Electrochemical kinetic study on the growth of porous anodic oxide films on aluminium

Patermarakis, G.; Moussoutzanis, K.

doi:10.1016/0013-4686(94)00347-4

Cited by 68 publications

(52 citation statements)

References 32 publications

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“…Thus, an estimate of the true surface area at the pore base per unit geometric area can be obtained from the value of the parameter nD 2 . Patermarakis et al [2,3] have analyzed the variation of this parameter as a function of the bath temperature and the anodization current density. Their analysis indicates that in the range of anodization voltages under consideration in this study (12-16 V), the current densities (10-20 mA cm )2 ) only marginally affect these structural features, i.e., only about 20% variation in the true surface area.…”

Section: Effect Of the Anodization Voltagementioning

confidence: 99%

“…At the base of the porous oxide structure is a compact, highly resistive barrier oxide layer that separates the aluminum substrate from the anodizing electrolyte. The structural features of the porous anodic oxide coatings have been the subject of detailed investigations -from experimental studies [1][2][3][4] to analytical and numerical modeling [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of the electrolytic coloring process on anodized aluminum

2006

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The kinetics of tin electrodeposition during the electrolytic coloring of porous anodic oxide films on aluminum is studied as a function of the oxide properties, e.g., the thickness of the porous oxide layer, and the surface resistance offered by the barrier oxide layer. While the thickness of the porous oxide layer is controlled by the anodization time, the surface resistance is controlled by the anodization voltage, and the anodization bath temperature. Steady-state polarization measurements are employed to characterize the dependence of the coloring kinetics on the oxide properties. Measurements indicate that the kinetics of the electrolytic coloring process can be accelerated by: (i) reducing the surface resistance of the oxide film (primarily offered by the barrier oxide layer) by growing the oxide at a lower anodization voltage, and/or a higher bath temperature, or (ii) growing a thinner porous oxide layer by decreasing the anodization time. The electrochemical measurements are supported by gravimetric analysis of electrolytically colored alumina samples (using calibrated wavelength-dispersive X-ray fluorescence spectroscopy), and by optical spectrophotometry.

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Section: Effect Of the Anodization Voltagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetics of the electrolytic coloring process on anodized aluminum

2006

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“…A model for charge transport across the barrier layer was also proposed by Patermarakis et al [376][377][378]. The prolonged anodization proved that the rate-controlling step of the steady-state growth of porous alumina is charge transport across the barrier layer, with the native oxide being produced mainly in the region adjacent to the metal/oxide interface (Figure 1.16).…”

Section: Growth Models Proposed By Patermarakis and Colleaguesmentioning

confidence: 99%

“…Patermarakis et al [271][272][273][364][365][366][367][368][369][370][371][372][373][374][375][376][377][378] described, in several publications, a compact theoretical model of porous alumina growth in various electrolytes. Different approaches have been employed to obtain information about the kinetics and mechanism of the oxide growth mainly in sulfate solutions.…”

Section: Growth Models Proposed By Patermarakis and Colleaguesmentioning

confidence: 99%

Highly Ordered Anodic Porous Alumina Formation by Self‐Organized Anodizing

Sulka

2008

Nanostructured Materials in Electrochemistry

236

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“…29 They suggested oxygen evolution plays a primary role on the formation of ribs around the ATNTs. 29 Since 2008, based on the characteristics of ionic conductivity and electronic conductivity, 30,31 the oxide breakdown theory 32,33 and the 'plastic flow' model, [16][17][18] we have also introduced a growth model of oxygen bubble mould (OBM), which emphasizes that the columnar pore or the nanotubes result from the oxide flow around the oxygen bubble remained within the pore bottom. [34][35][36] The model and conclusion of the papers above were reinforced by our subsequent works.…”

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confidence: 99%

Formation Mechanism of Gaps and Ribs Around Anodic TiO₂Nanotubes and Method to Avoid Formation of Ribs

Chong

Gao

et al. 2015

J. Electrochem. Soc.

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Anodic TiO 2 nanotubes (ATNTs) have been studied extensively for many years. However, their mysterious formation mechanism still remains unclear. The formation of gaps and ribs around the nanotubes has not been elucidated. Here, various surface and cross-section morphologies of ATNTs obtained under different anodizing conditions and their evolution process have been investigated in detail. Based on many experimental facts, new explanations for the gaps and ribs are presented. An entire surface layer covered on the nanotubes plays a primary role on the formation of gaps and ribs. The gaps result from the radial distribution of the electric field at the pore bottom. No newly-formed oxide will exist along the gap direction, because the electric filed along the gap is the minimum. The ribs result from the electrolyte entering into the wider gaps among the ATNTs due to the rupture of the entire surface layer. The rings or ribs on the outer wall of ATNTs are formed at the electrolyte/Ti interface due to the discontinuous existence of a small amount of electrolyte within the gap base. The present viewpoint was demonstrated by an original micro-dam, which can block the electrolyte entering into the gaps and avoid the formation of ribs.

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Electrochemical kinetic study on the growth of porous anodic oxide films on aluminium

Cited by 68 publications

References 32 publications

Kinetics of the electrolytic coloring process on anodized aluminum

Kinetics of the electrolytic coloring process on anodized aluminum

Highly Ordered Anodic Porous Alumina Formation by Self‐Organized Anodizing

Formation Mechanism of Gaps and Ribs Around Anodic TiO₂Nanotubes and Method to Avoid Formation of Ribs

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Electrochemical kinetic study on the growth of porous anodic oxide films on aluminium

Cited by 68 publications

References 32 publications

Kinetics of the electrolytic coloring process on anodized aluminum

Kinetics of the electrolytic coloring process on anodized aluminum

Highly Ordered Anodic Porous Alumina Formation by Self‐Organized Anodizing

Formation Mechanism of Gaps and Ribs Around Anodic TiO2Nanotubes and Method to Avoid Formation of Ribs

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Formation Mechanism of Gaps and Ribs Around Anodic TiO₂Nanotubes and Method to Avoid Formation of Ribs