A Study of the Anodic Oxidation on Aluminium by Ion-Implanted Xe Ions Marker and RBS Analysis Techniques

1988 ◽  
Vol 128 ◽  
Author(s):  
Hemting Chen ◽  
Xinde Bai ◽  
Wangpei Li ◽  
Mingjiang Dai
Keyword(s):  
Anodic Oxidation ◽  
Anodic Oxide ◽  
Anodic Oxide Film ◽  
Ammonium Citrate ◽  
Transport Numbers ◽  
Oxide Interface ◽  
Analysis Techniques ◽  
Marker Layer ◽  
Oxygen Anions ◽  
Ion Implanted

ABSTRACTThis paper presents the results on the mechanism of the anodic oxidation on Al by means of ion–implanted marker Layer of xenon and RBS analysis techniques. ExperimentaLly, it has been shown that the mechanisms of anoulic oxidation on Al are different in the different elctrolytes. In the solution of 15%.wt sulphuric-acid, the anodic oxide film is formed by the react ion be tweeit metal rations at the metal/oxide interface and continuously migrated oxygen anions. While in the solution of 5%wt ammonium citrate, both tie migration of the metal cations and that of the oxygen anions contribute to the formation of the anodic flim, and the oxidization takes place in internal region of the oxide ftim or at lhe interface. The transport numbers for Al in 5%.wt ammonium citrate were found to vary with the voltage or current density front 44% to 64∼

Study of the Anodic Oxidation on Ti and Ta6V (Ti6A14V) by Ion-Implanted Xe Ions Markers and O18 Tracing Techniques

1989 ◽  
Vol 157 ◽  
Author(s):  
Heming Chen ◽  
Mingjiang Dai ◽  
Xinde Bai ◽  
Wangpei Li
Keyword(s):  
Anodic Oxidation ◽  
Film Growth ◽  
Anodic Film ◽  
Ammonium Citrate ◽  
Double Layers ◽  
Transport Numbers ◽  
Metal Interface ◽  
Oxide Interface ◽  
Oxygen Anions ◽  
Tracing Techniques

ABSTRACTThe techniques of single and double layers of implanted Xe ions marker as well as the O18 tracing method are used to study the mechanism of the anodic oxidation of Ti and TA6V (Ti6A14V). It is observed that in 5 wt% ammonium citrate, the mechanism of the anodic oxidation of Ti is very different from that of TA6V. For Ti, new oxide is formed mainly by the migration of Ti cations to the solution/oxide interface and the regions at which new oxide is formed are at the solution/oxide interface and in the pre-oxide near the interface. While for TA6V, anodic film growth is due to the migration of oxygen anions to the oxide/metal interface and the growth regions of new oxide are at the oxide/metal interface and in the pre-oxide near the interface. Transport numbers for Ti oxidized in 1 wt%. KOH are calculated and found to be affected by oxidation temperature, i.e. at 3'C, the average transport number is 0.32, while at 30&00B0;C,it is 0.28. Current efficiencies are above 99.8%. AES spectra show that the distribution profiles of the elements V and Al in anodic film on TA6V are uniform.

Effect of Voltage on Mg-Li-Al Alloy Anodic Oxide Film

2018 ◽  
Vol 941 ◽  
pp. 1194-1197 ◽  
Author(s):  
Naoya Miyakita ◽  
Natsuki Tanigaki ◽  
Taiki Morishige ◽  
Toshihide Takenaka
Keyword(s):  
Oxide Film ◽  
Phosphoric Acid ◽  
Anodic Oxidation ◽  
Surface Coating ◽  
Low Voltage ◽  
Active Surface ◽  
Anodic Oxide ◽  
Al Alloys ◽  
Anodic Oxide Film ◽  
Al Alloy

Anodic oxidation of Mg-Li-Al alloys using phosphoric acid-based bath were processed to obtain the corrosion-proof surface coating. The specimen oxidized at low voltage anodically dissolved without the formation of oxidized film. Anodic oxidation film could be formed at higher voltage due to thin layer preferentially formed on tthe active surface, this layer develops to stable thick film. There were no significant differences in film thickness between LA141 and LA143 alloys.

