Porous anodic alumina formed by anodization of aluminum alloy (AA1050) and high purity aluminum

2010 ◽  
Vol 55 (14) ◽  
pp. 4377-4386 ◽  
Author(s):  
Leszek Zaraska ◽  
Grzegorz D. Sulka ◽  
Janusz Szeremeta ◽  
Marian Jaskuła
Keyword(s):  
Aluminum Alloy ◽  
High Purity ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
High Purity Aluminum

ALMAG 35

Alloy Digest ◽  
1962 ◽  
Vol 11 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Physical Properties ◽  
High Purity ◽  
Heat Treating ◽  
High Purity Aluminum ◽  
Shock Resistance ◽  
Cast Condition ◽  
Stable Combination

Abstract ALMAG 35 is a high purity aluminum alloy of the aluminum-magnesium type which possesses high and stable combination of strength, shock resistance, and ductility in the cast condition. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-4. Producer or source: William F. Jobbins Inc.. Originally published January 1953, revised March 1962.

Fast Fourier Transform Analysis of Images of Scanning Electron Microscope of Porous Anodic Alumina

2015 ◽  
Vol 1109 ◽  
pp. 69-72
Author(s):  
Chun Hong Voon ◽  
Mohd Nazree Derman ◽  
Kai Loong Foo ◽  
M. Nuzaihan ◽  
Uda Hashim
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
High Purity ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Oxide Dissolution ◽  
Purity Aluminium ◽  
High Purity Aluminium ◽  
Scanning Electron

In this study, Fast Fourier Transform (FFT) analysis was conducted on the images of scanning electron microscope of morphology of the porous anodic alumina formed on high purity aluminium. High purity aluminium substrates were anodized at 50 V in 0.3 M oxalic acid of 15°C for 60 minutes. As anodized porous anodic alumina were then subjected to oxide dissolution treatment of increasing exposure duration, up to three minutes. Micrographs were captured by using scanning electron microscope and the images were analyzed using FFT. It was found that the FFT images of as anodized porous anodic alumina and porous anodic alumina subjected to oxide dissolution treatment up to two minutes were similar, which were disc shaped white forms, indicating no ordered periodic structures were formed. When porous anodic alumina subjected to oxide dissolution treatment for three minutes, FFT image showed six distinct spots at the edges of a hexagon, indicating a perfect hexagonal pore arrangement was obtained for porous anodic alumina subjected to oxide dissolution treatment for three minutes.

scholarly journals Study of coloured anodized coatings on aluminum alloy by electrochemical impedance spectroscopy

2021 ◽  
Vol 12 (2-2021) ◽  
pp. 197-204
Author(s):  
K. I. Oskin ◽  
◽  
N. M. Yakovleva ◽  
E. A. Chupakhina ◽  
K. V. Stepanova ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Circuit Simulation ◽  
Electrical Circuit ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Equivalent Electrical Circuit ◽  
Hydrothermal Sealing

Anodizing, porous anodic alumina, electrochemical impedance spectroscopy, electrolytic coloring, hydrothermal sealing, equivalent electrical circuit, simulation.

Effect of Concentration of Oxalic Acid on the Synthesis of Porous Anodic Alumina (PAA) on Aluminum Alloy AA6061

2016 ◽  
Vol 857 ◽  
pp. 281-285
Author(s):  
Chun Hong Voon ◽  
Bee Ying Lim ◽  
K.L. Foo ◽  
Uda Hashim ◽  
Sung Ting Sam ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Oxalic Acid ◽  
Pore Size ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Edx Analysis ◽  
Interpore Distance ◽  
Ordered Porous

In this study, porous anodic alumina was formed by anodizing of aluminum alloy AA6061 in oxalic acid with concentration ranged from 0.1 M to 1.0 M respectively. AA6061 alloys were anodized at 40 V and 25°C for 60 minutes. FESEM images show that the uniformity of the pores arrangement of porous anodic alumina depends significantly on the concentration of oxalic acid. Well-ordered porous anodic alumina was formed in oxalic acid of 0.3 M, 0.5 M and 0.7 M while disordered porous anodic alumina were formed when the oxalic acid of 0.1 M and 1.0 M were used as electrolytes. EDX analysis revealed that the only peaks corresponding to aluminum and oxygen were detected. Pore size was found to increase with the concentration of oxalic acid while the interpore distance remained almost unchanged although the concentration of oxalic acid increased from 0.1 M to 0.7 M. Atypical anodic alumina without pores arrangement was formed when 1.0 M oxalic acid was used for anodizing.

Synthesis of Porous Anodic Alumina on Aluminium Manganese Alloys

2015 ◽  
Vol 1109 ◽  
pp. 78-82
Author(s):  
Chun Hong Voon ◽  
Mohd Nazree Derman ◽  
U. Hashim ◽  
Kai Loong Foo ◽  
Seng Teik Ten
Keyword(s):  
Aluminium Alloy ◽  
High Purity ◽  
Manganese Content ◽  
Secondary Phase ◽  
Optical Microscope ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Aluminium Substrate ◽  
Purity Aluminium ◽  
High Purity Aluminium

In this study, porous anodic alumina was formed on aluminium alloy substrate with increasing manganese content, from high purity aluminium with 0 wt% Mn to aluminium alloy with 2.0 wt% manganese by anodizing. Substrates were anodized at 50 V in 0.3 M oxalic acid of 15°C for 60 minutes. Images from the optical microscope revealed that no secondary phase existed in high purity aluminium and aluminium substrate with 0.5 wt% manganese while two phases were observed when the manganese contents were higher than 0.5 wt%. Element dispersive X ray spectroscopy spot analysis suggested that the secondary phase consists of both aluminium and manganese. Well ordered porous anodic alumina was obtained on high purity aluminium and aluminium substrate with 0.5 wt% manganese while pore arrangement of porous anodic alumina was significant disturbed when aluminium alloys with manganese contents higher than 0.5 wt% were anodized.

Synthesis of Porous Anodic Alumina (PAA) on Aluminum Alloy AA6061 in Mixture of Phosphoric Acid and Oxalic Acid

2016 ◽  
Vol 857 ◽  
pp. 237-241
Author(s):  
Chun Hong Voon ◽  
Bee Ying Lim ◽  
K.L. Foo ◽  
Uda Hashim ◽  
Sung Ting Sam ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Oxalic Acid ◽  
Phosphoric Acid ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
X Ray Diffraction ◽  
X Ray ◽  
Interpore Distance ◽  
Diffraction Patterns ◽  
Ordered Porous

In this study, porous anodic alumina was formed on aluminum alloy AA6061 by anodizing using mixture of 0.3 M oxalic acid and phosphoric acid with concentration ranged from 0.1 M to 1.0 M. AA6061 alloys were anodized at 40 V and 25°C for 60 minutes. FESEM images show that the uniformity of the pores arrangement of porous anodic alumina decreased with the increasing concentration of phosphoric acid in the electrolyte. Well-ordered porous anodic alumina was formed in mixture of 0.3 M oxalic acid and 0.1 M phosphoric acid while disordered porous anodic alumina were formed when the concentration of phosphoric acid were in the range of 0.3 M to 1.0 M. Pore size and interpore distance were found to increase with the concentration of phosphoric acid in the mixture. X-ray diffraction patterns show that to γ-Al2O3 were formed on the surface of AA6061 after the anodizing process, regardless of the concentration of phosphoric acid in the mixture electrolyte.

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