scholarly journals Anodic Film Growth on Aluminum Alloys: Interfacial Enrichment of Alloying Elements and Their Mobility in Anodic Films.

1998 ◽  
Vol 49 (8) ◽  
pp. 854-859 ◽  
Author(s):  
Hiroki HABAZAKI ◽  
Kenichi SHIMIZU ◽  
Peter SKELDON ◽  
George E. THOMPSON ◽  
Graham C. WOOD
Keyword(s):  
Aluminum Alloys ◽  
Film Growth ◽  
Alloying Elements ◽  
Anodic Film ◽  
Anodic Films

Mechanical instability and pore generation in anodic alumina

2006 ◽  
Vol 462 (2072) ◽  
pp. 2345-2358 ◽  
Author(s):  
S.J Garcia-Vergara ◽  
L Iglesias-Rubianes ◽  
C.E Blanco-Pinzon ◽  
P Skeldon ◽  
G.E Thompson ◽  
...  
Keyword(s):  
Pore Formation ◽  
Anodic Alumina ◽  
Anodic Film ◽  
Nuclear Reaction Analysis ◽  
Wall Region ◽  
High Plasticity ◽  
Mechanical Instability ◽  
Porous Films ◽  
Anodic Films ◽  
Growth Stresses

This paper examines the mechanism of pore formation in anodic films on aluminium. For this purpose, the dimensional changes of specimens during growth of porous films on aluminium in phosphoric and sulphuric acid electrolytes are examined using transmission and scanning electron microscopies. Further, the compositions of films and the efficiencies of anodizing are determined by Rutherford backscattering spectroscopy and nuclear reaction analysis. Significantly, the efficiency of anodizing is about 60%, while the surface of the anodic film is located above the original aluminium surface, i.e. before anodizing. The ratio of the thickness of the anodic film relative to the thickness of the consumed aluminium is about 1.35 for the selected conditions of anodizing. The behaviour runs counter to the widely accepted mechanism of pore formation by field-assisted dissolution of alumina. It is explained by the high plasticity of the anodic alumina in the barrier region in the presence of ionic transport, with film growth stresses displacing material from the barrier layer towards the cell wall region during anodizing. The response of the film to volume constraints on growth indicates a major role of stress and stress-relief processes in determining the morphology and self-regulating organization of pores.

A flow model of porous anodic film growth on aluminium

2006 ◽  
Vol 52 (2) ◽  
pp. 681-687 ◽  
Author(s):  
S.J. Garcia-Vergara ◽  
P. Skeldon ◽  
G.E. Thompson ◽  
H. Habazaki
Keyword(s):  
Flow Model ◽  
Film Growth ◽  
Anodic Film

scholarly journals Electric Transfer of ions of Alloying Elements in Aluminum Alloys by Magnetohydrodynamic Melt Processing

2017 ◽  
pp. 1031-1041
Author(s):  
Anatoly B. Laptev ◽  
◽  
Mikhail V. Pervukhin ◽  
Alexandr N. Afanasiev-Khodykin ◽  
Viktor N. Timofeev ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Melt Processing ◽  
Alloying Elements

Boric/Sulfuric Acid Anodizing of Aluminum Alloys 2024 and 7075: Film Growth and Corrosion Resistance

CORROSION ◽  
1999 ◽  
Vol 55 (11) ◽  
pp. 1052-1061 ◽  
Author(s):  
G. E. Thompson ◽  
L. Zhang ◽  
C. J. E. Smith ◽  
P. Skeldon
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Aluminum Alloys ◽  
Film Growth

Oxide film growth on titaniumaluminum alloys at 165–270°C

1971 ◽  
Vol 8 (3) ◽  
pp. 175-180 ◽  
Author(s):  
Donald L. Johnson ◽  
N.M. Bashara ◽  
Luh C. Tao
Keyword(s):  
Aluminum Alloys ◽  
Oxide Film ◽  
Film Growth ◽  
Titanium Aluminum Alloys ◽  
Titanium Aluminum

scholarly journals Effects of Alloying Elements in Aluminum Alloys and Activations on Zincate Treatment and Electroless Nickel-Phosphorus Plating

2010 ◽  
Vol 51 (1) ◽  
pp. 78-84 ◽  
Author(s):  
Koji Murakami ◽  
Makoto Hino ◽  
Ryosuke Furukawa ◽  
Teruto Kanadani
Keyword(s):  
Aluminum Alloys ◽  
Electroless Nickel ◽  
Alloying Elements

Behavior of Scandium in Aluminum Alloys of Different Alloying Systems

2014 ◽  
Vol 794-796 ◽  
pp. 1002-1007
Author(s):  
Boris V. Ovsyannikov ◽  
Viktor M. Zamyatin
Keyword(s):  
Chemical Composition ◽  
Aluminum Alloys ◽  
Intermetallic Compounds ◽  
Alloy Composition ◽  
Alloying Elements ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Manganese Alloy ◽  
X Ray

Microstructure and composition of elements in phases of homogenized ingots in aluminum alloys of various alloying systems: Al-Mg-Mn-Si, Al-Mg-Si-Cu, and Al-Zn-Mg-Cu, were examined using a method of scanning electronic microscopy and X-ray microanalysis. Besides basic alloying elements of magnesium, zinc, copper, silicon, and manganese, alloy composition contained additional alloying elements, including zirconium and scandium. Presence of intermetallic compounds of various chemical composition insoluble during ingot homogenization was found in microstructure of examined samples. It is found that zirconium and scandium are jointly present in composition of some intermetallic compounds containing additional alloying elements of alloys.

XPS Characterization of Porous and Sealed Anodic Films on Aluminum Alloys

2007 ◽  
Vol 154 (5) ◽  
pp. C241 ◽  
Author(s):  
S. Feliu ◽  
Ma. J. Bartolomé ◽  
J. A. González ◽  
S. Feliu
Keyword(s):  
Aluminum Alloys ◽  
Anodic Films ◽  
Xps Characterization
Sign in / Sign up

Export Citation Format

Share Document