The Role of CO2 in the Oxidation-Protection of Mg-Containing Aluminum Alloys

Solem, Cathrine Kyung Won; Vullum, Per Erik; Ebadi, Mahsa; Tranell, Gabriella; Aune, Ragnhild E.

doi:10.1007/s11663-022-02524-3

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…However, in some cases, prolonged exposure to elevated temperatures during the process can result in undesirable oxidation of the alloy. One major challenge in the development of aluminum alloys is the occurrence of oxidation during the solution heat treatment 9 . In previous experiments in our laboratory, it was shown that the addition of magnesium to the alloy had been identified as a major cause of oxidation during the treatment, which can lead to undesirable changes in the properties of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Impact of Chemical Composition on the Oxidation Resistance of 2000 Series Aluminum Alloys using Extreme Vertices Design

Antunes,

Wainer,

Salvo

2024

Mat. Res.

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This research investigates optimizing the properties of 2024 aluminum alloy using the Extreme Vertices Design (EVD) method and linear regression. It examines the oxidation behavior of the alloy during solubilization heat treatment, specifically focusing on the effect of magnesium addition leading to a dark oxide layer. The study employs a comprehensive experimental design and regression models to estimate the specific oxidation rate constant (k). Analysis of results reveals variations in oxidation behavior among alloys and the influence of aluminum, copper, and magnesium concentrations on the oxidation rate. The regression analysis yields a comprehensive equation: k = -0.01Al -4.06Cu -15.71Mg + 4.52Al•Cu + 17.01Al•Mg + 418.5Cu:Mg -447.7Al•Cu•Mg, with statistically significant results (p < 0.05) for all terms. An increase in magnesium concentration was found to enhance the oxidation rate, implying a higher alloy susceptibility to oxidation. These findings underline the value of the EVD method and regression analysis in alloy property optimization, thus aiding in the design of aluminum alloys with improved oxidation resistance.

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Section: Introductionmentioning

confidence: 99%

Exploring the Impact of Chemical Composition on the Oxidation Resistance of 2000 Series Aluminum Alloys using Extreme Vertices Design

Antunes,

Wainer,

Salvo

2024

Mat. Res.

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Influence of Water Vapor on the Oxidation Behavior of Molten Aluminum Magnesium Alloys

Tichy,

Doppermann,

Pucher

et al. 2024

The Minerals, Metals &Amp; Materials Series

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Effect of (5%) CO2 on the Oxidation Rate During Cooling of Industrial Aluminum White Dross

Solem

Deledda

Zedel

et al. 2023

J. Sustain. Metall.

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Aluminum (Al) white dross is classified as hazardous waste and originates from the primary production of Al as a result of molten metal oxidation at an industrial scale. As the produced dross reduces the annual metallic Al production by up to 10%, finding a way to reduce the dross formation has always been of interest. Several laboratory studies have shown that exposing molten Al to small amounts of CO2 has an inhibiting effect on the oxidation rate of the metal. Still, few studies have described this effect at an industrial scale. The present work has therefore studied the impact of protective cooling of industrial white dross samples on the oxidation rate of the dross to shed some light on the issue. Samples were collected from the holding furnace in a casthouse during the production of two different charges of Al alloys with varying amounts of magnesium (Mg), i.e., Charge 1 (AlMg1.0Mn0.4) and Charge 2 (AlMg1.2Mn0.4). The samples were cooled in ambient air and under a lid with 5% CO2 mixed with 95% synthetic air in two parallels and later characterized by X-Ray Diffraction and Electron Probe MicroAnalysis combined with deterministic image analysis. Both methods confirm that all samples cooled under the protective atmosphere with 5% CO2 had a higher content of metallic Al (89.4 wt%) than those cooled in ambient air (86.0 wt%), indicating that small amounts of CO2 also inhibit the oxidation rate of dross at an industrial scale. Graphical Abstract

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The Role of CO2 in the Oxidation-Protection of Mg-Containing Aluminum Alloys

Cited by 5 publications

References 6 publications

Exploring the Impact of Chemical Composition on the Oxidation Resistance of 2000 Series Aluminum Alloys using Extreme Vertices Design

Exploring the Impact of Chemical Composition on the Oxidation Resistance of 2000 Series Aluminum Alloys using Extreme Vertices Design

Influence of Water Vapor on the Oxidation Behavior of Molten Aluminum Magnesium Alloys

Effect of (5%) CO2 on the Oxidation Rate During Cooling of Industrial Aluminum White Dross

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