A Novel Process to Produce Nano Porous Aluminum Oxide Using Alkaline Sodium Phosphate Electrolyte

Araoyinbo, Alaba O.; Fauz, M.N. Ahmad; Sreekantan, Srimala; Aziz, Abdul

doi:10.3923/ajmskr.2010.63.68

Cited by 5 publications

(5 citation statements)

References 17 publications

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“…In addition, the quality of anodized aluminum is also affected by the potential difference provided. A significant potential difference affects the width and thickness of the aluminum oxide pores formed, leading to variations in the resulting material's properties [31]. Aluminum anodic coatings are widely used in aviation technology for various purposes, such as corrosion resistance, wear resistance, and electrical insulation.…”

Section: Discussion Of the Experiments Corrosion Rate Using Boric Sul...mentioning

confidence: 99%

Sealing effect on corrosion resistance of boric sulfuric acid anodizing on AA2024

Zuchry

Renreng

Arsyad

et al. 2023

EEJET

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Aluminum is widely used due to its excellent properties, lightweight and thermal conductivity. However, when used in aircraft applications, it can cause corrosion and sticking, compromising safety. To address this issue, anodizing is used to improve aluminum's corrosion resistance and adhesion. In this study, the AA2024 material was anodized using the boron-sulfuric acid anodization (BSAA) process, followed by a sealing process using acetic acid. This sealing process forms an oxide layer on the aluminum's surface, which reduces the corrosion rate. The study investigated the effects of anodization voltage and time on the results of BSAA anodization through quantitative and qualitative measurements, including corrosion resistance, potentiodynamic polarization, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The results showed that samples anodized with a gasket could reduce the corrosion rate by up to 85 % compared to those without a gasket and substrate. The most significant reduction in corrosion rates occurred at an anodization voltage of 10 V and an anodization time of 15 min. The potentiodynamic test results indicated that the Tafel plot during sealing lies in the cathodic region where the corrosion current density decreases with increasing voltage. SEM observations revealed that the anodizing process could provide an oxide layer on the samples' surface, while the sealing process creates a smooth surface. EDS analysis showed that an oxide compound was formed in an oxide bond state after the sample surface was subjected to the sealing treatment. Overall, the study demonstrates the effectiveness of BSAA anodization in improving corrosion resistance and highlights the importance of considering the anodization parameters

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Section: Discussion Of the Experiments Corrosion Rate Using Boric Sul...mentioning

confidence: 99%

Sealing effect on corrosion resistance of boric sulfuric acid anodizing on AA2024

Zuchry

Renreng

Arsyad

et al. 2023

EEJET

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“…The decrease in hydration and anion incorporation in the electrolyte cause lower dissolution rate of oxide layer and resulted to the decreasing of pore diameter [11]. Besides, voltage increment resulted in significant increase in the current density which increases the rate of chemical dissolution of the oxide layer formed during the anodising process while the cross sectional area of the material remains constant [12]. Thus, the increasing of anodising voltage will result in increasing pore diameter of the AAO membrane.…”

Section: Morphologymentioning

confidence: 99%

A Study on the Effect of Modified Electrolyte to the Formation of AAO Membrane in Anodising Process

Wahab

Misbah

Jamil

et al. 2013

AMR

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The formation of anodic aluminium oxide (AAO) membrane in anodising process has been studied. The anodising process was done in two different type of electrolyte which are single phosphoric acid and a mixture of phosphoric acid and acetic acid. This study was done to determine the influence of this mixed electrolyte toward the formation of AAO membrane. The anodising voltage was control from 90V to 130V while concentration, time, and temperature were kept constant at 1M, 60 minute and 15°C respectively. The characterisation of the AAO membrane was done by using scanning electron microscopy (SEM). The results of this study confirm that the addition of organic acid in the acidic based electrolyte resulted to the larger pores size of AAO membrane.

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“…Aluminum anodizing is a simple electrochemical technique that is used to form thick anodic oxide films on an aluminum surface and has been widely investigated in the fields of surface science and engineering for corrosion protection, electronic devices, and optical materials [1][2][3][4][5][6][7]. Anodic oxide films fabricated via aluminum anodizing can be typically classified into the following two groups: barrier type oxide films formed in neutral solutions and porous type oxide films (porous alumina) formed in acidic and alkaline solutions [1,2,[8][9][10][11][12][13][14][15][16][17][18]. Typically, anodizing in acidic solutions, such as sulfuric (H 2 SO 4 ), oxalic ((COOH) 2 ), and phosphoric acid (H 3 PO 4 ), causes the formation of porous alumina which consists of numerous nanoscale hexagonal cells measuring several tens or hundreds of nanometers in diameter with a nanopore at the center of each cell [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Superhydrophilicity of a nanofiber-covered aluminum surface fabricated via pyrophosphoric acid anodizing

Nakajima

Kikuchi

Natsui

et al. 2016

Applied Surface Science

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A Novel Process to Produce Nano Porous Aluminum Oxide Using Alkaline Sodium Phosphate Electrolyte

Cited by 5 publications

References 17 publications

Sealing effect on corrosion resistance of boric sulfuric acid anodizing on AA2024

Sealing effect on corrosion resistance of boric sulfuric acid anodizing on AA2024

A Study on the Effect of Modified Electrolyte to the Formation of AAO Membrane in Anodising Process

Superhydrophilicity of a nanofiber-covered aluminum surface fabricated via pyrophosphoric acid anodizing

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