Surface finish effect on the anodizing behaviour of Al-Si components obtained by sub-liquidus casting process

Menargues, Sergi; Picas, Josep A.; Martín, Enric; Baile, M.T.; Campillo, M.; Forn, Antonio

doi:10.1007/s12289-010-0883-0

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…Upon increasing the content of defects in the oxide layer, the galvanic corrosion beneath the oxide surface was enhanced. Similar results were found by Chaukea et al [ 41 ] and Menargues et al [ 42 ]…”

Section: Influence Of the Chemical Composition And Microstructure Of ...supporting

confidence: 92%

Anodizing Al–Si Foundry Alloys: A Critical Review

Scampone

Timelli

2022

Adv Eng Mater

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Compared with pure aluminum and wrought aluminum alloys, Al foundry alloys are more difficult to be anodized. The high content of alloying elements prevents the uniform growth of the Al oxide layer and enhances the embedding of defects in the anodic film. The microstructure of the substrate and the anodizing parameters play a key role in the final quality of the oxide layer. Variations in the chemical composition, casting process, and pre-and post-anodizing treatments can significantly affect the anodizing response. This work aims to critically review the main factors influencing the growth and morphology of the anodic layer in Al-Si foundry alloys. In particular, the effects on the oxide thickness, surface mechanical properties, and corrosion resistance are discussed in detail.

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Section: Influence Of the Chemical Composition And Microstructure Of ...supporting

confidence: 92%

Anodizing Al–Si Foundry Alloys: A Critical Review

Scampone

Timelli

2022

Adv Eng Mater

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“…With an increase in the defect content within the oxide layer, galvanic corrosion beneath the oxide surface was observed to intensify. In their study, Chaukea et al [48] and Menargues et al [49] reported similar findings.…”

Section: Silicon Particlessupporting

confidence: 56%

Critical Challenges in the Anodizing Process of Aluminium -Silicon Cast Alloys—A Review

Razzouk,

Koncz-Horvath,

Török

2024

Preprint

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The microstructure of the substrate plays a crucial role in the anodizing process. Anodizing cast aluminum alloys is quite challenging due to the higher levels of alloying elements present compared to pure aluminum. Elements such as silicon, iron, and copper significantly impact the growth and quality of the anodic layer. Additionally, anodizing parameters such as electrolyte composition, current density, and temperature are critical in determining the morphology and thickness of the anodic film. The casting process, surface condition, and post-treatment also affect the properties of the anodic layer. Optimizing these parameters is essential to achieve a durable and high-quality anodic layer. This work aims to provide a comprehensive understanding of the various factors affecting the anodizing of cast aluminum alloys and the properties of the anodic layer, including its thickness, corrosion resistance, and wear resistance.

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“…Anodising, which is an electrochemical process, is one of the most extensively used methods to improve the surface performance of aluminium alloys such as corrosion and wear resistance and aesthetic property. Previous studies have revealed that the anodised layer and its performance is strongly influenced by anodising process [2,3], surface condition [4,5], alloying elements [4,6] and microstructure [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Study of Anodising Behaviour of Al-Si Components Produced by Rheocasting

Zhu

Seifeddine

Jarfors

et al. 2019

SSP

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This paper aims to investigate the anodising behaviour of Al-Si components produced by rheocasting, to understand the effect of the surface liquid segregation (SLS) on the anodising response. The material investigated was EN AC 42000 Al-alloy with an addition of 150 ppm Sr. The component was rheocast and conventionally liquid cast for benchmarking. The RheoMetalTM process was used to prepare slurry and subsequently cast using a vertical pressure die casting machine. Prior to anodising, mechanical grinding was used as pre-treatment method for selected samples as comparison with components in the as-cast state. Anodising was performed on the components using a constant controlled voltage at 25 V, in 1 M H2SO4, at room temperature. The duration of anodising was varied from 30 mins to 120 mins to examine the relationship between oxide layer thickness and the anodising time. The oxide layer was investigated and characterised. The results demonstrated that the presence of the SLS layer, which was enriched with alloying elements, had a significant influence on the anodising behaviour of the cast component. The oxide layer thickness of the components produced by rheocasting and fully liquid casting was measured and compared. The relations between the oxide layer thickness and anodising time, as well as the casting methods are presented and discussed in this paper.

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Surface finish effect on the anodizing behaviour of Al-Si components obtained by sub-liquidus casting process

Cited by 8 publications

References 6 publications

Anodizing Al–Si Foundry Alloys: A Critical Review

Anodizing Al–Si Foundry Alloys: A Critical Review

Critical Challenges in the Anodizing Process of Aluminium -Silicon Cast Alloys—A Review

A Study of Anodising Behaviour of Al-Si Components Produced by Rheocasting

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