publications

(14 citation statements)

References 33 publications

(50 reference statements)

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“…The heat treatment steps of solubilization influence the reactivity of the Al 2 O 3 layer with atmospheric H 2 O [45]. According to previous work [26,38,46], the chemical reactions that explain formation of hydrogen gas from atmospheric H 2 O are those shown in Equations 1, 2 and 3, which concern the mechanism of formation of subsurface hydrogen blisters.…”

Section: Diffusivitymentioning

confidence: 98%

Formation of hydrogen blisters during the solution treatment for aluminum alloys

Diehl¹,

Schneider²,

Clarke³

2021

Tecnol. Metal. Mater. Min.

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The solution treatment of aluminum alloys can be restricted by the presence of porosity defects caused by the moisture present in the process or by the hydrated front on the material surface. Hydrogen blisters cause deleterious effects on mechanical properties and surface finish. However, the formation of bubbles in solid aluminum is not caused only by the known reaction 2Al+3H 2 O=3H 2 +Al 2 O 3 , as it does not explain the interaction of the aluminum oxide layer with the formation mechanisms. In addition, the literature approaches show that there is more than one mechanism for the formation of these defects, but no work has made an association between them. Thus, the objective of this work is to carry out extensive research on the state of the art of hydrogen blister formation in aluminum alloys during the solubilization heat treatment. Contemplating different proposed mechanisms of bubble formation on the surface and structure, the analysis of this association of approaches indicated that the mechanisms depend on both permeability, where the hydrated oxide front creates passage for the formation of blister in the sublayer, as well as diffusion and hydrogen solubility in the microstructure.

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Section: Diffusivitymentioning

confidence: 98%

Formation of hydrogen blisters during the solution treatment for aluminum alloys

Diehl¹,

Schneider²,

Clarke³

2021

Tecnol. Metal. Mater. Min.

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show abstract

“…According to the work by Wang Y. et al, [14][15][16][17] the initial temperature and pressure for each experiment were set to 50 C and 100 kPa, respectively. In addition, the reaction between aluminum particles and water can produce only hydrogen; thus, the change in the mole of the generated hydrogen can be characterized by the change of the pressure within the reactor.…”

Section: Hydrogen Inhibition Experimentsmentioning

confidence: 99%

“…At this time, no L-phenylalanine protective lm existed on the aluminum particle surface. According to the work by Wang Y. et al [14][15][16] and Xu K. et al, 17 aer all the Al 2 O 3 available on the surface has reacted with water and formed Al(OH) 3 , the aluminum core can react with Al(OH) 3 and generate hydrogen. Fig.…”

Section: Sem-edsmentioning

confidence: 99%

“…The inhibitors proposed by Wang Y. [14][15][16] and Xu K. 17 to inhibit the reaction between aluminum particles and water are precipitating inhibitors. Most of the adsorbent inhibitors are organic materials, which have polar genes and can be adsorbed by metal surface charges.…”

Section: Physicochemical Mechanismsmentioning

confidence: 99%

“…Wang Y. proposed the use of K 2 Cr 2 O 7 , Na 2 Cr 2 O 7 $2H 2 O, Cr(NO 3 ) 3 $9H 2 O, and CrK(SO 4 ) 2 -$12H 2 O, and Xu K. proposed the use of CeCl 3 to inhibit the reactions between aluminum and water in wet dust removal systems. [14][15][16][17] These inhibitors can effectively constrain the reaction between aluminum dust and water and intrinsically prevent the hydrogen explosions in wet dust removal systems. However, chromate is toxic, and the long-term exposure to chromate can cause cancer.…”

Section: Introductionmentioning

confidence: 99%

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Study of hydrogen explosion control measures by using l-phenylalanine for aluminum wet dust removal systems

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Controlling the Surface of Aluminum Nanocrystals: From Aluminum Oxide to Aluminum Fluoride

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et al. 2023

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Aluminum nanocrystals are emerging as a promising alternative to silver and gold for various applications ranging from plasmonic functionalities to photocatalysis and as energetic materials. Such nanocrystals often exhibit an inherent surface oxidation layer, as aluminum is highly reactive. Its controlled removal is challenging but required, as it can hinder the properties of the encaged metal. Herein, two wet‐chemical colloidal approaches toward the surface coating of Al nanocrystals, which afford control over the surface chemistry of the nanocrystals and the oxide thickness, are presented. The first approach utilizes oleic acid as a surface ligand by its addition toward the end of the Al nanocrystals synthesis, and the second approach is the post‐synthesis treatment of Al nanocrystals with NOBF4, in a “wet” colloidal‐based approach, which is found to etch and fluorinate the surface oxides. As surface chemistry is an important handle for controlling materials’ properties, this research paves a path for manipulating Al nanocrystals while promoting their utilization in diverse applications.

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Inhibition of the reaction between aluminium dust and water based on the HIM

Abstract: The reaction between aluminum dust and water is inhibited using the Hydrogen Inhibition Method (HIM).

Cited by 20 publications

References 33 publications

Formation of hydrogen blisters during the solution treatment for aluminum alloys

Formation of hydrogen blisters during the solution treatment for aluminum alloys

Study of hydrogen explosion control measures by using l-phenylalanine for aluminum wet dust removal systems

Controlling the Surface of Aluminum Nanocrystals: From Aluminum Oxide to Aluminum Fluoride

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