Deposited emulsion particles in the pores of aluminum oxide film

1978 ◽  
Vol 36 (1) ◽  
pp. 450-451
Author(s):  
Michio Ashida ◽  
Yasukiyo Ueda
Keyword(s):  
Oxide Film ◽  
Acid Solution ◽  
Barrier Layer ◽  
Colloidal Particles ◽  
Oxalic Acid Solution ◽  
Anodic Oxide ◽  
Anodic Oxide Film ◽  
Carbon Replica ◽  
Sectioning Method ◽  
Thin Sectioning

An anodic oxide film is formed on aluminum in an acidic elecrolyte during anodizing. The structure of the oxide film was observed directly by carbon replica method(l) and ultra-thin sectioning method(2). The oxide film consists of barrier layer and porous layer constructed with fine hexagonal cellular structure. The diameter of micro pores and the thickness of barrier layer depend on the applying voltage and electrolyte. Because the dimension of the pore corresponds to that of colloidal particles, many metals deposit in the pores. When the oxide film is treated as anode in emulsion of polyelectrolyte, the emulsion particles migrate onto the film and deposit on it. We investigated the behavior of the emulsion particles during electrodeposition.Aluminum foils (99.3%) were anodized in either 0.25M oxalic acid solution at 30°C or 3M sulfuric acid solution at 20°C. After washing with distilled water, the oxide films used as anode were coated with emulsion particles by applying voltage of 200V and then they were cured at 190°C for 30 minutes.

Elucidation of the thickness inside the niobium anodic oxide film and its effect on adhesion to polyimide film

Vacuum ◽  
2021 ◽  
pp. 110265
Author(s):  
Munenori Yoshida ◽  
Hiromi Yamanaka ◽  
Kenta Tomori ◽  
Sergei Kulinich ◽  
Syuuichi Maeda ◽  
...  
Keyword(s):  
Oxide Film ◽  
Anodic Oxide ◽  
Polyimide Film ◽  
Anodic Oxide Film

The pore-enlargement and self-lubrication treatment of anodic oxide film of aluminum

Wear ◽  
1996 ◽  
Vol 196 (1-2) ◽  
pp. 214-218 ◽  
Author(s):  
Xu Tao ◽  
Chen Jianmin ◽  
Zhao Jiazheng ◽  
Dang Hongxin
Keyword(s):  
Oxide Film ◽  
Anodic Oxide ◽  
Anodic Oxide Film ◽  
Pore Enlargement

ChemInform Abstract: Evidence for an Ideal Transparent Anodic Oxide Film on Zirconium.

ChemInform ◽  
2010 ◽  
Vol 26 (29) ◽  
pp. no-no
Author(s):  
J. L. ORD ◽  
D. J. DE SMET
Keyword(s):  
Oxide Film ◽  
Anodic Oxide ◽  
Anodic Oxide Film

Study on Anodizing Processes for Formation of Nano Porous Aluminum Oxide Thin Films

2011 ◽  
Vol 236-238 ◽  
pp. 3061-3064
Author(s):  
Thein Thein Kyaw ◽  
Kyaw Myo Naing ◽  
Nyunt Win
Keyword(s):  
Oxide Film ◽  
Aluminum Oxide ◽  
Sulphuric Acid ◽  
Anodic Oxide ◽  
Film Coating ◽  
Anodic Oxide Film ◽  
Oxide Thin Film ◽  
Operation Condition ◽  
Porous Aluminum ◽  
Coating Weight

In this paper aluminum oxide thin film was prepared by anodic oxidation in various acid baths such as sulphuric acid, chromic acid and phosphoric acid with different concentrations. The thickness and appearance of the anodized films formed has been compared. The thicknesses of anodic oxide film, coating weight per unit area and coating ratio of anodic oxide film variation were determined with respect to the different electrolyte concentrations by using the thickness determination formula. Sulphuric acid gives the highest thickness aluminum oxide films, in the operation condition of 15% H2SO4solution composition, 15V, 30±2°C, 100 mA, 60 mins.

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