scholarly journals Surface structure and photocatalytic performance of an anodic oxide layer fabricated on titanium in a nitrate/ethylene glycol electrolyte with different treatment durations

2016 ◽  
Vol 294 ◽  
pp. 109-114 ◽  
Author(s):  
Naofumi Ohtsu ◽  
Kento Yokoi
Keyword(s):  
Ethylene Glycol ◽  
Surface Structure ◽  
Oxide Layer ◽  
Photocatalytic Performance ◽  
Anodic Oxide ◽  
Anodic Oxide Layer

scholarly journals An In Situ Reflection Mode Quick Scanning EXAFS Study of Anodic Oxide Layer Formation on Silver

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-717-C2-722 ◽  
Author(s):  
D. Hecht ◽  
P. Borthen ◽  
R. Frahm ◽  
H.-H. Strehblow
Keyword(s):  
Oxide Layer ◽  
Anodic Oxide ◽  
Layer Formation ◽  
Reflection Mode ◽  
Exafs Study ◽  
Anodic Oxide Layer

Formation of Anodic Oxide Nanotubes in H2O2 - Fluoride Ethylene Glycol Electrolyte as Template for Electrodeposition of α-Fe2O3

2013 ◽  
Vol 832 ◽  
pp. 333-337 ◽  
Author(s):  
Zainovia Lockman ◽  
Dede Miftahul Anwar ◽  
Monna Rozana ◽  
Syahriza Ismail ◽  
Ehsan Ahmadi ◽  
...  
Keyword(s):  
Oxide Film ◽  
Ethylene Glycol ◽  
Pore Size ◽  
Surface Structure ◽  
Anodic Oxidation ◽  
Chloride Solution ◽  
Anodic Oxide ◽  
Nanoporous Structure ◽  
20 Nm

Anodic oxidation of titanium (Ti), zirconium (Zr) and niobium (Nb) foils in fluoride ethylene glycol (EG) added to it 1 H2O2 as oxidant was done to produce oxide film with nanostructures at 40 V. Whilst arrays of aligned nanotubes were successfully formed on the surface of Ti and Zr respectively, anodic Nb2O5 was found to consist of nanoporous structure with pore size of ~ 20 nm. Despite long nanotubes were formed on both Ti (2 μm) and Zr (3 μm), the surface of the nanotubes suffered from severe dissolution, thinning the wall and collapsing them. Well defined, ordered surface structure of the nanotubes is required as they will be used as template for subsequent deposition of nanoparticles. This was achieved when Ti anodised in 5 ml H2O2 fluoride EG. With excess H2O2 etching at the surface occur more uniformly forming homogenous surface structure. α-Fe2O3 were then electrodeposited on this surface at-3 V from chloride solution and the mode of formation is believed to be due to electrogeneration of base at the surface of the TiO2.

The nature of the luminescence centers of the anodic oxide layer on aluminum

1971 ◽  
Vol 14 (11) ◽  
pp. 1584-1586
Author(s):  
T. Z. Tseitina ◽  
M. I. �idel'berg
Keyword(s):  
Oxide Layer ◽  
Anodic Oxide ◽  
Luminescence Centers ◽  
Anodic Oxide Layer

scholarly journals Corrosion protection of iron using porous anodic oxide/conducting polymer composite coatings

2015 ◽  
Vol 180 ◽  
pp. 479-493 ◽  
Author(s):  
Yoshiki Konno ◽  
Etsushi Tsuji ◽  
Yoshitaka Aoki ◽  
Toshiaki Ohtsuka ◽  
Hiroki Habazaki
Keyword(s):  
Oxide Layer ◽  
Composite Coating ◽  
Corrosion Protection ◽  
Composite Coatings ◽  
Anodic Oxide ◽  
Oxide Interface ◽  
Self Organized ◽  
Anodic Oxide Layer ◽  
Poor Adhesion ◽  
Protection Of Metals

Conducting polymers (CPs), including polypyrrole, have attracted attention for their potential in the protection of metals against corrosion; however, CP coatings have the limitation of poor adhesion to metal substrates. In this study, a composite coating, comprising a self-organized porous anodic oxide layer and a polypyrrole layer, has been developed on iron. Because of electropolymerization in the pores of the anodic oxide layer, the composite coating showed improved adhesion to the substrate along with prolonged corrosion protection in a NaCl aqueous corrosive environment. The anodic oxide layers are formed in a fluoride-containing organic electrolyte and contain a large amount of fluoride species. The removal of these fluoride species from the oxide layer and the metal/oxide interface region is crucial for improving the corrosion protection.

Growth of Anodized Layer and Cerium Sealing on Al7xxx/SiC Composite

2015 ◽  
Vol 1119 ◽  
pp. 212-217
Author(s):  
Badrul Munir ◽  
Vika Rizkia ◽  
Johny W. Soedarsono ◽  
Bambang Suharno ◽  
Andi Rustandi
Keyword(s):  
Oxide Layer ◽  
Current Density ◽  
Room Temperature ◽  
Composite Layer ◽  
Protective Layer ◽  
Anodic Oxide ◽  
Anodic Film ◽  
Micro Cracks ◽  
Density Values ◽  
Anodic Oxide Layer

Anodizing process conducted in Al7xxx/SiC produced non-uniform thickness of porous anodic film with cavities, micro-pores and micro-cracks. Cerium sealing was chosen as a post treatment to remedy the poor anodic film by providing a composite layer in order to further enhance the corrosion resistance in aggressive environment. In this study, anodizing process was conducted in H2SO4solution at current density values of 15, 20, and 25 mA/cm2at room temperature, 0°C and-25°C for 30 minutes. Subsequently, electroless sealing was conducted in CeCl3.6H2O + H2O2solution at room temperature and pH 9 for 30 minutes. Integrated protection composed of anodizing at 0°C and cerium sealing process in Al7xxx/SiC produced cerium rich deposits in the diameter of 64 nm (± 3nm) on the surface of anodic oxide layer. These spherical deposits covered the entire surface of anodic oxide layer in accordance with the morphology of the oxide layer. Otherwise, almost no cerium deposit formed on the surface of the oxide layer by conducted integrated protection at room temperature and-25°C. The integrated process conducted at anodizing temperature of 0°C presented a highest protection degree. The cerium protective layer which leads to the decreasing of corrosion rate and current density up to 99,99% or four orders magnifications than that of bare composite.

The composition of an anodic oxide layer on titanium

1965 ◽  
Vol 16 (8) ◽  
pp. 1213-1214 ◽  
Author(s):  
M Fox ◽  
R H Hanson ◽  
B S Munro
Keyword(s):  
Oxide Layer ◽  
Anodic Oxide ◽  
Anodic Oxide Layer
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