The effect of bath aging on the microstructure of anodic oxide layers on AA1050

Schneider, Michael; Kremmer, K.

doi:10.1016/j.surfcoat.2014.03.008

Cited by 17 publications

(17 citation statements)

References 31 publications

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“…However, as we mentioned before, the use of low-purity technical alloys as starting materials for anodization can result in quite different morphologies. Recently, the effect of anodizing conditions on the structural features of AAO layers formed from low-purity Al was extensively studied [e.g., 41,79,80].…”

Section: Structural Features Of Aao Layersmentioning

confidence: 99%

Synthesis of Nanoporous Anodic Alumina by Anodic Oxidation of Low Purity Aluminum Substrates

et al. 2015

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The aim of this chapter is to present some recent findings on the fabrication of anodic aluminum oxide (AAO) layers by anodization of low purity aluminum substrates. The use of low purity, technical aluminum alloys, instead of high purity substrates, can significantly reduce the cost of AAO fabrication, however, this can also affect the structure and properties of as produced alumina layers. Here, we focused on the comparison of oxide layer growth on substrates with different Al contents, as well as on the new procedures used for the synthesis of well-ordered nanoporous oxides from technical aluminum alloys. Some applications of the formed nanoporous AAO layers are presented. IntroductionDuring the recent years nanomaterials have received significant attention due to many unique chemical and physical properties that make them promising materials for various modern applications. As a result, nanotechnology is now one of the most popular sciences which have opened a lot of new perspectives in almost all scientific disciplines [1]. Up to now, the main problem that limits the practical application of nanomaterials is a relatively high cost of nanofabrication [2]. That is why considerable research efforts focus on the design and control of novel nanostructures via innovative synthetic strategies. A big attention has been paid to development a simple and inexpensive method of nanofabrication that can be used not only in a laboratory scale but also could have some potential for a commercial-scale implementation. Among numerous strategies reported in the literature, one of the most popular method for fabricating nanostructured oxide layers on the metal surface is controlled anodic oxidation (anodization) of metals under

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Section: Structural Features Of Aao Layersmentioning

confidence: 99%

Synthesis of Nanoporous Anodic Alumina by Anodic Oxidation of Low Purity Aluminum Substrates

et al. 2015

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“…This well‐known fact is surprisingly scarcely discussed in the literature . On the one hand side, the impact of bath aging on the quality of anodic oxide layers depends on the kind of anodizing process and the anodizing parameters, on the other hand side the influence of the kind of alloy must not be underestimated. In a first approach, the change of the oxide formation on a low alloyed aluminum material AA‐6060 with ongoing bath aging and the consequential effects on corrosion relevant electrochemical behaviors are in focus of the current work.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of anodized AA‐6060 depending on the anodizing bath aging

Schneider

Kremmer

2019

Materials & Corrosion

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The present work is concerned with the corrosion behavior of anodized AA‐6060 in chloride containing solutions. The anodic layers were produced with identical anodizing parameters but in an anodizing bath at different stages of bath aging or the time of use, respectively. The bath aging was monitored by the conductivity and was related to the consumed charge. The oxide layers were characterized by scanning electron microscopy (SEM)/electron dispersive x‐ray spectroscopy (EDX) and X‐ray fluorescence analysis. The corrosion behavior was characterized by a combination of electrochemical measurements (linear sweep voltammetry and electrochemical impedance spectroscopy) and corrosion tests (droplet and salt spray tests). It is shown in this paper that the kinetics of oxide formation, as well as the oxide composition, changes with ongoing bath aging. The corrosion protection of the anodic layers strictly depends on the time of use of the anodizing bath and decreases continuously with ongoing bath aging.

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“…In summary, there are a lack of systematic studies about the interplay between bath aging and oxide formation, and properties. In an earlier work, the authors investigated the impact of bath aging of a modified phosphorous acid anodizing process ( T = 45°C; V = 50 V; c = 20 wt% H 3 PO 4 ) . They found a strict relationship between bath aging and oxide growth, thickness, morphology, and hardness of the produced oxide films .…”

Section: Introductionmentioning

confidence: 99%

“…In an earlier work, the authors investigated the impact of bath aging of a modified phosphorous acid anodizing process ( T = 45°C; V = 50 V; c = 20 wt% H 3 PO 4 ) . They found a strict relationship between bath aging and oxide growth, thickness, morphology, and hardness of the produced oxide films . To illustrate the process of bath aging, the electrochemical reactions of anodizing are briefly commemorated.…”

Section: Introductionmentioning

confidence: 99%

Anodizing—Interplay between bath aging and oxide formation and properties

Schneider

Kremmer

Gierth

2018

Surface & Interface Analysis

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The present study investigates the interplay between ongoing bath aging during the anodizing process and the formation and properties of the anodic formed oxide layers on AA 1050 in sulfuric acid. The change in the bath over the time of use is studied by controlling the conductivity of the bath. The pH value and the concentration of Al3+ ions in the bath are simultaneously measured. The kinetic of the oxide formation depending on the bath aging is electrochemically investigated by repetitive potential controlled anodizing of reference samples. Supplementary material diagnostics by SEM and infrared reflection–absorption spectroscopy show a significant decrease of the oxide film thickness as well as the molecular composition with ongoing bath aging.

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The effect of bath aging on the microstructure of anodic oxide layers on AA1050

Cited by 17 publications

References 31 publications

Synthesis of Nanoporous Anodic Alumina by Anodic Oxidation of Low Purity Aluminum Substrates

Synthesis of Nanoporous Anodic Alumina by Anodic Oxidation of Low Purity Aluminum Substrates

Corrosion behavior of anodized AA‐6060 depending on the anodizing bath aging

Anodizing—Interplay between bath aging and oxide formation and properties

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