Formation Efficiency of Porous Oxide Films in Aluminum Anodizing

Gordeeva, Elena O.; Roslyakov, Ilya V.; Sadykov, A. I.; Suchkova, Taisiya A.; Петухов, Д. И.; Шаталова, Т. Б.; Napolskii, K. S.

doi:10.1134/s1023193518130165

Cited by 14 publications

(12 citation statements)

References 35 publications

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“…A similar dependence of volumetric growth factor Kg on anodizing voltage Ea in several other conditions was found in ref. [58]. A decrease of Kg in concentrated solutions due to chemical dissolution of the PAF surface at low temperature is unlikely, which is confirmed by the SEM images presented in Figure 6.…”

Section: Resultssupporting

confidence: 60%

“…A similar dependence of volumetric growth factor K g on anodizing voltage E a in several other conditions was found in ref. [58].…”

Section: Resultsmentioning

confidence: 99%

“…Figure 4 a shows the volumetric growth factor dependence on the anodic voltage, which has similar trend as the dependence

presented in Figure 3 c. A similar dependence of volumetric growth factor K g on anodizing voltage E a in several other conditions was found in ref. [ 58 ].…”

Section: Resultsmentioning

confidence: 99%

“…In this regard, over the years Dr. Viktor Surganov and coworkers have undertaken systematic comprehensive investigation of the PAF formation, dissolution, and growth in solutions of oxalic [ 54 , 55 ], orthophosphoric [ 56 , 57 ], malonic [ 44 , 46 ], and sulfosalicylic [ 45 ] acids, under comparable conditions. The experimental techniques and the aluminum quality in the other author investigations for sulfuric acid (SA) anodizing of aluminum [ 35 , 40 , 41 , 58 ] are quite different, which makes it difficult to compare the results. For example, in ref.…”

Section: Introductionmentioning

confidence: 99%

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Porous Alumina Films Fabricated by Reduced Temperature Sulfuric Acid Anodizing: Morphology, Composition and Volumetric Growth

et al. 2021

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The volumetric growth, composition, and morphology of porous alumina films fabricated by reduced temperature 280 K galvanostatic anodizing of aluminum foil in 0.4, 1.0, and 2.0 M aqueous sulfuric acid with 0.5–10 mA·cm−2 current densities were investigated. It appeared that an increase in the solution concentration from 0.4 to 2 M has no significant effect on the anodizing rate, but leads to an increase in the porous alumina film growth. The volumetric growth coefficient increases from 1.26 to 1.67 with increasing current density from 0.5 to 10 mA·cm−2 and decreases with increasing solution concentration from 0.4 to 2.0 M. In addition, in the anodized samples, metallic aluminum phases are identified, and a tendency towards a decrease in the aluminum content with an increase in solution concentration is observed. Anodizing at 0.5 mA·cm−2 in 2.0 M sulfuric acid leads to formation of a non-typical nanostructured porous alumina film, consisting of ordered hemispheres containing radially diverging pores.

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Section: Resultssupporting

confidence: 60%

“…A similar dependence of volumetric growth factor K g on anodizing voltage E a in several other conditions was found in ref. [58].…”

Section: Resultsmentioning

confidence: 99%

“…Figure 4 a shows the volumetric growth factor dependence on the anodic voltage, which has similar trend as the dependence

presented in Figure 3 c. A similar dependence of volumetric growth factor K g on anodizing voltage E a in several other conditions was found in ref. [ 58 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Porous Alumina Films Fabricated by Reduced Temperature Sulfuric Acid Anodizing: Morphology, Composition and Volumetric Growth

et al. 2021

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“…Prevalence of the self-ordering depends on the applied voltage and is shown in Figure 6 . The applied potential is linked with the formation efficiency, volume expansion, and content of the electrolyte impurities for 20–130 V anodization in 0.3 M H 2 C 2 O 4 and 19–60 V 0.3 M H 2 SO 4 [ 112 ] . The formation efficiency and the volume expansion were found proportional to the potential increase, while the degree of ion embedding was the highest for moderate values exceeding ones achieved with either low or high potential.…”

Section: Nanoporous Anodic Alumina (Naa): Definition and Formationmentioning

confidence: 99%

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

2021

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The development of aluminum anodization technology features many stages. With the story stretching for almost a century, rather straightforward—from current perspective—technology, raised into an iconic nanofabrication technique. The intrinsic properties of alumina porous structures constitute the vast utility in distinct fields. Nanoporous anodic alumina can be a starting point for: Templates, photonic structures, membranes, drug delivery platforms or nanoparticles, and more. Current state of the art would not be possible without decades of consecutive findings, during which, step by step, the technique was more understood. This review aims at providing an update regarding recent discoveries—improvements in the fabrication technology, a deeper understanding of the process, and a practical application of the material—providing a narrative supported with a proper background.

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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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Formation Efficiency of Porous Oxide Films in Aluminum Anodizing

Cited by 14 publications

References 35 publications

Porous Alumina Films Fabricated by Reduced Temperature Sulfuric Acid Anodizing: Morphology, Composition and Volumetric Growth

Porous Alumina Films Fabricated by Reduced Temperature Sulfuric Acid Anodizing: Morphology, Composition and Volumetric Growth

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

Anodizing Al–Si Foundry Alloys: A Critical Review

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