Oxide film on 5052 aluminium alloy: Its structure and removal mechanism by activated CsF–AlF3 flux in brazing

2015 ◽  
Vol 337 ◽  
pp. 208-215 ◽  
Author(s):  
Bing Xiao ◽  
Dongpo Wang ◽  
Fangjie Cheng ◽  
Ying Wang
Keyword(s):  
Oxide Film ◽  
Aluminium Alloy ◽  
Removal Mechanism

scholarly journals Effects of laser paint stripping on oxide film damage of 2024 aluminium alloy aircraft skin

2021 ◽  
Vol 29 (22) ◽  
pp. 35516
Author(s):  
Feisen Wang ◽  
Qian Wang ◽  
Haiqi Huang ◽  
Yinfen Cheng ◽  
Lihua Wang ◽  
...  
Keyword(s):  
Oxide Film ◽  
Aluminium Alloy ◽  
Paint Stripping ◽  
Aircraft Skin

Numerical modelling of entrainment of oxide film defects in filling of aluminium alloy castings

2004 ◽  
Vol 17 (6) ◽  
pp. 321-331 ◽  
Author(s):  
X. Yang ◽  
X. Huang ◽  
X. Dai ◽  
J. Campbell ◽  
J. Tatler
Keyword(s):  
Numerical Modelling ◽  
Oxide Film ◽  
Aluminium Alloy ◽  
Alloy Castings

scholarly journals Tensile tests on alloy crystals. - Part IV.— A copper alloy containing five per cent. Aluminium

1927 ◽  
Vol 116 (775) ◽  
pp. 694-702 ◽  
Keyword(s):  
Oxide Film ◽  
Aluminium Alloy ◽  
Tensile Properties ◽  
Cross Section ◽  
Copper Alloy ◽  
Vertical Section ◽  
Vertical Axis ◽  
Tensile Tests ◽  
The Other ◽  
X Ray

A previous paper described the preparation and tensile properties of brass crystals containing 25 to 30 per cent. zinc. Similar experiments have now been carried out with a copper-aluminium alloy containing 5 per cent, aluminium, which was kindly prepared by the Broughton Copper Company. Crystals of this alloy were easier to prepare than the brass crystals and the composition was more uniform, as unlike zinc, aluminium is not volatile. On the other hand, a very resistant oxide film forms on the surface, and the prepared surfaces of the crystals tarnish very readily. The bars were sound, except near the top, where very well-developed dendrites were formed. It was found on etching that the crystals were not always of uniform orientation throughout; and were very much cored. Bands of very slightly differing orientation occurred, of which fig. 1 (Plate 20) is an example. This has almost the appearance of lamellar twinning. Actually, X-ray measurements showed that both parts had the same relationship to the vertical axis, but that one part was rotated 7° with regard to the other, about their plane of union, which in this case was nearly perpendicular to the axis. Figs. 2 and 3 (Plate 20) are photographs of the cross-section and vertical section of the same crystal. The scratch in fig. 2 corresponds with the plane of the section shown in fig. 3. The cores are not developed uniformly, nor are they evenly spaced. In this particular crystal those perpendicular to the axis were most complete. X-ray measurements showed that both sections were {100} planes, indicating that the cores followed the cubic axes of the crystal, but as the photographs show, they were not equally developed along the three possible directions. This is in accordance with previous observations on the crystallization of metals.

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.

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